Washington, D.C. Weather
Weather in Washington, D.C.: current conditions, forecast, warnings, monthly averages and seasonal guide
Hourly forecast
7-day forecast for Washington, D.C.
| Day | Conditions | Rain | Temp | Summary | |
|---|---|---|---|---|---|
| Today28 Apr | Light drizzle | 20%0.1mm | 20°C8°C | Light drizzle with a high of 20°C and low of 8°C. 20% chance of rain, up to 0.1mm. UV index 3.2 (moderate). | |
| Wed29 Apr | Heavy rain | 83%54.6mm | 18°C10°C | Heavy rain with a high of 18°C and low of 10°C. 83% chance of rain, up to 54.6mm. UV index 6.7 (high). | |
| Thu30 Apr | Overcast | 83% | 18°C9°C | Overcast with a high of 18°C and low of 9°C. 83% chance of rain. UV index 7.3 (high). | |
| Fri1 May | Light drizzle | 24%0.1mm | 16°C8°C | Light drizzle with a high of 16°C and low of 8°C. 24% chance of rain, up to 0.1mm. UV index 6 (high). | |
| Sat2 May | Overcast | 24% | 16°C7°C | Overcast with a high of 16°C and low of 7°C. 24% chance of rain. UV index 7.5 (high). | |
| Sun3 May | Overcast | 13% | 17°C5°C | Overcast with a high of 17°C and low of 5°C. 13% chance of rain. UV index 6.8 (high). | |
| Mon4 May | Overcast | 12% | 19°C10°C | Overcast with a high of 19°C and low of 10°C. 12% chance of rain. UV index 5 (moderate). |
Extended outlook — days 8 to 14
Extended forecasts beyond 7 days are less reliable and should be used as a general guide only.
| Day | Conditions | Rain | Temp | Summary | |
|---|---|---|---|---|---|
| Tue5 May | Overcast | 18% | 24°C9°C | Overcast with a high of 24°C and low of 9°C. 18% chance of rain. UV index 7.1 (high). | |
| Wed6 May | Overcast | 28% | 27°C15°C | Overcast with a high of 27°C and low of 15°C. 28% chance of rain. UV index 6.1 (high). | |
| Thu7 May | Moderate drizzle | 28%5.4mm | 21°C9°C | Moderate drizzle with a high of 21°C and low of 9°C. 28% chance of rain, up to 5.4mm. UV index 0.9 (low). | |
| Fri8 May | Overcast | 20% | 17°C8°C | Overcast with a high of 17°C and low of 8°C. 20% chance of rain. UV index 4.4 (moderate). | |
| Sat9 May | Overcast | 35% | 17°C9°C | Overcast with a high of 17°C and low of 9°C. 35% chance of rain. UV index 5.7 (moderate). | |
| Sun10 May | Overcast | 30% | 23°C8°C | Overcast with a high of 23°C and low of 8°C. 30% chance of rain. UV index 7.1 (high). | |
| Mon11 May | Overcast | 14% | 27°C15°C | Overcast with a high of 27°C and low of 15°C. 14% chance of rain. UV index 5.7 (moderate). |
Sun & Moon — Washington, D.C.
UV Index — Washington, D.C.
Some protection needed. Wear sunglasses on bright days.
Air Quality — Washington, D.C.
Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Air quality data from Open-Meteo
Climate overview
Washington, D.C. experiences a humid subtropical climate (Cfa), as classified by the Köppen system. This designation is characterized by hot, humid summers and mild to cool winters, with precipitation distributed relatively evenly throughout the year. The city's location on the East Coast of the United States, nestled between the Atlantic Ocean and the Appalachian Mountains, significantly influences its weather patterns.
The dominant factor in Washington D.C.'s climate is its proximity to the Atlantic Ocean, which provides a moderating effect on temperatures but also contributes to high humidity, especially during the summer months. Warm, moist air masses frequently flow northward from the Gulf of Mexico and the Atlantic, leading to muggy conditions and ample rainfall. Conversely, cold air masses from Canada can sweep down during winter, bringing occasional drops in temperature and sometimes snow.
Prevailing winds generally come from the west, carrying continental air, but sea breezes from the Chesapeake Bay and the Atlantic Ocean can penetrate inland, particularly in late spring and summer, offering some relief from urban heat. The city's relatively low elevation, generally between sea level and about 125 meters (410 feet), means it is not significantly affected by altitude in terms of temperature or precipitation, unlike regions with higher mountainous terrain. However, the varied typography within the greater D.C. area can create subtle microclimates.
Compared to cities at similar latitudes further inland, Washington D.C. benefits from the Atlantic's moderating influence, leading to less extreme temperature swings. For example, cities in the Midwest at similar latitudes tend to have colder winters and slightly hotter, less humid summers due to their continental positions. Its climate shares similarities with other mid-Atlantic cities like Richmond, Virginia, and Baltimore, Maryland, though D.C. can sometimes experience slightly higher urban heat island effects due to its dense development.
Washington, D.C. receives Washington, D.C. receives an annual average rainfall of approximately 1,000 to 1,100 mm (39 to 43 inches). This is fairly consistent throughout the year, without a distinct dry season, supporting lush vegetation across the region. of rainfall annually, with the wettest months from The wettest months are typically May to September, with frequent thunderstorms contributing to higher precipitation totals. Historically, August can often be the wettest single month.. Washington, D.C. enjoys approximately 2,500 to 2,600 hours of sunshine annually. This translates to about 8-10 hours of sunshine per day in summer, providing ample daylight for outdoor activities, while winter sees around 5-6 hours daily.
This amount is slightly above the national average for the East Coast. High sunshine hours, especially in summer, mean that UV radiation can be very strong, often reaching levels of 8-10 (very high), necessitating robust sun protection measures like sunscreen, hats, and sunglasses, even on partly cloudy days.
Washington, D.C.'s urban environment creates a significant 'urban heat island' effect, where central developed areas can be several degrees warmer than surrounding suburban or rural regions, particularly at night. This is due to the absorption and retention of heat by asphalt, concrete, and buildings.
Proximity to the Potomac River and its tributaries also moderates temperatures slightly in adjacent neighborhoods, especially in winter. Elevational differences within the city, though subtle, can sometimes influence localized fog or frost patterns. The presence of numerous parks and green spaces, like Rock Creek Park, helps to mitigate the urban heat island effect locally, providing cooler pockets within the city.
Monthly averages for Washington, D.C.
Climate data sourced from National Weather Service (NWS) climate data for Washington, D.C.. Summer temperatures range from Summers are hot and humid, with average daily temperatures ranging from 26°C to 32°C (79°F to 90°F). Overnight lows rarely drop below 20°C (68°F), contributing to consistently warm conditions., while winter sits between Winters are mild to cool, with average daily temperatures generally between -1°C and 8°C (30°F to 46°F). Freezing temperatures are common overnight, but prolonged severe cold is infrequent..
| Month | Avg High | Avg Low | Rain (mm) | Rain Days |
|---|---|---|---|---|
| January | 5.9°C | -2.3°C | 79.2 | 9.8 |
| February | 7.9°C | -1.3°C | 71.1 | 9.1 |
| March | 13°C | 3°C | 96 | 10.9 |
| April | 19.3°C | 8.3°C | 86.4 | 10.3 |
| May | 24.3°C | 13.7°C | 102.6 | 11.1 |
| June | 29.2°C | 19.1°C | 98.6 | 9.8 |
| July | 31.8°C | 21.7°C | 101.9 | 10.2 |
| August | 30.6°C | 20.9°C | 91.2 | 9 |
| September | 26.7°C | 16.8°C | 99.1 | 8 |
| October | 20.3°C | 10.2°C | 91.9 | 7.7 |
| November | 14.1°C | 4.6°C | 82.3 | 8.7 |
| December | 8°C | 0°C | 83.1 | 9.6 |
Water temperature
Water temperatures in the Potomac River and Chesapeake Bay vary significantly by season. In summer, the waters can reach a warm 24-27°C (75-81°F), making them generally suitable for swimming, kayaking, and paddleboarding in designated areas.
However, it is important to note that water quality can be a concern in urban rivers, and swimming is often advised against after heavy rainfall due to runoff. In winter, water temperatures drop considerably to 3-7°C (37-45°F), making conditions too cold for swimming without specialized cold-water gear. While not a surfing destination, the cooler months support various marine life in the deeper parts of the bay. Estuary temperatures typically track closely with air temperatures.
Summer water temperatures around Washington, D.C. range from 24-27°C (75-81°F), cooling to 3-7°C (37-45°F) in winter.
Things to do this summer in Washington, D.C.
During Washington D.C.'s hot and humid summer, lightweight, breathable clothing made from natural fibers like cotton or linen is essential. Sunscreen with a high SPF, a wide-brimmed hat, and sunglasses are crucial for protection against strong UV rays. Stay hydrated by carrying a reusable water bottle and drinking plenty of fluids. Be aware of potential afternoon thunderstorms, which can pop up quickly, and seek shelter indoors. Driving conditions are generally good, but heavy rain can lead to localized flooding. Plan indoor activities during the hottest parts of the day.
- Georgetown Waterfront Park kayaking
- Outdoor concerts at Wolf Trap National Park for the Performing Arts
- National Mall picnicking and monument hopping
- Swimming at public pools like Francis Pool
- Attending a Washington Nationals baseball game
- Exploring the Smithsonian's National Zoo
- Rock Creek Park hiking and biking
Best time to visit Washington, D.C.
The best time to visit Washington, D.C. is during the spring (April to May) and autumn (September to October). These shoulder seasons offer pleasantly mild temperatures, lower humidity, and beautiful natural scenery as cherry blossoms bloom or fall foliage reaches its peak.
Spring is ideal for enjoying the National Cherry Blossom Festival and exploring outdoor monuments and gardens without the intense summer heat. Autumn provides comfortable weather for walking tours, visiting outdoor markets, and experiencing various festivals. These periods also generally see fewer crowds than the peak summer months, especially around major holidays.
Summer, while popular for family vacations, can be uncomfortably hot and humid, with frequent thunderstorms. Winter can be cold, but fewer tourists and the festive holiday decorations can make it appealing for indoor activities and museum visits. Avoid late July and August if you are sensitive to heat and humidity.
Weather radar — Washington, D.C.
Weather warnings & safety
Washington, D.C. is susceptible to several forms of severe weather. Thunderstorms are common from spring through early autumn, often bringing heavy rain, lightning, and strong winds. These can sometimes lead to localized flash flooding, particularly in low-lying areas and urban environments with extensive impervious surfaces.
During summer, heatwaves can occur, with temperatures exceeding 35°C (95°F) for several consecutive days, posing health risks. While not in a direct hurricane path, the city can experience the remnants of tropical storms and hurricanes, resulting in heavy rainfall, strong winds, and coastal flooding from storm surges up the Potomac River. Winter occasionally brings ice storms and blizzards, leading to hazardous driving conditions and power outages. Droughts are less common but can occur during extended dry spells.
Weather near Washington, D.C.
Frequently asked questions about Washington, D.C. weather
What is the weather in Washington, D.C. right now?
Right now in Washington, D.C. it is 13°C and overcast. Today's high is 20°C with a low of 8°C. Humidity is at 76%. Wind is S at 10 km/h.
What is the 14-day forecast for Washington, D.C.?
Today (28 Apr): Light drizzle with a high of 20°C and low of 8°C. 20% chance of rain, up to 0.1mm. UV index 3.2 (moderate). Wed (29 Apr): Heavy rain with a high of 18°C and low of 10°C. 83% chance of rain, up to 54.6mm. UV index 6.7 (high). Thu (30 Apr): Overcast with a high of 18°C and low of 9°C. 83% chance of rain. UV index 7.3 (high). Fri (1 May): Light drizzle with a high of 16°C and low of 8°C. 24% chance of rain, up to 0.1mm. UV index 6 (high). Sat (2 May): Overcast with a high of 16°C and low of 7°C. 24% chance of rain. UV index 7.5 (high). Sun (3 May): Overcast with a high of 17°C and low of 5°C. 13% chance of rain. UV index 6.8 (high). Mon (4 May): Overcast with a high of 19°C and low of 10°C. 12% chance of rain. UV index 5 (moderate). Tue (5 May): Overcast with a high of 24°C and low of 9°C. 18% chance of rain. UV index 7.1 (high). Wed (6 May): Overcast with a high of 27°C and low of 15°C. 28% chance of rain. UV index 6.1 (high). Thu (7 May): Moderate drizzle with a high of 21°C and low of 9°C. 28% chance of rain, up to 5.4mm. UV index 0.9 (low). Fri (8 May): Overcast with a high of 17°C and low of 8°C. 20% chance of rain. UV index 4.4 (moderate). Sat (9 May): Overcast with a high of 17°C and low of 9°C. 35% chance of rain. UV index 5.7 (moderate). Sun (10 May): Overcast with a high of 23°C and low of 8°C. 30% chance of rain. UV index 7.1 (high). Mon (11 May): Overcast with a high of 27°C and low of 15°C. 14% chance of rain. UV index 5.7 (moderate).
What is the air quality in Washington, D.C. today?
The current air quality index in Washington, D.C. is 29 (European AQI), rated "Fair". Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion. PM2.5 is 5.5 µg/m³. PM10 is 5.8 µg/m³.
What is the average temperature in Washington, D.C.?
Washington, D.C. experiences a wide range of temperatures throughout the year. Summers average high temperatures between 26°C to 32°C (79°F to 90°F), often accompanied by high humidity. Winters see average highs from -1°C to 8°C (30°F to 46°F), with occasional cold snaps and snowfall. Spring and autumn offer milder, more pleasant temperatures, averaging around 13°C to 20°C (55°F to 68°F).
When is the best time to visit Washington, D.C.?
The optimal times to visit Washington, D.C. are during spring (April to May) and autumn (September to October). These seasons boast comfortable temperatures, lower humidity, and beautiful natural displays like the cherry blossoms or vibrant fall foliage. These periods also tend to offer a good balance before the peak summer crowds and the chill of winter.
How much does it rain in Washington, D.C.?
Washington, D.C. receives a consistent amount of rainfall throughout the year, with an annual average between 1,000 to 1,100 mm (39 to 43 inches). There isn't a distinct dry season, and precipitation is fairly evenly distributed. The wettest months typically occur from May to September, often due to frequent afternoon thunderstorms.
What are the wind patterns in Washington, D.C.?
Prevailing winds in Washington, D.C. generally come from the west, bringing continental air. However, the city's proximity to the Atlantic Ocean and Chesapeake Bay means that sea breezes can influence local wind patterns, especially in the warmer months. These breezes typically bring some relief from heat and humidity. Stronger winds are often associated with passing storm systems, especially during thunderstorms or winter low-pressure systems.
What is the UV index like in Washington, D.C., and how can I protect myself?
The UV index in Washington, D.C. can be high, especially during summer months, often reaching levels of 8-10 (very high). Even in spring and autumn, moderate to high UV levels are common. It's crucial to protect yourself by using broad-spectrum sunscreen with SPF 30+, wearing protective clothing like long-sleeved shirts and wide-brimmed hats, and seeking shade, especially between 10 AM and 4 PM.
When are sunrise and sunset times in Washington, D.C.?
Sunrise and sunset times in Washington, D.C. vary significantly throughout the year due to the Earth's tilt. In summer, the sun rises as early as 5:45 AM and sets as late as 8:30 PM, providing long daylight hours. In winter, mornings are much darker, with sunrise around 7:20 AM and sunset as early as 4:50 PM. You can find today's exact times on our dedicated Sunrise and Sunset page.
What is the air quality usually like in Washington, D.C.?
Air quality in Washington, D.C. is generally good, but it can fluctuate depending on various factors. During summer, ground-level ozone can occasionally reach unhealthy levels due to heat and stagnant air. Particulate matter (PM2.5 and PM10) are typically monitored closely, and elevated levels can sometimes occur from traffic, industrial emissions, or wildfire smoke originating from distant regions. Real-time air quality information and health advisories are available on our /weather/air-quality page.
Are there any severe weather risks in Washington, D.C.?
Yes, Washington, D.C. faces several severe weather risks. These include intense thunderstorms from spring to fall, which can cause flash flooding. Summer brings the risk of heatwaves with dangerously high temperatures. While direct hurricane landfalls are rare, the city can experience significant impacts from the remnants of tropical storms. Winter can bring ice storms, significant snowfall, and blizzards, leading to hazardous conditions.
What should I wear for each season in Washington, D.C.?
In summer, lightweight, breathable fabrics are essential due to heat and humidity. Spring and autumn call for layers, as temperatures can vary throughout the day, with a light jacket or sweater for cooler mornings and evenings. Winter requires warm clothing, including a heavy coat, hat, gloves, and scarves, especially as temperatures often drop below freezing. Always check the forecast before dressing.
Is the Potomac River suitable for swimming?
While the Potomac River is a central feature of Washington, D.C., swimming directly in the river within the urban core is generally not recommended due to water quality concerns, especially after heavy rainfall. However, designated public swimming pools are available, and certain recreational activities like kayaking and paddleboarding are popular when water quality permits. Always check local advisories before engaging in water activities.
What are driving conditions like in Washington, D.C. during different seasons?
Driving in Washington, D.C. can be challenging due to traffic regardless of the season. In summer, heavy rainfall from thunderstorms can cause localized flooding and reduce visibility. Winter brings the risk of icy roads and snow, which can cause significant delays and hazardous conditions. Spring and autumn generally offer the best driving conditions, though always be mindful of increased pedestrian and cyclist traffic.
What moon phases can be seen in Washington, D.C.?
From Washington, D.C., all phases of the moon are visible throughout its monthly cycle, provided the skies are clear. These include New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent. The exact timing of these phases, along with illumination percentages, can be found on our dedicated Sunrise and Sunset page, which also tracks lunar events and provides a 14-day table.
How do I check the hourly forecast for Washington, D.C.?
You can find a detailed hour-by-hour forecast for Washington, D.C. on our dedicated /weather/hourly page. This forecast provides specific information on temperature, chances of precipitation, wind speed and direction, humidity levels, and other relevant details, helping you plan your day with precision. The forecast is updated regularly to provide the most current information available.
Where can I find information about tropical storms or hurricanes affecting Washington, D.C.?
When tropical storms or hurricanes threaten the region, detailed advisories and tracking information will be available from the National Weather Service. You can also find warnings and updates from our warning links, which direct you to the official sources. While direct landfalls are rare, the remnants of these systems can bring significant rainfall, strong winds, and flooding threats to Washington, D.C., necessitating close monitoring of official updates.