Washington, DC Weather
Washington hourly forecast: next 24 hours
Today's high of 92°F (33°C) is about 12°F (7°C) above the typical September high of 80°F (26°C).
Current conditions in detail
Washington weather tomorrow (Friday, September 18)
Tomorrow in Washington looks sunny, with a high of 87° and an overnight low of 72°. Rain is unlikely (6% chance). Winds top out near 10 mph, and the UV index reaches 6 (moderate).
Washington 14-day forecast
About the weather in Washington
Washington runs one of the wider annual swings in our dataset: 24°C separates the average July from the average January. Afternoons reach 88°F (31°C) at the peak of summer and 44°F (6°C) at the depth of winter, with 132 days of measurable precipitation through the year.
Washington weather: quick facts
- Hottest month: July - highs near 88°F (31°C)
- Coldest month: January - highs near 44°F (6°C)
- Decade extremes (2015-2024): 101°F (38°C) high · -7°F (-21°C) low
- Wettest month: July (14 rainy days) · Sunniest: July (11.7 h sun/day)
- Climate type: humid subtropical
- Annual swing: 24°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 7 days a year
- Months averaging 30°C or hotter: 1
- Average humidity: 70%
Temperatures through the year
Snow falls on roughly 7 days a year, mostly January through March. January bottoms out at 44°F (6°C) in daylight, 28°F (-2°C) after dark. At its warmest, in July, Washington runs to 88°F (31°C) in the afternoon and back to 70°F (21°C) by dawn. Between the average July and the average January lie 24°C, a wider spread than roughly 79% of the cities we track.
Rain, sun and snow
Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is September through October. July is the wettest month at 6.9 inches (176 mm) over 14 days; November is the driest. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 101°F (38°C) and the lowest daily minimum -7°F (-21°C).
Season by season
Spring (March through May)
Through spring, Washington runs cool rather than cold: 65°F (19°C) by day, 46°F (8°C) after dark, and rain falls on around 34 of the 90 days.
Summer (June through August)
Summer in Washington is hot, with daytime highs averaging 86°F (30°C) and nights around 68°F (20°C); rain falls on around 41 of the 90 days. Daylight is generous - around 11.3 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall is pleasantly warm here - highs near 68°F (20°C), nights near 52°F (11°C), and expect showers on roughly 28 days across the season.
Winter (December through February)
Winter in Washington is chilly, with daytime highs averaging 47°F (8°C) and nights around 31°F (-1°C); expect showers on roughly 29 days across the season, plus about 5 snowy days.
Average temperatures in Washington by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 44° | 28° | 9 | 3.3 in | 6.1 h/day | 68% |
| February | 48° | 31° | 10 | 3.3 in | 7.0 h/day | 66% |
| March | 56° | 36° | 10 | 3.7 in | 8.0 h/day | 64% |
| April | 66° | 46° | 11 | 3.7 in | 9.2 h/day | 64% |
| May | 75° | 56° | 13 | 5.1 in | 9.7 h/day | 71% |
| June | 84° | 65° | 13 | 5.0 in | 11.5 h/day | 69% |
| July | 88° | 70° | 14 | 6.9 in | 11.7 h/day | 72% |
| August | 85° | 69° | 14 | 6.2 in | 10.8 h/day | 75% |
| September | 80° | 63° | 11 | 5.1 in | 8.8 h/day | 74% |
| October | 69° | 52° | 9 | 3.6 in | 8.0 h/day | 74% |
| November | 57° | 40° | 8 | 3.3 in | 7.6 h/day | 69% |
| December | 49° | 34° | 10 | 4.1 in | 6.0 h/day | 72% |