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Climate · Washington DC

Washington DC in August

Hot and damp, as the days shorten.

Typical weather, averaged over 30 years

August in Washington DC is hot: highs near 90°F, lows near 70°F. Rain falls on about three days a week, less often as the month goes on, and the days shorten by 1 hour 4 minutes from the first week to the last.August in Washington DC is hot: highs near 32°C, lows near 21°C. Rain falls on about three days a week, less often as the month goes on, and the days shorten by 1 hour 4 minutes from the first week to the last.

High
90°F32°Caverage
Low
70°F21°Caverage
Wet days
3a week · 39% of days
Daylight
13h 37mon average

Is August a good time to visit Washington DC?

August sits outside Washington DC's best months, which run in two parts: May, or October. Expect hot days and rain on about three days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How August sits in the year

week by week

Temperature

Highs near 90°F in August, against 47°F to 91°F through the year.Highs near 32°C in August, against 8°C to 33°C through the year.

Chance of a wet day

39% of days in August, against 26% to 40% through the year.

Cloud cover

41% cover in August, against 36% to 55% through the year.

Daylight

13h 37m in August, against 9h 29m to 14h 51m through the year.

Week by week, lightly smoothed, with August shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. July91°33°low 70°low 21°3 wet days a weekRain on about three days a week.
  2. August90°32°low 70°low 21°3 wet days a weekRain on about three days a week.
  3. September83°28°low 64°low 18°2 wet days a weekRain on about two days a week.

Where Washington DC sits, in August

America/New York
this place
typical high in August 40°F4°C95°F35°C
Sunrise, mid-August
6:21 AMsets 8:05 PM
Above the sea
0 mlow-lying
Latitude
38.9°Nnorthern hemisphere
Nearest of ours
New York328 km north-east

The land around Washington DC, shaded by its typical high in August, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in August

high · low · wet days
See August on the planning mapThe whole year in Washington DC

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Washington DC. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.