Washington weather in August
August is one of the best months to visit Washington: highs of 30°C (86°F) and about 109 mm (4.3 in) of rain on average. Nights average 20°C (68°F) and cloud cover 54% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 2nd warmest. Compared with July, it is cooler and about as wet; September brings highs of 27°C (80°F) and 107 mm (4.2 in) of rain.
Is August a good time to visit Washington?
best month Weather score 71/100.
Yes. August is one of the best months for weather in Washington.
Advertisement
Does it rain a lot in Washington in August?
Some rain is normal: about 109 mm (4.3 in) falls in an average August. It is the 4th wettest month of the year.
How warm is Washington in August?
Days average 30°C (86°F) and nights 20°C (68°F).
Washington weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 4°C (39°F) | -4°C (25°F) | 67 mm | 61% | least pleasant |
| February | 6°C (42°F) | -3°C (26°F) | 70 mm | 61% | least pleasant |
| March | 11°C (52°F) | 1°C (33°F) | 84 mm | 60% | fair |
| April | 18°C (64°F) | 7°C (44°F) | 92 mm | 59% | best |
| May | 23°C (73°F) | 13°C (55°F) | 109 mm | 61% | best |
| June | 28°C (82°F) | 18°C (64°F) | 118 mm | 56% | best |
| July | 31°C (87°F) | 21°C (69°F) | 116 mm | 56% | best |
| August | 30°C (86°F) | 20°C (68°F) | 109 mm | 54% | best |
| September | 27°C (80°F) | 16°C (61°F) | 107 mm | 52% | best |
| October | 20°C (67°F) | 9°C (49°F) | 105 mm | 52% | best |
| November | 13°C (55°F) | 3°C (37°F) | 80 mm | 53% | fair |
| December | 7°C (44°F) | -1°C (30°F) | 95 mm | 61% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Advertisement