Verdict: Good month
Washington, D.C. Weather in August
August runs warm in Washington, D.C., with daily highs around 30°C (86°F) and nights near 20°C (68°F). It's also the wet side of the calendar: rain falls on about 16 days, so build flexibility into plans. Overall, August is a solid month to visit Washington, D.C..
Average high
30°C / 86°F
Average low
20°C / 68°F
Rain days
~16
Precipitation
218 mm
What to pack for Washington, D.C. in August
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 16 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Washington, D.C.: Jul (32°C / 90°F) · Coolest: Jan (7°C / 45°F) · Wettest: Aug (~16 rain days)
7°
-1°
Jan
10°
0°
Feb
14°
4°
Mar
19°
8°
Apr
23°
12°
May
29°
18°
Jun
32°
21°
Jul
30°
20°
Aug
26°
16°
Sep
20°
11°
Oct
14°
5°
Nov
9°
1°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)