‹ Washington, DC weather by month
Typical September weather
Washington, DC
District of Columbia · September
81° days
64° nights
about 6 rainy days · 12½ hours of daylight
What to pack
- Sunscreen
What September feels like
September starts steamy and ends genuinely pleasant, and the city refills as Congress returns and the school year starts. The patios in Shaw and around Union Market get their best weeks of the year, and the tourist crowds have thinned to nothing.
Expect about 6 days with real rain — enough to notice, not enough to plan around. There’s a little humidity in the air, but nothing that changes your plans.
The numbers
| Typical high | 81° |
|---|---|
| Typical low | 64° |
| Days with real rain | 6 |
| Total rain | 3.9 in |
| Humidity | a touch humid |
| Sunrise / sunset (mid-month) | 6:49 am / 7:16 pm |