Weather in Washington DC in September
The weather is near-perfect with ideal temperatures and minimal rain. Recommended month to visit.
Climate Overview
September is an excellent time to visit Washington DC. Washington DC has a Moderate climate with average yearly highs of 24°C, lows of 16°C, and approximately 13 rainy days per month.
24°C
16°C
13days
12.5h
Is September a good time to visit Washington DC?
The weather is near-perfect with ideal temperatures and minimal rain.
Daylight
6:49 AM
7:20 PM
Weather by Month
| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 9°C | 0°C | 7 | Good |
| February | 10°C | 1°C | 12 | Good |
| March | 16°C | 5°C | 15 | Wet |
| April | 17°C | 6°C | 16 | Excellent (best) |
| May | 21°C | 11°C | 11 | Excellent (best) |
| June | 29°C | 19°C | 13 | Wet |
| July | 33°C | 23°C | 15 | Wet |
| August | 29°C | 21°C | 21 | Wet |
| September | 24°C | 16°C | 13 | Excellent (best) |
| October | 20°C | 11°C | 10 | Excellent (best) |
| November | 16°C | 7°C | 7 | Good |
| December | 8°C | 0°C | 6 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
What to Pack for September
Layers, a light jacket, comfortable walking shoes, and an umbrella.
Planning a trip to Washington DC?
Common Questions
Is September a good time to visit Washington DC? +
September is typically Excellent for visiting Washington DC, with average highs of 24°C and around 13 rainy days.
What should I pack for Washington DC in September? +
With highs of 24°C and lows of 16°C in {month}, we recommend: Layers, a light jacket, comfortable walking shoes, and an umbrella.
Does it rain a lot in Washington DC in September? +
Washington DC typically sees around 13 rainy days in September.
How many hours of daylight are there in Washington DC in September? +
In September, Washington DC gets approximately 12.5 hours of daylight per day.
Is September peak season in Washington DC? +
Yes, September is peak season in Washington DC. Expect higher prices and more crowds, but also the best weather.
What is the best month to visit Washington DC? +
The best months to visit Washington DC are April, May, September, October, when the weather is optimal for sightseeing.
More Washington DC Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Washington DC: top things to do, itineraries, and typical costs.