Weather in Washington DC in August
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn August, Washington DC sees average highs of 29.8°C (85.6°F) and lows of 20.6°C. Conditions are hot and very wet, with around 16 rainy days, with roughly 10.5 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Washington DC — every month compared. Once you know when to go, find your Washington DC packing list at 247PackingList.
Get ready for Washington DC in August
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Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
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- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Washington DC
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 7.4°C | 78.2mm | 10/10 |
| February | 9.5°C | 97.1mm | 10/10 |
| March | 14.4°C | 80.8mm | 10/10 |
| April | 18.7°C | 108.8mm | 9/10 |
| May | 22.9°C | 98.4mm | 10/10 |
| June | 28.7°C | 137.4mm | 9/10 |
| July | 31.7°C | 169.2mm | 9/10 |
| August | 29.8°C | 223.4mm | 8/10 |
| September | 25.8°C | 137.7mm | 9/10 |
| October | 20.4°C | 113.1mm | 9/10 |
| November | 14.1°C | 95.5mm | 10/10 |
| December | 9.5°C | 124.5mm | 9/10 |
Full month-by-month guide: best time to visit Washington DC →
For facts about United States — currency, language and dialling code — see our United States country guide at 247CountryInfo. Travellers also find it useful to keep a Washington DC travel guide to hand. Check clothing sizes in United States before you shop.
Frequently Asked Questions
Is August a good time to visit Washington DC?
August rates 8/10 for visiting Washington DC — good time to visit. Expect average highs of 29.8°C, 223.4mm of rain across the month and about 10.5 hours of daily sunshine.
What is the temperature in Washington DC in August?
In August, Washington DC has average highs of 29.8°C (85.6°F) and average lows of 20.6°C (69.1°F).
Does it rain in Washington DC in August?
Yes — August is one of the wetter months in Washington DC, averaging 223.4mm of rain over roughly 16 rainy days. Pack for heavy showers.
What should I wear in Washington DC in August?
For Washington DC in August (29.8°C highs / 20.6°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, compact travel umbrella.
More essentials for Washington DC in August
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.