Washington DC in Summer — Weather & What to Expect
Summer in Washington DC (June, July, August) averages daytime highs of 30.1°C and lows of 19.9°C, with around 530.0mm of rain across the season (43 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Washington DC covers June, July, August.
Summer in Washington DC month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 28.7°C | 17.7°C | 137.4mm | 12 | 9/10 |
| July | 31.7°C | 21.4°C | 169.2mm | 15 | 9/10 |
| August | 29.8°C | 20.6°C | 223.4mm | 16 | 8/10 |
What to pack for Washington DC in summer
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
- Lightweight, breathable clothing
- High SPF sunscreen
Frequently Asked Questions
Is summer a good time to visit Washington DC?
Summer in Washington DC rates around 9/10 — excellent time to visit. Average highs are 30.1°C with 530.0mm of rain across the season.
How hot is Washington DC in summer?
Daytime highs average 30.1°C (86.2°F) across June, July, August, with nights around 19.9°C.
What months are summer in Washington DC?
Washington DC is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Washington DC · Washington DC annual climate · Washington DC in spring · Washington DC in autumn · Washington DC in winter
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Once you know what summer in Washington DC looks like, find out exactly what to pack for Washington DC at 247PackingList. For currency, language and country facts, see the United States guide at 247CountryInfo.
Summer in Washington DC — what to pack
Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →Check clothing sizes in United States at 247Sizing before you shop.
More summer travel essentials
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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.