Washington, D.C. weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Fair
Best time to visit: April – June, September – October
What is the weather like in Washington, D.C. in July?
In July, Washington, D.C. is hot: daytime highs average 31 °C, and even at night it stays warm at around 21 °C. The sea averages 25.6 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 104 mm in total. On about 19 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in Washington, D.C..
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 39 min05:54 – 20:34
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 21 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 19 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 50 %50 %
- Sunshineweight 20 %80 %
- Few rainy daysweight 30 %44 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Washington, D.C. in July: quick answers
Is Washington, D.C. hot in July?
Yes. In July, Washington, D.C. is hot: daytime highs average 31 °C and nights stay around 21 °C. On about 19 days the thermometer climbs to 30 °C or more.
Can you swim in Washington, D.C. in July?
Yes. In July the sea averages 25.6 °C – pleasant for swimming.
Does it rain much in Washington, D.C. in July?
Rain is frequent, with about 12 rainy days and 104 mm in total.
Washington, D.C. month by month
The whole year in Washington, D.C.All destinations: USAWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences