Washington DC Weather in July
United States · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
July in Washington DC sees average temperatures ranging from a low of 21.4°C (70.5°F) to a high of 31.6°C (88.9°F), with a mean of 26.0°C (78.8°F). Compared to the annual average of 14.2°C (57.6°F), this month is 11.8°C warmer than the yearly norm. This is the hottest month of the year, reaching 31.6°C (88.9°F) on average. Precipitation averages 161.6mm, making it approximately 43.0mm wetter than the monthly average of 119.0mm. The city receives an average of 11.9 hours of sunshine per day during July, with relative humidity averaging 72.2%. Wind speeds reach an average maximum of 14.1 km/h. For travelers, this month offers a hottest month of the year experience in Washington DC, with wetter-than-average conditions compared to the rest of the year.
There's something about Washington DC in late March when the cherry blossoms peak that turns the political city into something tender. I stood at the Tidal Basin one spring as 3,000 trees bloomed pink against the Jefferson Memorial — the data says peak bloom is usually the last week of March to first week of April, around 15°C. Summer (June-August) is famously brutal: 30°C with 70% humidity, the kind that makes the National Mall feel like a sauna. October is DC's secret weapon: 18°C, golden leaves along the Mall, and the cultural season reopening. Winter is quieter and the museums are empty — a trade-off worth making.
July vs Adjacent Months
| Metric | June | July | August |
|---|---|---|---|
| Mean Temp | 23.2°C (73.8°F) | 26.0°C (78.8°F) | 24.5°C (76.1°F) |
| Rainfall | 125.1mm | 161.6mm | 218.2mm |
| Sunshine | 11.6 hrs | 11.9 hrs | 10.5 hrs |
| Humidity | 66.3% | 72.2% | 76.2% |
| Wind | 16.0 km/h | 14.1 km/h | 13.7 km/h |
| Rainy Days | 15.4 | 20.8 | 20.0 |
Seasonal Context
July falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Washington DC in July, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Washington DC in July?
The average temperature in Washington DC during July ranges from 21.4°C (70.5°F) to 31.6°C (88.9°F), with a mean of 26.0°C (78.8°F).
How much does it rain in Washington DC in July?
Washington DC receives an average of 161.6mm of precipitation in July, spread across approximately 20.8 rainy days.
What should I pack for Washington DC in July?
Based on July weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 161.6mm of precipitation.
Is July a good time to visit Washington DC?
July is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Washington DC
Cities with Similar July Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 38.9°, -77.04°. Timezone: America/New_York. Last updated: 2026-07-30.