Climate averages 1991–2020
Germantown weather
in July.
A hot, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Germantown: daytime highs average 30.1°C and nights cool to about 20.4°C. By daytime temperature it is the warmest month of the year.
Expect about 102 mm of rain on roughly 11 days, which makes July a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 38 min on an average July day.
The nearest other city in this atlas is Silver Spring (29 km away). In July its highs average 30.3°C, about as warm as Germantown, with 103 mm of rain.
Among the 498 cities listed in the United States, Germantown ranks joint 260th of 498 for the warmest July highs and joint 391st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Germantown is 0.2°C cooler than that mean.
From July to August, average highs fall by 1.1°C to 29.0°C, and monthly rainfall falls from 102 mm to 85 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Germantown climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.7°C-3.1°C | -3.1°C | 78 | 8.6 | 9.810 h |
| February | 6.6°C-2.5°C | -2.5°C | 71 | 8.4 | 10.711 h |
| March | 11.2°C1.2°C | 1.2°C | 97 | 10.2 | 11.912 h |
| April | 17.7°C6.8°C | 6.8°C | 87 | 10.4 | 13.213 h |
| May | 22.6°C12.5°C | 12.5°C | 97 | 11.5 | 14.314 h |
| June | 27.6°C17.6°C | 17.6°C | 90 | 10.8 | 14.915 h |
| July, selected | 30.1°C20.4°C | 20.4°C | 102 | 11.2 | 14.615 h |
| August | 29.0°C19.6°C | 19.6°C | 85 | 10.4 | 13.714 h |
| September | 25.1°C16.0°C | 16.0°C | 113 | 9.3 | 12.512 h |
| October | 18.6°C9.7°C | 9.7°C | 87 | 7.8 | 11.211 h |
| November | 12.1°C3.9°C | 3.9°C | 76 | 7.7 | 10.110 h |
| December | 6.8°C-0.6°C | -0.6°C | 89 | 8.8 | 9.59 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Silver Spring in JulyUnited States · 29 kmHigh 30.3°C · Low 20.9°C · 103 mm rain
- Arlington (Virginia), United States in JulyUnited States · 36 kmHigh 30.5°C · Low 20.9°C · 103 mm rain
- Washington in JulyUnited States · 37 kmHigh 31.1°C · Low 21.4°C · 103 mm rain
- Columbia (Maryland), United States in JulyUnited States · 38 kmHigh 29.5°C · Low 20.9°C · 108 mm rain
- Centreville in JulyUnited States · 39 kmHigh 30.5°C · Low 21.2°C · 94 mm rain
- Alexandria, United States in JulyUnited States · 45 kmHigh 30.7°C · Low 21.6°C · 96 mm rain
- Baltimore in JulyUnited States · 58 kmHigh 29.6°C · Low 21.0°C · 97 mm rain
- Wilmington (Delaware), United States in JulyUnited States · 161 kmHigh 29.3°C · Low 20.7°C · 99 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Germantown) is explained once on the Germantown year overview and on the Sources, method and limits page.