Climate averages 1991–2020
Germantown weather
in August.
A hot, moderately wet month: the 2nd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Germantown: daytime highs average 29.0°C and nights cool to about 19.6°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 85 mm of rain on roughly 10 days, which makes August a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 42 min on an average August day.
The nearest other city in this atlas is Silver Spring (29 km away). In August its highs average 29.1°C, about as warm as Germantown, with 89 mm of rain.
Among the 498 cities listed in the United States, Germantown ranks joint 286th of 498 for the warmest August highs and joint 291st of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Germantown is 0.9°C cooler than that mean.
From August to September, average highs fall by 4.0°C to 25.1°C, and monthly rainfall rises from 85 mm to 113 mm.
The annual picture
August 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 | 30.1°C20.4°C | 20.4°C | 102 | 11.2 | 14.615 h |
| August, selected | 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
August in nearby cities
- Silver Spring in AugustUnited States · 29 kmHigh 29.1°C · Low 20.1°C · 89 mm rain
- Arlington (Virginia), United States in AugustUnited States · 36 kmHigh 29.3°C · Low 20.1°C · 89 mm rain
- Washington in AugustUnited States · 37 kmHigh 29.8°C · Low 20.6°C · 89 mm rain
- Columbia (Maryland), United States in AugustUnited States · 38 kmHigh 28.4°C · Low 20.2°C · 95 mm rain
- Centreville in AugustUnited States · 39 kmHigh 29.3°C · Low 20.4°C · 84 mm rain
- Alexandria, United States in AugustUnited States · 45 kmHigh 29.5°C · Low 20.7°C · 89 mm rain
- Baltimore in AugustUnited States · 58 kmHigh 28.6°C · Low 20.2°C · 93 mm rain
- Wilmington (Delaware), United States in AugustUnited States · 161 kmHigh 28.2°C · Low 19.9°C · 100 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.