Climate averages 1991–2020
Pittsburgh weather
in August.
A warm, wet month: the 2nd warmest and the joint 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Pittsburgh: daytime highs average 27.5°C and nights cool to about 17.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 93 mm of rain on roughly 12 days, which makes August a wet month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 47 min on an average August day.
The nearest other city in this atlas is Canton (Ohio), United States (123 km away). In August its highs average 26.7°C, 0.8°C cooler than Pittsburgh, with 81 mm of rain.
Among the 498 cities listed in the United States, Pittsburgh ranks joint 355th of 498 for the warmest August highs and joint 338th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Pittsburgh is 2.4°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 23.9°C, and monthly rainfall rises from 93 mm to 101 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
Pittsburgh climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.8°C-5.5°C | -5.5°C | 92 | 12.0 | 9.610 h |
| February | 4.8°C-4.7°C | -4.7°C | 80 | 10.9 | 10.611 h |
| March | 9.9°C-0.5°C | -0.5°C | 108 | 12.9 | 11.912 h |
| April | 16.6°C5.5°C | 5.5°C | 119 | 13.8 | 13.313 h |
| May | 21.6°C11.3°C | 11.3°C | 123 | 14.3 | 14.414 h |
| June | 26.0°C16.2°C | 16.2°C | 126 | 13.6 | 15.015 h |
| July | 28.2°C18.6°C | 18.6°C | 116 | 14.0 | 14.815 h |
| August, selected | 27.5°C17.9°C | 17.9°C | 93 | 11.9 | 13.814 h |
| September | 23.9°C14.4°C | 14.4°C | 101 | 10.4 | 12.513 h |
| October | 17.4°C8.4°C | 8.4°C | 93 | 10.7 | 11.211 h |
| November | 10.6°C2.6°C | 2.6°C | 88 | 10.0 | 10.010 h |
| December | 5.1°C-2.1°C | -2.1°C | 89 | 11.6 | 9.39 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
- Canton (Ohio), United States in AugustUnited States · 123 kmHigh 26.7°C · Low 17.6°C · 81 mm rain
- Akron in AugustUnited States · 147 kmHigh 26.6°C · Low 17.6°C · 84 mm rain
- Parma, United States in AugustUnited States · 180 kmHigh 25.9°C · Low 18.4°C · 88 mm rain
- Cleveland in AugustUnited States · 185 kmHigh 25.8°C · Low 18.9°C · 88 mm rain
- Erie in AugustUnited States · 188 kmHigh 24.6°C · Low 19.1°C · 111 mm rain
- Columbus in AugustUnited States · 261 kmHigh 27.8°C · Low 18.3°C · 73 mm rain
- Germantown in AugustUnited States · 272 kmHigh 29.0°C · Low 19.6°C · 85 mm rain
- Centreville in AugustUnited States · 283 kmHigh 29.3°C · Low 20.4°C · 84 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 Pittsburgh) is explained once on the Pittsburgh year overview and on the Sources, method and limits page.