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Pittsburgh Weather by Month
Average temperatures, rainfall and humidity for Pittsburgh, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Pittsburgh month looks like before you travel — then check the live Pittsburgh forecast for the days ahead.
Warmest month
July
29°C average high
Coolest month
January
-5°C average low
Wettest month
June
105 mm of rain
Driest month
February
45 mm of rain
Average temperature and rainfall in Pittsburgh by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 3°C | -5°C | -24°C / 21°C | 45 mm | 76% | 13 km/h |
| February | 6°C | -4°C | -24°C / 25°C | 45 mm | 72% | 13 km/h |
| March | 11°C | 1°C | -19°C / 29°C | 66 mm | 65% | 14 km/h |
| April | 18°C | 6°C | -8°C / 30°C | 78 mm | 63% | 13 km/h |
| May | 22°C | 12°C | -2°C / 32°C | 75 mm | 70% | 11 km/h |
| June | 26°C | 16°C | 5°C / 35°C | 105 mm | 74% | 9 km/h |
| July | 29°C | 19°C | 9°C / 35°C | 76 mm | 75% | 8 km/h |
| August | 27°C | 17°C | 8°C / 35°C | 63 mm | 77% | 8 km/h |
| September | 25°C | 14°C | 4°C / 34°C | 63 mm | 76% | 8 km/h |
| October | 18°C | 9°C | -3°C / 31°C | 72 mm | 75% | 10 km/h |
| November | 11°C | 2°C | -12°C / 27°C | 52 mm | 70% | 12 km/h |
| December | 6°C | -1°C | -19°C / 20°C | 58 mm | 77% | 12 km/h |
Best time to visit Pittsburgh
The most comfortable time to visit Pittsburgh is generally May and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 797 mm a year.
Travellers who prefer heat should aim for July, when highs average 29°C. June is the month to avoid if rain would spoil your plans — it averages 105 mm, roughly 2× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Pittsburgh forecast for what is happening now.