Pittsburgh Climate by Month
Pittsburgh, Pennsylvania, United States
Hot summers and cold winters, with rain spread through the year.
Pittsburgh has hot summers and cold winters, with rain spread through the year. Afternoon highs range from 39°F (4°C) in January to 87°F (30°C) in July, and January nights average 22°F (-6°C). About 38 in (977 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 87°F(30°C)
- Average high, July
- Coldest nights
- 22°F(-6°C)
- Average low, January
- Rain per year
- 38 in(977 mm)
- No clear rainy season
- Humidity
- 65%
- Sunniest: July
Best and worst months in Pittsburgh
Best for weatherMay and September are the best time for weather in Pittsburgh: highs near 78°F (25°C) and about 3.6 in (92 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 39°F (4°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Pittsburgh weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 39°F(4°C) | 22°F(-6°C) | 2.7 in(69 mm) | 69% | 1.5 |
| FebFebruary | 43°F(6°C) | 24°F(-5°C) | 2.4 in(62 mm) | 62% | 2.4 |
| MarMarch | 53°F(11°C) | 30°F(-1°C) | 3.3 in(84 mm) | 68% | 3.4 |
| AprApril | 65°F(18°C) | 40°F(4°C) | 3.5 in(90 mm) | 59% | 4.5 |
| MayMayBest | 76°F(24°C) | 51°F(10°C) | 4.1 in(104 mm) | 61% | 5.2 |
| JunJune | 83°F(29°C) | 59°F(15°C) | 4.2 in(107 mm) | 65% | 5.5 |
| JulJuly | 87°F(30°C) | 63°F(17°C) | 3.7 in(93 mm) | 68% | 5.7 |
| AugAugust | 85°F(30°C) | 62°F(17°C) | 3.1 in(80 mm) | 67% | 5.1 |
| SepSeptemberBest | 80°F(26°C) | 55°F(13°C) | 3.1 in(80 mm) | 66% | 4.2 |
| OctOctober | 67°F(20°C) | 44°F(7°C) | 2.8 in(72 mm) | 67% | 2.8 |
| NovNovember | 54°F(12°C) | 34°F(1°C) | 2.6 in(66 mm) | 61% | 1.8 |
| DecDecember | 43°F(6°C) | 27°F(-3°C) | 2.8 in(70 mm) | 72% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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