Pittsburgh, PA Weather
Pittsburgh hourly forecast: next 24 hours
Today's high of 79°F (26°C) is right in line with the typical September high of 77°F (25°C).
Current conditions in detail
Pittsburgh weather tomorrow (Wednesday, September 16)
Tomorrow in Pittsburgh looks patchy rain nearby, with a high of 80° and an overnight low of 66°. There is a 57% chance of rain - plan accordingly. Winds top out near 6 mph, and the UV index reaches 6 (high).
Pittsburgh 14-day forecast
About the weather in Pittsburgh
Pittsburgh runs one of the wider annual swings in our dataset: 24°C separates the average July from the average January. Afternoons reach 84°F (29°C) at the peak of summer and 38°F (3°C) at the depth of winter, with 157 days of measurable precipitation through the year.
Pittsburgh weather: quick facts
- Hottest month: July - highs near 84°F (29°C)
- Coldest month: January - highs near 38°F (3°C)
- Decade extremes (2015-2024): 96°F (36°C) high · -21°F (-29°C) low
- Wettest month: June (16 rainy days) · Sunniest: July (11.4 h sun/day)
- Climate type: humid subtropical
- Annual swing: 24°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 15 days a year
- Months with freezing average lows: 4
- Average humidity: 72%
Temperatures through the year
Snow falls on roughly 15 days a year, mostly November through April. July is the warm end of the year, averaging 84°F (29°C) by day and 66°F (19°C) overnight. January sits at the other end of the year: 38°F (3°C) by day, 23°F (-5°C) at night. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 96°F (36°C) and the lowest daily minimum -21°F (-29°C). June is the wettest month at 6.0 inches (153 mm) over 16 days; November is the driest.
Rain, sun and snow
Overnight lows average at or below freezing for 4 months, December through March. July is the brightest month at 11.4 hours of sun a day, against an annual average of 8.1 - duller than about 81% of the cities we track.
Season by season
Spring (March through May)
Spring in Pittsburgh stays on the cool side of mild, with daytime highs averaging 61°F (16°C) and nights around 42°F (6°C); rain falls on around 44 of the 90 days, plus about 4 snowy days.
Summer (June through August)
Summer in Pittsburgh runs hot, with daytime highs averaging 82°F (28°C) and nights around 64°F (18°C); rain falls on around 44 of the 90 days. Daylight is generous - around 11.2 hours of sun a day.
Fall (September through November)
Fall in Pittsburgh is crisp but comfortable, with daytime highs averaging 65°F (18°C) and nights around 48°F (9°C); rain falls on around 31 of the 90 days.
Winter (December through February)
Winter is chilly here - highs near 42°F (5°C), nights near 26°F (-3°C), and rain falls on around 37 of the 90 days, plus about 11 snowy days.
Average temperatures in Pittsburgh by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 38° | 23° | 13 | 3.8 in | 4.5 h/day | 72% |
| February | 43° | 25° | 12 | 4.1 in | 6.1 h/day | 69% |
| March | 51° | 32° | 14 | 4.4 in | 7.2 h/day | 67% |
| April | 62° | 41° | 15 | 5.0 in | 8.6 h/day | 68% |
| May | 71° | 53° | 15 | 5.1 in | 10.0 h/day | 73% |
| June | 79° | 61° | 16 | 6.0 in | 11.3 h/day | 73% |
| July | 84° | 66° | 15 | 4.6 in | 11.4 h/day | 75% |
| August | 82° | 65° | 14 | 4.4 in | 10.8 h/day | 75% |
| September | 77° | 59° | 11 | 4.2 in | 9.5 h/day | 75% |
| October | 65° | 48° | 11 | 4.1 in | 7.4 h/day | 74% |
| November | 52° | 36° | 10 | 2.9 in | 6.2 h/day | 71% |
| December | 44° | 30° | 12 | 3.7 in | 4.4 h/day | 74% |