113 places in Allegheny County, Pennsylvania, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
Allegheny County has 113 places on myweatherrock (80 boroughs, 27 census-designated places, 4 cities, 2 municipality), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 105°F at Donora 1 Sw on July 20, 1930. The coldest night is -22°F at Pittsburgh Asos on January 19, 1994. The wettest day brought 7.35 inches of rain at Braddock Lock 2 on September 18, 2004. The biggest single-day snow measured 23.58 inches at Pittsburgh Asos on March 13, 1993. Those are station measurements from NOAA's daily records, 1905 to 2026, not official state records. By area the largest place is Pittsburgh, about 55 square miles.
About Allegheny County weather
The map on the Now tab shows every Allegheny County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 113 Allegheny County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 22°F. January is the wettest, with rain on about 14 days. January nights run from about 20°F in Allison Park to 23°F in Boston.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
Warnings and alerts: the National Weather Service, passed through unchanged.
Allegheny County weather records
Hottest day
105°F
Donora 1 Sw, July 20, 1930
Coldest night
-22°F
Pittsburgh Asos, January 19, 1994
Wettest day
7.35 in
Braddock Lock 2, September 18, 2004
Biggest snow
23.58 in
Pittsburgh Asos, March 13, 1993
Measured at the NOAA stations serving these towns, daily records 1905 to 2026. Station extremes, not official state records.
Common questions about Allegheny County weather
What is the hottest temperature recorded at a Allegheny County station?
105°F at Donora 1 Sw on July 20, 1930, in the NOAA daily station records myweatherrock holds (1905 to 2026).
What is the coldest temperature recorded at a Allegheny County station?
-22°F at Pittsburgh Asos on January 19, 1994.
What is the most rain a Allegheny County station has measured in one day?
7.35 inches at Braddock Lock 2 on September 18, 2004.
What is the biggest one-day snowfall at a Allegheny County station?
23.58 inches at Pittsburgh Asos on March 13, 1993.
How many Allegheny County towns have a weather page here?
113: 80 boroughs, 27 census-designated places, 4 cities, 2 municipality. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
Where does the Allegheny County forecast come from?
NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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