Blair County has 93 places on myweatherrock (84 census-designated places, 8 boroughs, 1 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 103°F at Altoona Blair Co Ap on July 22, 2011. The coldest night is -28°F at Prince Gallitzin Sp on January 21, 1994. The wettest day brought 8.88 inches of rain at Williamsburg on May 12, 1943. The biggest single-day snow measured 19.02 inches at Tyrone on March 3, 1994. Those are station measurements from NOAA's daily records, 1949 to 2026, not official state records. By area the largest place is Altoona, about 10 square miles.
About Blair County weather
The map on the Now tab shows every Blair 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 93 Blair County towns with station normals, the warmest month is July, when the day usually reaches 82°F, and the coldest is January, when the night usually falls to 20°F. May is the wettest, with rain on about 15 days. January nights run from about 16°F in Bald Eagle to 21°F in Beavertown.
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.
Blair County weather records
Hottest day
103°F
Altoona Blair Co Ap, July 22, 2011
Coldest night
-28°F
Prince Gallitzin Sp, January 21, 1994
Wettest day
8.88 in
Williamsburg, May 12, 1943
Biggest snow
19.02 in
Tyrone, March 3, 1994
Measured at the NOAA stations serving these towns, daily records 1949 to 2026. Station extremes, not official state records.
Common questions about Blair County weather
What is the hottest temperature recorded at a Blair County station?
103°F at Altoona Blair Co Ap on July 22, 2011, in the NOAA daily station records myweatherrock holds (1949 to 2026).
What is the coldest temperature recorded at a Blair County station?
-28°F at Prince Gallitzin Sp on January 21, 1994.
What is the most rain a Blair County station has measured in one day?
8.88 inches at Williamsburg on May 12, 1943.
What is the biggest one-day snowfall at a Blair County station?
19.02 inches at Tyrone on March 3, 1994.
How many Blair County towns have a weather page here?
93: 84 census-designated places, 8 boroughs, 1 cities. 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 Blair 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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