Blair, PA Weather Forecast
Blair County, Pennsylvania
Seven-day outlook
35–72°F across the weekThe week runs between 37° and 72°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Every day in the outlook stays dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Blair forecast
Blair sits at 40.3993°N, 78.4097°W in Blair County, Pennsylvania. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Blair County
- Coordinates
- 40.3993°N, 78.4097°W
- Population
- 4,676 · 2023 estimate
- Land area
- 13.623 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Blair, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Blair?
The nearest Doppler radar is KCCX (State College, PA), 42 miles to the NNE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Blair its center is about 2,800 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Blair to show rotation in the part of a storm where tornadoes actually form. Blair is closer to its radar than 53% of US cities.
The closest instrument actually measuring the air is KAOO · Altoona/Blair Cnty on the ASOS/AWOS network, 8.4 miles away. Near enough to be representative on most days, though a summer thunderstorm can soak one and miss the other entirely.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Pennsylvania observing network as of this build.
Forecasts near Blair
- Hollidaysburg, PA2 mi
- Freedom, PA4 mi
- Allegheny, PA5 mi
- Frankstown, PA7 mi
- Altoona, PA8 mi
- Greenfield, PA8 mi
- Logan, PA9 mi
- Antis, PA17 mi
Elsewhere in Pennsylvania
PhiladelphiaPittsburghAllentownReadingErieUpper DarbyAll Pennsylvania forecasts →