Armstrong County Climate
Armstrong County, Pennsylvania
Avg Annual Temp
50.0°F
Annual Precip
44.9"
Annual Snowfall
38.4"
Extreme Heat Days
16.599999999999998
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Armstrong County Weather
A classic continental climate profile
Armstrong County’s annual average temperature of 50.0°F is roughly four degrees cooler than the national median. It experiences a moist climate with 44.9 inches of annual precipitation, very close to the state average. These conditions foster a landscape defined by lush forests and significant winter snow accumulation.
The definition of Pennsylvania average
Armstrong County is a near-perfect match for the state’s climate profile, with its 50.0°F average temperature almost identical to the state's 49.9°F. Its 44.9 inches of precipitation also mirrors the Pennsylvania average of 45.3 inches. Residents here experience the quintessential Pennsylvania weather cycle without the extremes of the mountains or the coast.
Cooler and wetter than Pittsburgh
Compared to neighboring Allegheny County, Armstrong is nearly two degrees cooler and notably snowier. It receives 38.4 inches of snow annually, which is over 6 inches more than its neighbors to the southwest. This makes the county a prime spot for winter activities but necessitates better cold-weather preparation.
Sharp winters and peak summer heat
Winters are cold with a January average of 26.7°F and a significant 38.4-inch snowfall total. Despite the cold winters, the county still sees 17 days of extreme heat above 90°F during the summer months. This wide variance results in a winter average of 29.3°F and a summer peak of 69.9°F.
Gear up for heavy winter snow
With nearly 40 inches of annual snow, high-quality snow blowers and winter tires are essential for local residents. The 17 days of 90°F heat mean that while winters are the main concern, cooling systems are still necessary for summer comfort. Homeowners should focus on heavy-duty insulation to handle the January lows of 26.7°F.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.