Westmoreland County Climate
Westmoreland County, Pennsylvania
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.5°F
Annual Precip
45.7"
Annual Snowfall
29.2"
Extreme Heat Days
9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
2,865
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Westmoreland County
Climate Verdict
Westmoreland County has a mild, with an average annual temperature of 50.5°F, moderately wet with 45.7 inches of annual precipitation, rare extreme heat with only 9.042857142857143 days above 90°F annually, moderate snowfall of 29.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.2°F. summers are warm — July averages 71.4°F. The 43°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Westmoreland County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Westmoreland County closely matches the Pennsylvania statewide average temperature of 49.8°F.
Climate Profile
About Westmoreland County Weather
Balanced temperatures in the Laurel Highlands
Westmoreland County averages 50.5°F annually, falling about 3.5 degrees below the national median. It serves as a transition zone between the warmer Ohio Valley and the cooler Appalachian ridges.
Mirroring the Pennsylvania state average
The county’s 50.5°F average is very close to the Pennsylvania state average of 49.9°F. This makes Westmoreland a representative example of the state's overall climate profile.
Typical precipitation for Western Pennsylvania
With 45.7 inches of annual precipitation, Westmoreland is almost exactly in line with the state average of 45.3 inches. It is slightly cooler than neighboring Washington County, which averages 51.8°F.
Consistent snow and warm July afternoons
Winters bring 29.2 inches of snow and a January average of 28.2°F. July is warm and occasionally humid, averaging 71.4°F with roughly 9 days each year hitting 90°F or higher.
Preparing for four distinct seasons
Residents need a versatile wardrobe and home systems to handle both sub-freezing winters and 90-degree summer spikes. The 29 inches of snow require reliable removal tools, but the totals are manageable compared to the state's northern tier.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.