Franklin County Climate
Franklin County, Pennsylvania
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.5°F
Annual Precip
46.0"
Annual Snowfall
31.9"
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,053
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Franklin County
Climate Verdict
Franklin County has a mild, with an average annual temperature of 51.5°F, moderately wet with 46.0 inches of annual precipitation, rare extreme heat with only 10.9 days above 90°F annually, moderate snowfall of 31.9 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.1°F. summers are warm — July averages 72.9°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Franklin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Franklin County closely matches the Pennsylvania statewide average temperature of 49.8°F.
Climate Profile
About Franklin County Weather
Approaching National Medians
With an annual average of 51.5°F, Franklin County sits closer to the national median than many of its northern neighbors. This reflects a transition toward the warmer humid subtropical influences of the south.
One of the State's Warmest
Franklin is one of Pennsylvania's warmer counties, exceeding the state average of 49.9°F by 1.6 degrees. Its 46.0 inches of precipitation remains very close to the state-wide norms.
Regional Heat Leader
Franklin shares its 51.5°F average with Greene County, making them some of the warmest spots in the region. It stays much milder than Jefferson, which is nearly 4 degrees colder on average.
Warm Summers and Light Snow
Summers are notably warm with 11 days exceeding 90°F and a July average of 72.9°F. Winters are relatively light, seeing only 31.9 inches of snow compared to the state's northern averages.
Cooling for Humid Summers
Prioritize energy-efficient air conditioning to manage the double-digit extreme heat days. Standard winter kits suffice for the moderate snowfall, but residents should prepare for high summer humidity.
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.