Mifflin County Climate
Mifflin County, Pennsylvania
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.9°F
Annual Precip
42.1"
Annual Snowfall
26.2"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,165
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Mifflin County
Climate Verdict
Mifflin County has a mild, with an average annual temperature of 51.9°F, moderately wet with 42.1 inches of annual precipitation, rare extreme heat with only 18.1 days above 90°F annually, moderate snowfall of 26.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.0°F. summers are warm — July averages 74.0°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Mifflin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Mifflin County closely matches the Pennsylvania statewide average temperature of 49.8°F, it is somewhat drier than average for Pennsylvania.
Climate Profile
About Mifflin County Weather
A Temperate Climate Above the National Median
Mifflin County maintains an average annual temperature of 51.9°F, placing it slightly above the national median for temperate regions. The local environment is classified as humid continental, characterized by distinct seasonal transitions.
Warmer Than the Pennsylvania Average
The county is warmer than the state average of 49.9°F, ranking as one of the more temperate areas in central Pennsylvania. Its 42.1 inches of annual precipitation is slightly lower than the statewide average of 45.3 inches.
Balanced Weather Compared to Central Neighbors
Mifflin enjoys a milder climate than the high-altitude counties to its north. While it receives 26.2 inches of snow, it remains drier than the state's more mountainous regions.
Hot Summers and Moderate Winters
Residents face 18 days of extreme heat reaching at least 90°F each year. Winters are manageable, with a January average of 29.0°F and total snowfall staying well below the 40-inch mark seen in the northeast.
Preparation for Seasonal Extremes
Homeowners should prioritize efficient HVAC systems to handle the nearly three weeks of extreme summer heat. Standard winterization is sufficient for the 26.2 inches of snow typical of the valley floor.
Frequently Asked Questions
What is the average temperature in Mifflin County?
How much rain does Mifflin County get?
Does it snow in Mifflin County?
How hot does Mifflin County get in summer?
How cold are winters in Mifflin County?
Track your own weather in Mifflin County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.