Dauphin County Climate
Dauphin County, Pennsylvania
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.3°F
Annual Precip
46.8"
Annual Snowfall
27.1"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,252
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dauphin County
Climate Verdict
Dauphin County has a mild, with an average annual temperature of 52.3°F, moderately wet with 46.8 inches of annual precipitation, rare extreme heat with only 18.133333333333336 days above 90°F annually, moderate snowfall of 27.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.5°F. summers are warm — July averages 74.7°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Dauphin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Dauphin County closely matches the Pennsylvania statewide average temperature of 49.8°F.
Climate Profile
About Dauphin County Weather
Temperate valley weather patterns
Dauphin County averages 52.3°F annually, aligning it with the warmer half of the continental United States. It features a humid subtropical influence that brings hot summers and variable winters.
Warmer than the state median
Dauphin’s average temperature is over two degrees higher than the Pennsylvania state average of 49.9°F. It ranks as one of the warmer urban corridors in the Commonwealth.
Similar to its valley peers
Dauphin mirrors Cumberland County’s 52.3°F average, though it receives slightly more precipitation at 46.8 inches. It is significantly warmer and less snowy than Columbia County to its north.
Significant heat and light snow
Summers are hot with 18 extreme heat days and a July average of 74.7°F. Winters are relatively light on snow, averaging only 27.1 inches per year.
Ready for summer humidity
High summer temperatures and 46.8 inches of annual rain create humid conditions that require reliable HVAC systems. Residents enjoy a shorter, milder winter season compared to northern Pennsylvania.
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.