Somerset County Climate
Somerset County, New Jersey
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.8°F
Annual Precip
47.3"
Annual Snowfall
21.0"
Extreme Heat Days
20
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,089
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Somerset County
Climate Verdict
Somerset County has a mild, with an average annual temperature of 51.8°F, moderately wet with 47.3 inches of annual precipitation, rare extreme heat with only 19.799999999999997 days above 90°F annually, moderate snowfall of 21.0 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.4°F. summers are warm — July averages 74.2°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Somerset County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Somerset County closely matches the New Jersey statewide average temperature of 53.6°F.
Climate Profile
About Somerset County Weather
A Balanced Four-Season Climate
Somerset County's annual average temperature of 51.8°F sits just below the national median for temperate zones. It experiences the classic transition of seasons typical of the American Northeast.
Cooler than the Jersey Average
The county's 51.8°F average is nearly two degrees cooler than the New Jersey state average of 53.6°F. This difference reflects Somerset's position away from the warming influence of the southern coast.
A Middle Ground in Central Jersey
Somerset is warmer than rugged Sussex but cooler than coastal Union County. It averages 21.0 inches of snow annually, representing a midpoint between the snowy north and the milder south.
Cold Januaries and Hot Julys
January temperatures average 29.4°F, frequently dipping below freezing for extended periods. Summer brings 20 days of extreme heat above 90°F, making for a July average of 74.2°F.
Prepare for Ice and Humidity
Homeowners should ensure insulation is ready for the 21 inches of annual snowfall and freezing January nights. Dual-purpose HVAC units are essential to handle both the winter chill and the 20 days of summer heat spikes.
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.