Middlesex County Climate
Middlesex County, New Jersey
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.7°F
Annual Precip
49.5"
Annual Snowfall
29.0"
Extreme Heat Days
24
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,486
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Middlesex County
Climate Verdict
Middlesex County has a mild, with an average annual temperature of 53.7°F, moderately wet with 49.5 inches of annual precipitation, occasional hot days — 23.6 per year above 90°F, moderate snowfall of 29.0 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.6°F. summers are warm — July averages 76.1°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Middlesex County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Middlesex County closely matches the New Jersey statewide average temperature of 53.6°F.
Climate Profile
About Middlesex County Weather
Slightly warmer than the national median
With an annual average of 53.7°F, Middlesex County is slightly warmer than the typical U.S. county. Its climate is classified as humid subtropical, featuring distinct and active seasons.
Aligning with state-wide averages
Middlesex nearly mirrors the New Jersey average of 53.6°F. This makes its weather patterns highly representative of the state’s central corridor.
Higher snowfall than western neighbors
Middlesex sees 29.0 inches of snow, outpacing Mercer County’s 25.1 inches. It also receives about 3 inches more rain annually than the Mercer region.
Summer peaks and winter freezes
The county endures 24 days of extreme heat each year, typically concentrated in the 76.1°F July period. Winters stay cold with a January average of 31.6°F.
Prepare for significant winter accumulation
Because snowfall approaches 30 inches, residents should prioritize heavy-duty winter tires and salt. Efficient air conditioning is also needed for the 24 days of 90-degree weather.
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.