Warren County Climate
Warren County, New Jersey
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.1°F
Annual Precip
49.6"
Annual Snowfall
23.3"
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,002
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Warren County
Climate Verdict
Warren County has a mild, with an average annual temperature of 51.1°F, moderately wet with 49.6 inches of annual precipitation, rare extreme heat with only 17.3 days above 90°F annually, moderate snowfall of 23.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.5°F. summers are warm — July averages 73.5°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Warren County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Warren County closely matches the New Jersey statewide average temperature of 53.6°F.
Climate Profile
About Warren County Weather
Cool Temps and High Precipitation
Warren County averages 51.1°F annually, placing it slightly below the national median for temperature. It stands out for its high moisture levels, receiving nearly 50 inches of precipitation every year.
The State's Wettest Corner
With 49.6 inches of annual precipitation, Warren is wetter than the New Jersey average of 48.1 inches. Its 51.1°F average temperature makes it one of the cooler counties in the state.
Damp and Cool Compared to Union
Warren is much cooler than neighboring Union County, averaging 51.1°F compared to Union's 55.0°F. It also manages more snowfall, recording 23.3 inches compared to the lower levels found in southern NJ.
Chilly Winters and Mild Summers
Extreme heat is limited to just 17 days a year, keeping summer averages at a comfortable 71.3°F. Winter brings a sharp chill, with January temperatures averaging 28.5°F.
Prepare for Rain and Ice
The primary challenge here is the 49.6 inches of annual precipitation, requiring excellent drainage and waterproof gear. Homeowners should also prepare for 23 inches of snow and the potential for icy winter mornings.
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.