Morris County Climate
Morris County, New Jersey
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.8°F
Annual Precip
50.6"
Annual Snowfall
28.9"
Extreme Heat Days
16
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,151
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Morris County
Climate Verdict
Morris County has a mild, with an average annual temperature of 51.8°F, moderately wet with 50.6 inches of annual precipitation, rare extreme heat with only 16.2 days above 90°F annually, moderate snowfall of 28.9 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.1°F. summers are warm — July averages 74.7°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Morris County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Morris County closely matches the New Jersey statewide average temperature of 53.6°F, it is somewhat wetter than average for New Jersey.
Climate Profile
About Morris County Weather
Cooler conditions in the highlands
Morris County’s annual average of 51.8°F falls below the national median. It features a more temperate climate with shorter, less intense summer heat waves.
One of New Jersey’s cooler regions
The county is significantly cooler than the New Jersey average of 53.6°F. Its inland location and varied topography keep temperatures lower than the coastal counties.
High snowfall among its peers
With 28.9 inches of annual snow, Morris is much whiter in winter than Hunterdon, which sees only 21.5 inches. It also maintains a higher average precipitation of 50.6 inches.
Cold winters and mild summers
Morris records only 16 extreme heat days per year, among the lowest in the state. January is cold, averaging 29.1°F, which supports its higher snowfall totals.
Prioritize heating and snow removal
Residents should invest in high-efficiency heating systems for the sub-30-degree January nights. Snowblowers are a standard necessity for the nearly 29 inches of winter accumulation.
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.