Morris County Climate
Morris County, New Jersey
Avg Annual Temp
51.8°F
Annual Precip
50.6"
Annual Snowfall
28.9"
Extreme Heat Days
16.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.