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Trenton, NJ weather and climate

Mercer County, NJ · population 89,966 · about 59 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Trenton's own coordinates.

The year at a glance

Sunny days
200
clear or partly cloudy, per year
Precipitation
44 in
per year
Wet days
121
rain or snow per year
Snowfall
25 in
per year
Hot days
22
above 90 °F
Freezing nights
102
at or below 32 °F
Humidity
69%
average relative
Average temperature
54 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 40 °FDaily high, Feb: 43 °FDaily high, Mar: 51 °FDaily high, Apr: 63 °FDaily high, May: 73 °FDaily high, Jun: 81 °FDaily high, Jul: 86 °FDaily high, Aug: 84 °FDaily high, Sep: 77 °FDaily high, Oct: 66 °FDaily high, Nov: 55 °FDaily high, Dec: 45 °FDaily low, Jan: 24 °FDaily low, Feb: 25 °FDaily low, Mar: 32 °FDaily low, Apr: 41 °FDaily low, May: 51 °FDaily low, Jun: 60 °FDaily low, Jul: 66 °FDaily low, Aug: 64 °FDaily low, Sep: 57 °FDaily low, Oct: 45 °FDaily low, Nov: 35 °FDaily low, Dec: 28 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high404351637381868477665545
Daily low242532415160666457453528

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovTrenton, Jan: 3.3 inTrenton, Feb: 3.0 inTrenton, Mar: 4.2 inTrenton, Apr: 3.6 inTrenton, May: 3.5 inTrenton, Jun: 4.0 inTrenton, Jul: 4.2 inTrenton, Aug: 4.0 inTrenton, Sep: 4.0 inTrenton, Oct: 3.6 inTrenton, Nov: 2.9 inTrenton, Dec: 4.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Trenton3.33.04.23.63.54.04.24.04.03.62.94.0

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovTrenton, Jan: 17 daysTrenton, Feb: 15 daysTrenton, Mar: 16 daysTrenton, Apr: 15 daysTrenton, May: 15 daysTrenton, Jun: 16 daysTrenton, Jul: 18 daysTrenton, Aug: 18 daysTrenton, Sep: 18 daysTrenton, Oct: 19 daysTrenton, Nov: 17 daysTrenton, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Trenton171516151516181818191716

Compare Trenton with another city

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About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).