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Stony Brook University, NY weather and climate

Suffolk County, NY · population 9,138 · about 190 ft elevation

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

The year at a glance

Sunny days
205
clear or partly cloudy, per year
Precipitation
47 in
per year
Wet days
121
rain or snow per year
Snowfall
32 in
per year
Hot days
14
above 90 °F
Freezing nights
90
at or below 32 °F
Humidity
73%
average relative
Average temperature
54 °F
year round

Monthly temperatures

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

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 40 °FDaily high, Feb: 42 °FDaily high, Mar: 49 °FDaily high, Apr: 60 °FDaily high, May: 70 °FDaily high, Jun: 78 °FDaily high, Jul: 83 °FDaily high, Aug: 82 °FDaily high, Sep: 75 °FDaily high, Oct: 64 °FDaily high, Nov: 54 °FDaily high, Dec: 45 °FDaily low, Jan: 26 °FDaily low, Feb: 26 °FDaily low, Mar: 32 °FDaily low, Apr: 41 °FDaily low, May: 50 °FDaily low, Jun: 60 °FDaily low, Jul: 66 °FDaily low, Aug: 66 °FDaily low, Sep: 60 °FDaily low, Oct: 49 °FDaily low, Nov: 39 °FDaily low, Dec: 31 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high404249607078838275645445
Daily low262632415060666660493931

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovStony Brook University, Jan: 3.7 inStony Brook University, Feb: 3.4 inStony Brook University, Mar: 4.6 inStony Brook University, Apr: 3.9 inStony Brook University, May: 3.4 inStony Brook University, Jun: 3.6 inStony Brook University, Jul: 3.2 inStony Brook University, Aug: 4.0 inStony Brook University, Sep: 3.8 inStony Brook University, Oct: 4.4 inStony Brook University, Nov: 3.7 inStony Brook University, Dec: 4.8 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Stony Brook University3.73.44.63.93.43.63.24.03.84.43.74.8

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovStony Brook University, Jan: 17 daysStony Brook University, Feb: 16 daysStony Brook University, Mar: 17 daysStony Brook University, Apr: 16 daysStony Brook University, May: 15 daysStony Brook University, Jun: 16 daysStony Brook University, Jul: 19 daysStony Brook University, Aug: 19 daysStony Brook University, Sep: 18 daysStony Brook University, Oct: 19 daysStony Brook University, Nov: 17 daysStony Brook University, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Stony Brook University171617161516191918191716

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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).