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Port Jefferson Station, NY weather and climate

Suffolk County, NY · population 7,605 · about 210 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Port Jefferson Station'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
12
above 90 °F
Freezing nights
86
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: 62 °FDaily high, May: 71 °FDaily high, Jun: 78 °FDaily high, Jul: 83 °FDaily high, Aug: 82 °FDaily high, Sep: 75 °FDaily high, Oct: 64 °FDaily high, Nov: 55 °FDaily high, Dec: 46 °FDaily low, Jan: 26 °FDaily low, Feb: 27 °FDaily low, Mar: 32 °FDaily low, Apr: 42 °FDaily low, May: 51 °FDaily low, Jun: 61 °FDaily low, Jul: 67 °FDaily low, Aug: 66 °FDaily low, Sep: 60 °FDaily low, Oct: 49 °FDaily low, Nov: 40 °FDaily low, Dec: 32 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high404249627178838275645546
Daily low262732425161676660494032

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovPort Jefferson Station, Jan: 3.7 inPort Jefferson Station, Feb: 3.4 inPort Jefferson Station, Mar: 4.6 inPort Jefferson Station, Apr: 3.9 inPort Jefferson Station, May: 3.4 inPort Jefferson Station, Jun: 3.6 inPort Jefferson Station, Jul: 3.2 inPort Jefferson Station, Aug: 4.0 inPort Jefferson Station, Sep: 3.8 inPort Jefferson Station, Oct: 4.4 inPort Jefferson Station, Nov: 3.7 inPort Jefferson Station, Dec: 4.8 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Port Jefferson Station3.73.44.63.93.43.63.24.03.84.43.74.8

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovPort Jefferson Station, Jan: 17 daysPort Jefferson Station, Feb: 16 daysPort Jefferson Station, Mar: 17 daysPort Jefferson Station, Apr: 16 daysPort Jefferson Station, May: 15 daysPort Jefferson Station, Jun: 16 daysPort Jefferson Station, Jul: 19 daysPort Jefferson Station, Aug: 19 daysPort Jefferson Station, Sep: 18 daysPort Jefferson Station, Oct: 19 daysPort Jefferson Station, Nov: 17 daysPort Jefferson Station, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Port Jefferson Station171617161516191918191716

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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).