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Smithtown, NY weather and climate

Suffolk County, NY · population 24,940 · about 75 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Smithtown'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
30 in
per year
Hot days
11
above 90 °F
Freezing nights
92
at or below 32 °F
Humidity
73%
average relative
Average temperature
53 °F
year round

Monthly temperatures

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

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 39 °FDaily high, Feb: 41 °FDaily high, Mar: 48 °FDaily high, Apr: 59 °FDaily high, May: 69 °FDaily high, Jun: 78 °FDaily high, Jul: 83 °FDaily high, Aug: 82 °FDaily high, Sep: 75 °FDaily high, Oct: 64 °FDaily high, Nov: 53 °FDaily high, Dec: 44 °FDaily low, Jan: 25 °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: 65 °FDaily low, Sep: 59 °FDaily low, Oct: 48 °FDaily low, Nov: 38 °FDaily low, Dec: 30 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high394148596978838275645344
Daily low252632415060666559483830

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovSmithtown, Jan: 3.8 inSmithtown, Feb: 3.5 inSmithtown, Mar: 4.6 inSmithtown, Apr: 3.8 inSmithtown, May: 3.5 inSmithtown, Jun: 3.6 inSmithtown, Jul: 3.3 inSmithtown, Aug: 3.9 inSmithtown, Sep: 3.8 inSmithtown, Oct: 4.4 inSmithtown, Nov: 3.7 inSmithtown, Dec: 4.8 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Smithtown3.83.54.63.83.53.63.33.93.84.43.74.8

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovSmithtown, Jan: 17 daysSmithtown, Feb: 16 daysSmithtown, Mar: 17 daysSmithtown, Apr: 16 daysSmithtown, May: 15 daysSmithtown, Jun: 16 daysSmithtown, Jul: 19 daysSmithtown, Aug: 19 daysSmithtown, Sep: 18 daysSmithtown, Oct: 19 daysSmithtown, Nov: 17 daysSmithtown, Dec: 17 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Smithtown171617161516191918191717

Compare Smithtown 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).