Suffolk County has 155 places on myweatherrock (117 census-designated places, 28 villages, 10 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 104°F at Islip-Li Macarthur Ap on July 3, 1966. The coldest night is -15°F at Westhampton Gabreski Ap on January 17, 2009. The wettest day brought 13.51 inches of rain at Islip-Li Macarthur Ap on August 13, 2014. The biggest single-day snow measured 30.32 inches at Upton Coop - Nwsfo New York on February 9, 2013. Those are station measurements from NOAA's daily records, 1930 to 2026, not official state records. By area the largest place is Brookhaven, about 260 square miles.
About Suffolk County weather
The map on the Now tab shows every Suffolk County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 155 Suffolk County towns with station normals, the warmest month is July, when the day usually reaches 83°F, and the coldest is January, when the night usually falls to 24°F. May is the wettest, with rain on about 12 days. July afternoons run from about 80°F in East Hampton to 84°F in Aquebogue. January nights run from about 20°F in East Quogue to 28°F in East Hampton.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
Warnings and alerts: the National Weather Service, passed through unchanged.
Suffolk County weather records
Hottest day
104°F
Islip-Li Macarthur Ap, July 3, 1966
Coldest night
-15°F
Westhampton Gabreski Ap, January 17, 2009
Wettest day
13.51 in
Islip-Li Macarthur Ap, August 13, 2014
Biggest snow
30.32 in
Upton Coop - Nwsfo New York, February 9, 2013
Measured at the NOAA stations serving these towns, daily records 1930 to 2026. Station extremes, not official state records.
Common questions about Suffolk County weather
What is the hottest temperature recorded at a Suffolk County station?
104°F at Islip-Li Macarthur Ap on July 3, 1966, in the NOAA daily station records myweatherrock holds (1930 to 2026).
What is the coldest temperature recorded at a Suffolk County station?
-15°F at Westhampton Gabreski Ap on January 17, 2009.
What is the most rain a Suffolk County station has measured in one day?
13.51 inches at Islip-Li Macarthur Ap on August 13, 2014.
What is the biggest one-day snowfall at a Suffolk County station?
30.32 inches at Upton Coop - Nwsfo New York on February 9, 2013.
How many Suffolk County towns have a weather page here?
155: 117 census-designated places, 28 villages, 10 towns. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
Where does the Suffolk County forecast come from?
NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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