Sullivan County weather, town by town
41 places in Sullivan County, New York, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1880 to 2026. Station extremes, not official state records.
Sullivan County Weather Facts
Sullivan County has 41 places on myweatherrock (22 census-designated places, 14 towns, 5 villages), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 107°F at Prompton Dam on July 28, 1973. The coldest night is -26°F at Port Jervis on January 14, 1912. The wettest day brought 7.36 inches of rain at Port Jervis on October 9, 1903. The biggest single-day snow measured 32.01 inches at Liberty 1 Ne on February 16, 1958. Those are station measurements from NOAA's daily records, 1880 to 2026, not official state records. By area the largest place is Mamakating, about 96 square miles.
About Sullivan County weather
The map on the Now tab shows every Sullivan 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 41 Sullivan County towns with station normals, the warmest month is July, when the day usually reaches 81°F, and the coldest is January, when the night usually falls to 15°F. May is the wettest, with rain on about 13 days. July afternoons run from about 79°F in Bethel to 85°F in Barryville. January nights run from about 13°F in Roscoe to 18°F in Bloomingburg.
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.
Sullivan County weather records
Measured at the NOAA stations serving these towns, daily records 1880 to 2026. Station extremes, not official state records.
Common questions about Sullivan County weather
- What is the hottest temperature recorded at a Sullivan County station?
- 107°F at Prompton Dam on July 28, 1973, in the NOAA daily station records myweatherrock holds (1880 to 2026).
- What is the coldest temperature recorded at a Sullivan County station?
- -26°F at Port Jervis on January 14, 1912.
- What is the most rain a Sullivan County station has measured in one day?
- 7.36 inches at Port Jervis on October 9, 1903.
- What is the biggest one-day snowfall at a Sullivan County station?
- 32.01 inches at Liberty 1 Ne on February 16, 1958.
- How many Sullivan County towns have a weather page here?
- 41: 22 census-designated places, 14 towns, 5 villages. 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 Sullivan 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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