Sussex County weather, town by town
17 places in Sussex County, New Jersey, 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 1998 to 2025. Station extremes, not official state records.
Sussex County Weather Facts
Sussex County has 17 places on myweatherrock (8 boroughs, 8 census-designated places, 1 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 101°F at Aeroflex-Andover Ap on July 22, 2011. The coldest night is -16°F at Sussex Ap on February 24, 2015. The wettest day brought 8.59 inches of rain at Aeroflex-Andover Ap on October 8, 2005. The biggest single-day snow measured 25.98 inches at Canistear Rsvr on February 12, 1983. Those are station measurements from NOAA's daily records, 1998 to 2025, not official state records. By area the largest place is Hopatcong, about 11 square miles.
About Sussex County weather
The map on the Now tab shows every Sussex 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 17 Sussex County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 18°F. August is the wettest, with rain on about 14 days.
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.
Sussex County weather records
Measured at the NOAA stations serving these towns, daily records 1998 to 2025. Station extremes, not official state records.
Common questions about Sussex County weather
- What is the hottest temperature recorded at a Sussex County station?
- 101°F at Aeroflex-Andover Ap on July 22, 2011, in the NOAA daily station records myweatherrock holds (1998 to 2025).
- What is the coldest temperature recorded at a Sussex County station?
- -16°F at Sussex Ap on February 24, 2015.
- What is the most rain a Sussex County station has measured in one day?
- 8.59 inches at Aeroflex-Andover Ap on October 8, 2005.
- What is the biggest one-day snowfall at a Sussex County station?
- 25.98 inches at Canistear Rsvr on February 12, 1983.
- How many Sussex County towns have a weather page here?
- 17: 8 boroughs, 8 census-designated places, 1 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 Sussex 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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