Washington County weather, town by town
18 places in Washington County, Utah, 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 1893 to 2026. Station extremes, not official state records.
Washington County Weather Facts
Washington County has 18 places on myweatherrock (8 cities, 6 towns, 4 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 117°F at St George on July 5, 1985. The coldest night is -20°F at New Harmony on February 7, 1989. The wettest day brought 4.71 inches of rain at New Harmony on February 10, 1978. The biggest single-day snow measured 25.98 inches at New Harmony on January 19, 1955. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is St. George, about 77 square miles.
About Washington County weather
The map on the Now tab shows every Washington 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 18 Washington County towns with station normals, the warmest month is July, when the day usually reaches 95°F, and the coldest is December, when the night usually falls to 27°F. February is the wettest, with rain on about 7 days. July afternoons run from about 76°F in Central to 103°F in Ivins. December nights run from about 21°F in New Harmony to 30°F in Ivins.
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.
Washington County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Washington County weather
- What is the hottest temperature recorded at a Washington County station?
- 117°F at St George on July 5, 1985, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Washington County station?
- -20°F at New Harmony on February 7, 1989.
- What is the most rain a Washington County station has measured in one day?
- 4.71 inches at New Harmony on February 10, 1978.
- What is the biggest one-day snowfall at a Washington County station?
- 25.98 inches at New Harmony on January 19, 1955.
- How many Washington County towns have a weather page here?
- 18: 8 cities, 6 towns, 4 census-designated places. 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 Washington 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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