Williamson County weather, town by town
18 places in Williamson County, Texas, 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 1981 to 2026. Station extremes, not official state records.
Williamson County Weather Facts
Williamson County has 18 places on myweatherrock (14 cities, 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 111°F at Georgetown Lake on September 5, 2000. The coldest night is -2°F at Georgetown Lake on December 23, 1989. The wettest day brought 14.57 inches of rain at Georgetown Lake on September 8, 2010. The biggest single-day snow measured 7.01 inches at Georgetown 1.2 W on February 14, 2021. Those are station measurements from NOAA's daily records, 1981 to 2026, not official state records. By area the largest place is Georgetown, about 58 square miles.
About Williamson County weather
The map on the Now tab shows every Williamson 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 Williamson County towns with station normals, the warmest month is August, when the day usually reaches 97°F, and the coldest is January, when the night usually falls to 36°F. March is the wettest, with rain on about 9 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.
Williamson County weather records
Measured at the NOAA stations serving these towns, daily records 1981 to 2026. Station extremes, not official state records.
Common questions about Williamson County weather
- What is the hottest temperature recorded at a Williamson County station?
- 111°F at Georgetown Lake on September 5, 2000, in the NOAA daily station records myweatherrock holds (1981 to 2026).
- What is the coldest temperature recorded at a Williamson County station?
- -2°F at Georgetown Lake on December 23, 1989.
- What is the most rain a Williamson County station has measured in one day?
- 14.57 inches at Georgetown Lake on September 8, 2010.
- What is the biggest one-day snowfall at a Williamson County station?
- 7.01 inches at Georgetown 1.2 W on February 14, 2021.
- How many Williamson County towns have a weather page here?
- 18: 14 cities, 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 Williamson 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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