Collin County weather, town by town
25 places in Collin 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 1900 to 2026. Station extremes, not official state records.
Collin County Weather Facts
Collin County has 25 places on myweatherrock (19 cities, 4 towns, 2 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 118°F at Mckinney Muni Ap on August 10, 1936. The coldest night is -7°F at Mckinney Muni Ap on January 18, 1930. The wettest day brought 12.1 inches of rain at Mckinney Muni Ap on September 21, 1964. The biggest single-day snow measured 8.5 inches at Richardson 2.2 Nw on February 12, 2010. Those are station measurements from NOAA's daily records, 1900 to 2026, not official state records. By area the largest place is Plano, about 72 square miles.
About Collin County weather
The map on the Now tab shows every Collin 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 25 Collin County towns with station normals, the warmest month is August, when the day usually reaches 95°F, and the coldest is January, when the night usually falls to 34°F. May is the wettest, with rain on about 8 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.
Collin County weather records
Measured at the NOAA stations serving these towns, daily records 1900 to 2026. Station extremes, not official state records.
Common questions about Collin County weather
- What is the hottest temperature recorded at a Collin County station?
- 118°F at Mckinney Muni Ap on August 10, 1936, in the NOAA daily station records myweatherrock holds (1900 to 2026).
- What is the coldest temperature recorded at a Collin County station?
- -7°F at Mckinney Muni Ap on January 18, 1930.
- What is the most rain a Collin County station has measured in one day?
- 12.1 inches at Mckinney Muni Ap on September 21, 1964.
- What is the biggest one-day snowfall at a Collin County station?
- 8.5 inches at Richardson 2.2 Nw on February 12, 2010.
- How many Collin County towns have a weather page here?
- 25: 19 cities, 4 towns, 2 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 Collin 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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