Starr County has 106 places on myweatherrock (102 census-designated places, 4 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 116°F at Rio Grande City on June 14, 1998. The coldest night is 10°F at Rio Grande City on January 12, 1962. The wettest day brought 12.51 inches of rain at Rio Grande City on September 22, 1967. The biggest single-day snow measured 1.69 inches at Mcallen on December 25, 2004. Those are station measurements from NOAA's daily records, 1892 to 2026, not official state records. By area the largest place is Rio Grande, about 11 square miles.
About Starr County weather
The map on the Now tab shows every Starr 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 106 Starr County towns with station normals, the warmest month is August, when the day usually reaches 100°F, and the coldest is January, when the night usually falls to 46°F. September is the wettest, with rain on about 7 days. August afternoons run from about 99°F in Delmita to 102°F in Chapeno.
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.
Starr County weather records
Hottest day
116°F
Rio Grande City, June 14, 1998
Coldest night
10°F
Rio Grande City, January 12, 1962
Wettest day
12.51 in
Rio Grande City, September 22, 1967
Biggest snow
1.69 in
Mcallen, December 25, 2004
Measured at the NOAA stations serving these towns, daily records 1892 to 2026. Station extremes, not official state records.
Common questions about Starr County weather
What is the hottest temperature recorded at a Starr County station?
116°F at Rio Grande City on June 14, 1998, in the NOAA daily station records myweatherrock holds (1892 to 2026).
What is the coldest temperature recorded at a Starr County station?
10°F at Rio Grande City on January 12, 1962.
What is the most rain a Starr County station has measured in one day?
12.51 inches at Rio Grande City on September 22, 1967.
What is the biggest one-day snowfall at a Starr County station?
1.69 inches at Mcallen on December 25, 2004.
How many Starr County towns have a weather page here?
106: 102 census-designated places, 4 cities. 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 Starr 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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