Rio Grande City Average Temperature by Month

This page shows the average temperature in each month of the year in Rio Grande City, Texas. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Rio Grande City?
In Rio Grande City, Texas, the warmest month is July, with an average daily high temperature of 99.6 °F and an average low of 75.8 °F.
What's the Coldest Month in Rio Grande City?
In Rio Grande City, Texas, the coolest month is January, with an average daily high temperature of 71.5 °F and an average low of 46.9 °F.
Month Avg. High Avg. Low
January 71.5 °F 46.9 °F
February 76.6 °F 50.3 °F
March 82.3 °F 56.3 °F
April 88.8 °F 63.7 °F
May 94.3 °F 70.7 °F
June 98.5 °F 74.8 °F
July 99.6 °F 75.8 °F
August 99.6 °F 75.6 °F
September 94.4 °F 71.6 °F
October 88.6 °F 63.8 °F
November 79.3 °F 54.7 °F
December 71.6 °F 47.4 °F
Year 87.0 °F 62.5 °F
Weather Station Details
Years Station Coordinates
1892–2024 Rio Grande City location
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