Rio Grande City Average Rainfall by Month

This page shows the average precipitation (including snowfall) in each month of the year in Rio Grande City, Texas. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Rio Grande City?

In Rio Grande City, September has the greatest precipitation of any month. On average, Rio Grande City gets 4.8 inches of precipitation in September.

September is also the month where rain is most common. 25.6% of days in September will have at least some rain.

What's the Driest Month in Rio Grande City?

In Rio Grande City, January has the least precipitation of any month. On average, Rio Grande City gets 0.86 inches of precipitation in January.

July is the month with the lowest chance of precipitation. 13.1% of days in July will have measurable rain.

Month	Precipitation	% Chance
January	0.86 in	19.2
February	0.87 in	14.0
March	1.14 in	14.3
April	1.20 in	13.5
May	2.62 in	13.8
June	2.52 in	13.5
July	2.13 in	13.1
August	1.55 in	13.2
September	4.77 in	25.6
October	2.50 in	17.3
November	1.12 in	15.6
December	0.99 in	19.1
Year	21.66 in	16.3

Weather Station Details

Years	Station	Coordinates
1892–2024	Rio Grande City	location