Starr County climate

Starr County Weather in August

NOAA 1991-2020 normals for Rio Grande City, 21.9 km from Starr County

Average highs run from 100°F on August 1 to 97°F on August 31, and lows from 75°F to 74°F. Normal precipitation for the month is 1.34 in over about 4 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Starr County, in °F, with the record for each date.60708090100110151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
99°F
Average low
75°F
Precipitation
1.34 in
Record high
107°FAug 28, 2023
Record low
63°FAug 13, 2004
Chance of a freeze
0%
Days of 90°F or more
30.0
Daylight
13 h 22 min to 12 h 42 min
Cloud cover
38%
Humidity
62%
Dew point
70°F
Wind
11.2 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 1100°F75°F104°F 201271°F 202010%0%
Aug 2100°F75°F106°F 202572°F 201010%0%
Aug 3100°F76°F105°F 202567°F 201810%0%
Aug 4100°F76°F105°F 202572°F 201410%0%
Aug 5100°F76°F104°F 202272°F 201410%0%
Aug 6100°F76°F105°F 201372°F 200911%0%
Aug 7100°F76°F105°F 202472°F 200511%0%
Aug 8100°F76°F105°F 202374°F 200611%0%
Aug 9100°F76°F104°F 201673°F 201412%0%
Aug 10100°F76°F104°F 202373°F 201512%0%
Aug 11100°F76°F105°F 201673°F 201512%0%
Aug 12100°F76°F106°F 201969°F 200413%0%
Aug 13100°F75°F106°F 201963°F 200413%0%
Aug 14100°F75°F105°F 202367°F 200413%0%
Aug 15100°F75°F104°F 201966°F 200414%0%
Aug 16100°F75°F106°F 201965°F 200414%0%
Aug 17100°F75°F105°F 202368°F 200415%0%
Aug 18100°F75°F104°F 202373°F 202015%0%
Aug 19100°F75°F106°F 202368°F 201316%0%
Aug 2099°F75°F104°F 202471°F 201316%0%
Aug 2199°F75°F106°F 202472°F 201217%0%
Aug 2299°F75°F105°F 202472°F 202517%0%
Aug 2399°F75°F103°F 202471°F 200918%0%
Aug 2499°F75°F104°F 202672°F 202018%0%
Aug 2598°F75°F105°F 201972°F 201619%0%
Aug 2698°F75°F104°F 202671°F 200919%0%
Aug 2798°F75°F104°F 202670°F 200920%0%
Aug 2898°F74°F107°F 202363°F 201520%0%
Aug 2998°F74°F104°F 201167°F 201521%0%
Aug 3097°F74°F105°F 201271°F 201521%0%
Aug 3197°F74°F104°F 200570°F 202322%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Starr County, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 7:00 AM, sunset 8:22 PM
August 31
sunrise 7:14 AM, sunset 7:56 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417622 (Rio Grande City), public domain. Records: NOAA GHCN-Daily, station USW00012987, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.