Starr County climate

Starr County Weather in December

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

Average highs run from 74°F on December 1 to 70°F on December 31, and lows from 50°F to 45°F. Normal precipitation for the month is 0.80 in over about 6 wet days.

December 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.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
72°F
Average low
47°F
Precipitation
0.80 in
Snowfall
0.1 in
Record high
92°FDec 30, 2024
Record low
26°FDec 26, 2010
Chance of a freeze
56%
Days of 90°F or more
0.7
Daylight
10 h 36 min to 10 h 30 min
Cloud cover
59%
Humidity
69%
Dew point
49°F
Wind
9.4 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
Dec 174°F50°F87°F 201229°F 200617%0%
Dec 274°F49°F91°F 200736°F 200817%0%
Dec 374°F49°F89°F 200540°F 200917%0%
Dec 474°F49°F88°F 201731°F 200917%0%
Dec 574°F49°F89°F 201726°F 200917%0%
Dec 674°F48°F86°F 200736°F 201117%0%
Dec 773°F48°F88°F 200730°F 201117%0%
Dec 873°F48°F89°F 200731°F 201118%0%
Dec 973°F48°F89°F 200733°F 201018%0%
Dec 1073°F48°F88°F 202137°F 201818%0%
Dec 1173°F47°F88°F 201030°F 200818%0%
Dec 1272°F47°F86°F 200435°F 200818%0%
Dec 1372°F47°F89°F 202234°F 201018%0%
Dec 1472°F47°F92°F 201937°F 200418%0%
Dec 1572°F47°F89°F 201930°F 200419%0%
Dec 1672°F46°F86°F 201931°F 200719%0%
Dec 1772°F46°F90°F 201630°F 200719%0%
Dec 1872°F46°F87°F 201232°F 201919%0%
Dec 1971°F46°F88°F 201235°F 201919%0%
Dec 2071°F46°F87°F 202538°F 200419%0%
Dec 2171°F46°F87°F 200734°F 201220%0%
Dec 2271°F45°F88°F 201732°F 202020%0%
Dec 2371°F45°F87°F 201527°F 202220%0%
Dec 2471°F45°F88°F 201530°F 202220%0%
Dec 2571°F45°F89°F 201526°F 200420%0%
Dec 2670°F45°F88°F 201526°F 201020%0%
Dec 2770°F45°F91°F 200832°F 202020%0%
Dec 2870°F45°F89°F 202432°F 202020%0%
Dec 2970°F45°F88°F 202432°F 202020%0%
Dec 3070°F45°F92°F 202432°F 202020%0%
Dec 3170°F45°F87°F 202132°F 202020%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.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 7:06 AM, sunset 5:42 PM
December 31
sunrise 7:23 AM, sunset 5:53 PM

Every day of December: 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.