Harlingen climate

Harlingen Weather in December

NOAA 1991-2020 normals for Harlingen, 2.7 km from Harlingen

Average highs run from 76°F on December 1 to 71°F on December 31, and lows from 55°F to 51°F. Normal precipitation for the month is 1.58 in over about 8 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 Harlingen, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
73°F
Average low
53°F
Precipitation
1.58 in
Snowfall
0.1 in
Record high
90°FDec 14, 2019
Record low
27°FDec 23, 2022
Chance of a freeze
12%
Daylight
10 h 37 min to 10 h 32 min
Cloud cover
67%
Humidity
75%
Dew point
56°F
Wind
11.4 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 176°F55°F88°F 201234°F 201023%0%
Dec 276°F55°F88°F 200740°F 200823%0%
Dec 375°F55°F87°F 201244°F 200023%0%
Dec 475°F55°F88°F 201232°F 200923%0%
Dec 575°F54°F88°F 201729°F 200923%0%
Dec 675°F54°F86°F 202136°F 200223%0%
Dec 775°F54°F87°F 202531°F 201123%0%
Dec 875°F54°F87°F 200733°F 201723%0%
Dec 974°F54°F88°F 196135°F 201023%0%
Dec 1074°F53°F88°F 200737°F 201823%0%
Dec 1174°F53°F87°F 201031°F 200824%0%
Dec 1274°F53°F87°F 200734°F 199724%0%
Dec 1374°F53°F87°F 202034°F 200024%0%
Dec 1473°F53°F90°F 201934°F 199724%0%
Dec 1573°F52°F87°F 201536°F 199724%0%
Dec 1673°F52°F88°F 201932°F 195824%0%
Dec 1773°F52°F85°F 201633°F 200324%0%
Dec 1873°F52°F86°F 201233°F 201925%0%
Dec 1973°F52°F87°F 201732°F 200025%0%
Dec 2072°F52°F88°F 200737°F 200025%0%
Dec 2172°F52°F87°F 201337°F 196025%0%
Dec 2272°F52°F86°F 201733°F 199825%0%
Dec 2372°F51°F89°F 201527°F 202225%0%
Dec 2472°F51°F89°F 201531°F 202225%0%
Dec 2572°F51°F88°F 201532°F 202025%0%
Dec 2672°F51°F86°F 201531°F 200425%0%
Dec 2772°F51°F87°F 200836°F 201025%0%
Dec 2871°F51°F88°F 202431°F 199725%0%
Dec 2971°F51°F89°F 202132°F 199726%0%
Dec 3071°F51°F88°F 202433°F 199726%0%
Dec 3171°F51°F89°F 201039°F 195826%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Harlingen, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 7:01 AM, sunset 5:38 PM
December 31
sunrise 7:18 AM, sunset 5:50 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00413943 (Harlingen), public domain. Records: NOAA GHCN-Daily, station USW00012904, 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.