Plano climate

Plano Weather in December

NOAA 1991-2020 normals for Richardson, 4.9 km from Plano

Average highs run from 61°F on December 1 to 55°F on December 31, and lows from 41°F to 36°F. Normal precipitation for the month is 3.37 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 Plano, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
57°F
Average low
38°F
Precipitation
3.37 in
Snowfall
0.2 in
Record high
84°FDec 26, 2025
Record low
9°FDec 22, 2022
Chance of a freeze
99%
Daylight
10 h 08 min to 10 h 00 min
Cloud cover
55%
Humidity
77%
Dew point
38°F
Wind
10.3 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 161°F41°F73°F 202124°F 200623%0%
Dec 261°F41°F81°F 201230°F 200823%0%
Dec 360°F41°F78°F 201229°F 200923%0%
Dec 460°F41°F78°F 201322°F 200623%0%
Dec 560°F40°F77°F 197922°F 200924%0%
Dec 660°F40°F76°F 202218°F 201324%0%
Dec 759°F40°F79°F 200718°F 201324%0%
Dec 859°F40°F77°F 202321°F 200624%0%
Dec 959°F39°F78°F 202123°F 200924%0%
Dec 1058°F39°F81°F 202118°F 201324%0%
Dec 1158°F39°F78°F 197922°F 201224%0%
Dec 1258°F39°F73°F 201524°F 201225%0%
Dec 1358°F38°F73°F 201724°F 201025%0%
Dec 1457°F38°F75°F 200828°F 202525%0%
Dec 1557°F38°F78°F 202123°F 200825%0%
Dec 1657°F38°F76°F 200616°F 197925%0%
Dec 1757°F38°F77°F 200617°F 197925%0%
Dec 1857°F37°F76°F 201215°F 201625%0%
Dec 1956°F37°F77°F 201214°F 201625%0%
Dec 2056°F37°F80°F 202525°F 201625%0%
Dec 2156°F37°F83°F 201020°F 200826%0%
Dec 2256°F37°F73°F 20259°F 202226%0%
Dec 2356°F37°F79°F 20259°F 202226%0%
Dec 2456°F36°F79°F 202520°F 202226%1%
Dec 2555°F36°F80°F 202123°F 200926%1%
Dec 2655°F36°F84°F 202520°F 201226%1%
Dec 2755°F36°F79°F 202522°F 201226%1%
Dec 2855°F36°F82°F 202526°F 200926%1%
Dec 2955°F36°F72°F 202225°F 200726%1%
Dec 3055°F36°F79°F 202425°F 201226%1%
Dec 3155°F36°F74°F 201120°F 201726%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Plano, 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 7:12 AM, sunset 5:20 PM
December 31
sunrise 7:30 AM, sunset 5:30 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417588 (Richardson), public domain. Records: NOAA GHCN-Daily, station USC00417588, 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.