Clayton climate

Clayton Weather in December

NOAA 1991-2020 normals for St Louis Sci Ctr, 4.8 km from Clayton

Average highs run from 50°F on December 1 to 41°F on December 31, and lows from 34°F to 26°F. Normal precipitation for the month is 2.58 in.

December day by day

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

Normal daily high and low temperature at Clayton, in °F, with the record for each date.-20020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
45°F
Average low
30°F
Precipitation
2.58 in
Snowfall
3.2 in
Record high
78°FDec 28, 2025
Record low
-16°FDec 22, 1989
Chance of a freeze
100%
Daylight
9 h 40 min to 9 h 31 min
Cloud cover
65%
Humidity
82%
Dew point
29°F
Wind
6.7 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 150°F34°F73°F 197014°F 19857%
Dec 249°F34°F75°F 20126°F 19427%
Dec 349°F33°F76°F 197010°F 19427%
Dec 449°F33°F74°F 200110°F 19918%
Dec 548°F33°F72°F 195612°F 20258%
Dec 648°F32°F72°F 19803°F 19778%
Dec 748°F32°F73°F 19660°F 19508%
Dec 847°F32°F74°F 19917°F 19589%
Dec 947°F32°F73°F 19391°F 19779%
Dec 1047°F31°F70°F 20150°F 19779%
Dec 1146°F31°F70°F 19492°F 19629%
Dec 1246°F31°F72°F 2015-5°F 19629%
Dec 1346°F31°F73°F 19483°F 196210%
Dec 1445°F30°F70°F 19751°F 196310%
Dec 1545°F30°F76°F 1948-4°F 194310%
Dec 1645°F30°F71°F 2021-8°F 198910%
Dec 1745°F30°F64°F 19392°F 198910%
Dec 1844°F29°F69°F 1939-4°F 198311%
Dec 1944°F29°F68°F 1976-7°F 198311%
Dec 2044°F29°F71°F 2013-3°F 198311%
Dec 2143°F29°F67°F 1967-12°F 198911%
Dec 2243°F28°F66°F 1965-16°F 198911%
Dec 2343°F28°F71°F 1982-15°F 198911%
Dec 2443°F28°F73°F 2021-12°F 198311%
Dec 2543°F28°F70°F 2019-13°F 198312%
Dec 2642°F27°F70°F 19420°F 194812%
Dec 2742°F27°F72°F 19712°F 201712%
Dec 2842°F27°F78°F 20250°F 196112%
Dec 2942°F27°F70°F 1984-2°F 198312%
Dec 3042°F27°F72°F 1965-4°F 197612%
Dec 3141°F26°F74°F 1951-10°F 197612%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Clayton, in percent, and of at least 0.1 inch of snowfall.02.557.51012.51102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 7:00 AM, sunset 4:40 PM
December 31
sunrise 7:19 AM, sunset 4:50 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00237452 (St Louis Sci Ctr), public domain. Records: NOAA GHCN-Daily, station USW00013994, 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.