Mather climate

Mather Weather in December

NOAA 1991-2020 normals for Waynesburg 1 E, 8.8 km from Mather

Average highs run from 47°F on December 1 to 40°F on December 31, and lows from 27°F to 22°F. Normal precipitation for the month is 3.29 in over about 14 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 Mather, in °F, with the record for each date.-20020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
43°F
Average low
25°F
Precipitation
3.29 in
Snowfall
5.6 in
Record high
82°FDec 4, 1982
Record low
-16°FDec 26, 1983
Chance of a freeze
100%
Daylight
9 h 33 min to 9 h 23 min
Cloud cover
77%
Humidity
86%
Dew point
28°F
Wind
5.4 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 147°F27°F70°F 19822°F 197643%11%
Dec 247°F27°F70°F 2006-5°F 197643%11%
Dec 346°F27°F65°F 1982-15°F 197643%11%
Dec 446°F27°F82°F 198210°F 197644%12%
Dec 546°F27°F76°F 19826°F 197644%12%
Dec 645°F27°F72°F 2001-2°F 197744%13%
Dec 745°F26°F71°F 19982°F 197744%13%
Dec 845°F26°F69°F 20040°F 197744%13%
Dec 944°F26°F60°F 19870°F 197745%14%
Dec 1044°F26°F58°F 19990°F 197745%14%
Dec 1144°F26°F55°F 20042°F 197745%15%
Dec 1244°F26°F64°F 20073°F 198845%15%
Dec 1343°F25°F62°F 20060°F 198245%15%
Dec 1443°F25°F66°F 19755°F 200846%16%
Dec 1543°F25°F62°F 19756°F 198946%16%
Dec 1643°F25°F62°F 1977-2°F 198946%16%
Dec 1742°F25°F62°F 1977-3°F 198946%17%
Dec 1842°F24°F60°F 2006-5°F 198946%17%
Dec 1942°F24°F58°F 2006-4°F 198947%18%
Dec 2042°F24°F61°F 2002-2°F 200447%18%
Dec 2141°F24°F58°F 1988-1°F 200447%18%
Dec 2241°F24°F64°F 1990-13°F 198947%18%
Dec 2341°F23°F70°F 2013-13°F 198947%19%
Dec 2441°F23°F57°F 1996-2°F 197647%19%
Dec 2541°F23°F68°F 1982-3°F 198947%19%
Dec 2641°F23°F69°F 1982-16°F 198347%20%
Dec 2740°F23°F78°F 1982-16°F 198348%20%
Dec 2840°F22°F68°F 20081°F 197748%20%
Dec 2940°F22°F69°F 1982-8°F 197648%21%
Dec 3040°F22°F65°F 1990-10°F 197648%21%
Dec 3140°F22°F65°F 19900°F 198348%21%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mather, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EST).

December 1
sunrise 7:23 AM, sunset 4:56 PM
December 31
sunrise 7:42 AM, sunset 5:05 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00369367 (Waynesburg 1 E), public domain. Records: NOAA GHCN-Daily, station USC00369318, 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.