Mason County Weather in December
Average highs run from 66°F on December 1 to 61°F on December 31, and lows from 39°F to 33°F. Normal precipitation for the month is 1.38 in over about 5 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 63°F
- Average low
- 36°F
- Precipitation
- 1.38 in
- Snowfall
- 0.1 in
- Record high
- 91°FDec 5, 1954
- Record low
- -2°FDec 23, 1989
- Chance of a freeze
- 100%
- Daylight
- 10 h 18 min to 10 h 12 min
- Cloud cover
- 55%
- Humidity
- 70%
- 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 66°F | 39°F | 84°F 1950 | 16°F 1896 | 15% | 0% |
| Dec 2 | 66°F | 39°F | 82°F 2012 | 21°F 1896 | 15% | 0% |
| Dec 3 | 66°F | 38°F | 83°F 2021 | 22°F 1895 | 15% | 0% |
| Dec 4 | 65°F | 38°F | 88°F 2005 | 15°F 1950 | 16% | 0% |
| Dec 5 | 65°F | 38°F | 91°F 1954 | 14°F 1950 | 16% | 0% |
| Dec 6 | 65°F | 38°F | 81°F 1896 | 11°F 1950 | 16% | 0% |
| Dec 7 | 65°F | 37°F | 84°F 1951 | 11°F 1950 | 16% | 0% |
| Dec 8 | 65°F | 37°F | 82°F 1966 | 14°F 2005 | 16% | 0% |
| Dec 9 | 64°F | 37°F | 82°F 2023 | 12°F 1978 | 16% | 0% |
| Dec 10 | 64°F | 37°F | 85°F 2021 | 12°F 1978 | 16% | 0% |
| Dec 11 | 64°F | 36°F | 88°F 2015 | 12°F 1978 | 16% | 0% |
| Dec 12 | 64°F | 36°F | 80°F 1996 | 17°F 1989 | 16% | 0% |
| Dec 13 | 64°F | 36°F | 82°F 1973 | 18°F 1958 | 16% | 0% |
| Dec 14 | 63°F | 36°F | 85°F 1995 | 13°F 1958 | 16% | 0% |
| Dec 15 | 63°F | 36°F | 86°F 2019 | 13°F 1958 | 17% | 1% |
| Dec 16 | 63°F | 35°F | 85°F 1995 | 10°F 1989 | 16% | 1% |
| Dec 17 | 63°F | 35°F | 81°F 2024 | 12°F 1989 | 16% | 1% |
| Dec 18 | 63°F | 35°F | 81°F 2002 | 14°F 2016 | 16% | 1% |
| Dec 19 | 62°F | 35°F | 82°F 2012 | 14°F 1996 | 17% | 1% |
| Dec 20 | 62°F | 35°F | 82°F 2012 | 16°F 1983 | 17% | 1% |
| Dec 21 | 62°F | 34°F | 86°F 2010 | 18°F 1951 | 17% | 1% |
| Dec 22 | 62°F | 34°F | 90°F 2010 | 6°F 1983 | 17% | 1% |
| Dec 23 | 62°F | 34°F | 82°F 2021 | -2°F 1989 | 17% | 1% |
| Dec 24 | 61°F | 34°F | 84°F 2021 | 6°F 1983 | 17% | 1% |
| Dec 25 | 61°F | 34°F | 87°F 1955 | 6°F 1983 | 17% | 1% |
| Dec 26 | 61°F | 34°F | 88°F 2021 | 13°F 1983 | 17% | 1% |
| Dec 27 | 61°F | 34°F | 83°F 2005 | 19°F 1894 | 17% | 1% |
| Dec 28 | 61°F | 34°F | 84°F 1946 | 10°F 1894 | 17% | 1% |
| Dec 29 | 61°F | 34°F | 79°F 1970 | 8°F 1983 | 17% | 1% |
| Dec 30 | 61°F | 34°F | 83°F 1951 | 5°F 1983 | 17% | 1% |
| Dec 31 | 61°F | 33°F | 90°F 1951 | 6°F 1983 | 17% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:17 AM, sunset 5:35 PM
- December 31
- sunrise 7:34 AM, sunset 5:46 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415650 (Mason), public domain. Records: NOAA GHCN-Daily, station USC00411017, 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.