Mason County Weather in January
Average highs run from 41°F on January 1 to 41°F on January 31, and lows from 21°F to 19°F. Normal precipitation for the month is 3.20 in over about 14 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 40°F
- Average low
- 19°F
- Precipitation
- 3.20 in
- Snowfall
- 6.3 in
- Record high
- 75°FJan 23, 1999
- Record low
- -24°FJan 17, 1977
- Chance of a freeze
- 100%
- Daylight
- 9 h 31 min to 10 h 14 min
- Cloud cover
- 75%
- Humidity
- 86%
- Dew point
- 26°F
- Wind
- 5.6 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 |
|---|---|---|---|---|---|---|
| Jan 1 | 41°F | 21°F | 70°F 1985 | -7°F 1968 | 44% | 8% |
| Jan 2 | 41°F | 21°F | 60°F 1966 | 3°F 1977 | 44% | 8% |
| Jan 3 | 41°F | 21°F | 71°F 2000 | -7°F 1979 | 44% | 8% |
| Jan 4 | 41°F | 21°F | 69°F 2004 | 3°F 1978 | 44% | 8% |
| Jan 5 | 40°F | 21°F | 69°F 1997 | -10°F 1981 | 44% | 8% |
| Jan 6 | 40°F | 20°F | 64°F 1998 | -8°F 1995 | 44% | 8% |
| Jan 7 | 40°F | 20°F | 59°F 1998 | 6°F 1977 | 44% | 8% |
| Jan 8 | 40°F | 20°F | 65°F 1965 | -22°F 1968 | 44% | 8% |
| Jan 9 | 40°F | 20°F | 69°F 1998 | -10°F 1976 | 44% | 8% |
| Jan 10 | 40°F | 20°F | 57°F 1975 | -15°F 1982 | 44% | 8% |
| Jan 11 | 40°F | 19°F | 58°F 1975 | -9°F 1977 | 44% | 8% |
| Jan 12 | 40°F | 19°F | 60°F 2005 | -6°F 1978 | 44% | 8% |
| Jan 13 | 40°F | 19°F | 68°F 1972 | -23°F 1977 | 44% | 8% |
| Jan 14 | 40°F | 19°F | 74°F 2005 | -12°F 1964 | 44% | 8% |
| Jan 15 | 40°F | 19°F | 70°F 1995 | -7°F 1979 | 44% | 8% |
| Jan 16 | 40°F | 19°F | 63°F 1974 | -12°F 1994 | 44% | 8% |
| Jan 17 | 40°F | 19°F | 63°F 1974 | -24°F 1977 | 44% | 8% |
| Jan 18 | 40°F | 19°F | 69°F 1974 | -15°F 1977 | 44% | 8% |
| Jan 19 | 40°F | 19°F | 69°F 1974 | -12°F 1994 | 44% | 8% |
| Jan 20 | 40°F | 19°F | 64°F 1974 | -18°F 1985 | 44% | 8% |
| Jan 21 | 40°F | 19°F | 65°F 1974 | -17°F 1985 | 44% | 8% |
| Jan 22 | 40°F | 19°F | 67°F 1967 | -18°F 1994 | 44% | 8% |
| Jan 23 | 40°F | 19°F | 75°F 1999 | -12°F 1977 | 44% | 8% |
| Jan 24 | 41°F | 19°F | 70°F 1967 | -15°F 1966 | 44% | 8% |
| Jan 25 | 41°F | 19°F | 71°F 1967 | -3°F 2000 | 44% | 8% |
| Jan 26 | 41°F | 19°F | 71°F 1967 | -3°F 2000 | 44% | 7% |
| Jan 27 | 41°F | 19°F | 69°F 1967 | -7°F 2003 | 44% | 7% |
| Jan 28 | 41°F | 19°F | 67°F 1999 | -9°F 2000 | 43% | 7% |
| Jan 29 | 41°F | 19°F | 70°F 1975 | -16°F 1977 | 43% | 7% |
| Jan 30 | 41°F | 19°F | 69°F 2002 | -4°F 1966 | 43% | 7% |
| Jan 31 | 41°F | 19°F | 62°F 1974 | -10°F 1977 | 43% | 7% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:46 AM, sunset 5:17 PM
- January 31
- sunrise 7:35 AM, sunset 5:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00468351 (Southside 3 Nnw), public domain. Records: NOAA GHCN-Daily, station USC00331288, 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.