Fairfax Weather in January
Average highs run from 23°F on January 1 to 25°F on January 31, and lows from 6°F to 5°F. Normal precipitation for the month is 0.67 in over about 5 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
- 23°F
- Average low
- 4°F
- Precipitation
- 0.67 in
- Snowfall
- 7.1 in
- Record high
- 68°FJan 24, 1981
- Record low
- -36°FJan 12, 1912
- Chance of a freeze
- 100%
- Daylight
- 8 h 55 min to 9 h 49 min
- Cloud cover
- 62%
- Humidity
- 87%
- Dew point
- 10°F
- Wind
- 11.9 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 | 23°F | 6°F | 49°F 1944 | -30°F 1974 | 17% | 16% |
| Jan 2 | 22°F | 6°F | 48°F 1998 | -29°F 2010 | 17% | 16% |
| Jan 3 | 22°F | 5°F | 45°F 1962 | -28°F 1911 | 17% | 16% |
| Jan 4 | 22°F | 5°F | 47°F 2012 | -23°F 1960 | 17% | 16% |
| Jan 5 | 22°F | 5°F | 59°F 2012 | -26°F 1912 | 17% | 16% |
| Jan 6 | 22°F | 5°F | 50°F 1933 | -26°F 1909 | 17% | 16% |
| Jan 7 | 22°F | 5°F | 56°F 2003 | -28°F 1912 | 18% | 16% |
| Jan 8 | 22°F | 5°F | 56°F 2003 | -24°F 1977 | 18% | 16% |
| Jan 9 | 22°F | 4°F | 55°F 2012 | -32°F 1977 | 18% | 16% |
| Jan 10 | 22°F | 4°F | 57°F 2012 | -27°F 1982 | 18% | 17% |
| Jan 11 | 22°F | 4°F | 49°F 1958 | -27°F 1918 | 18% | 17% |
| Jan 12 | 22°F | 4°F | 56°F 1987 | -36°F 1912 | 18% | 17% |
| Jan 13 | 22°F | 4°F | 55°F 1980 | -33°F 1916 | 18% | 17% |
| Jan 14 | 22°F | 4°F | 47°F 1944 | -23°F 1972 | 18% | 17% |
| Jan 15 | 22°F | 4°F | 47°F 1942 | -28°F 1972 | 18% | 17% |
| Jan 16 | 22°F | 4°F | 49°F 1961 | -29°F 1977 | 18% | 17% |
| Jan 17 | 22°F | 4°F | 46°F 1942 | -26°F 1943 | 18% | 17% |
| Jan 18 | 22°F | 4°F | 50°F 1981 | -30°F 1970 | 18% | 17% |
| Jan 19 | 22°F | 4°F | 51°F 1947 | -34°F 1970 | 18% | 17% |
| Jan 20 | 23°F | 4°F | 60°F 1944 | -26°F 1970 | 18% | 17% |
| Jan 21 | 23°F | 4°F | 55°F 1944 | -31°F 1970 | 18% | 17% |
| Jan 22 | 23°F | 4°F | 56°F 1942 | -32°F 1936 | 18% | 17% |
| Jan 23 | 23°F | 4°F | 56°F 1981 | -26°F 1935 | 19% | 17% |
| Jan 24 | 23°F | 4°F | 68°F 1981 | -30°F 1936 | 19% | 17% |
| Jan 25 | 23°F | 4°F | 64°F 1944 | -19°F 1915 | 19% | 17% |
| Jan 26 | 24°F | 4°F | 57°F 1944 | -25°F 1918 | 19% | 17% |
| Jan 27 | 24°F | 4°F | 55°F 1989 | -23°F 1915 | 19% | 17% |
| Jan 28 | 24°F | 4°F | 51°F 2025 | -25°F 1966 | 19% | 17% |
| Jan 29 | 24°F | 4°F | 59°F 1931 | -30°F 1951 | 19% | 17% |
| Jan 30 | 24°F | 5°F | 55°F 1931 | -29°F 2019 | 19% | 17% |
| Jan 31 | 25°F | 5°F | 57°F 2024 | -30°F 1918 | 19% | 17% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- January 1
- sunrise 7:55 AM, sunset 4:50 PM
- January 31
- sunrise 7:38 AM, sunset 5:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00216839 (Redwood Falls), public domain. Records: NOAA GHCN-Daily, station USW00014992, 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.