Jefferson County Weather in January
Average highs run from 38°F on January 1 to 40°F on January 31, and lows from 19°F to 18°F. Normal precipitation for the month is 0.98 in over about 4 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
- 38°F
- Average low
- 18°F
- Precipitation
- 0.98 in
- Snowfall
- 4.7 in
- Record high
- 78°FJan 28, 2015
- Record low
- -20°FJan 1, 1974
- Chance of a freeze
- 100%
- Daylight
- 9 h 28 min to 10 h 12 min
- Cloud cover
- 61%
- Humidity
- 80%
- Dew point
- 22°F
- Wind
- 11.2 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 | 38°F | 19°F | 67°F 2005 | -20°F 1974 | 13% | 7% |
| Jan 2 | 38°F | 19°F | 68°F 1964 | -16°F 1979 | 13% | 7% |
| Jan 3 | 38°F | 19°F | 66°F 1997 | -17°F 1979 | 13% | 7% |
| Jan 4 | 38°F | 19°F | 63°F 1956 | -15°F 1947 | 13% | 7% |
| Jan 5 | 38°F | 18°F | 70°F 2012 | -9°F 1959 | 13% | 7% |
| Jan 6 | 38°F | 18°F | 61°F 1961 | -8°F 2014 | 13% | 7% |
| Jan 7 | 37°F | 18°F | 69°F 2026 | -9°F 1968 | 13% | 7% |
| Jan 8 | 37°F | 18°F | 74°F 2003 | -11°F 1979 | 13% | 7% |
| Jan 9 | 37°F | 18°F | 63°F 2020 | -9°F 1973 | 13% | 7% |
| Jan 10 | 37°F | 18°F | 71°F 1990 | -15°F 1982 | 13% | 7% |
| Jan 11 | 37°F | 18°F | 66°F 2007 | -15°F 1977 | 12% | 7% |
| Jan 12 | 37°F | 18°F | 68°F 1960 | -20°F 1974 | 12% | 7% |
| Jan 13 | 37°F | 18°F | 70°F 1996 | -7°F 1963 | 12% | 7% |
| Jan 14 | 38°F | 18°F | 66°F 1952 | -13°F 1979 | 12% | 7% |
| Jan 15 | 38°F | 18°F | 65°F 2006 | -14°F 1979 | 12% | 7% |
| Jan 16 | 38°F | 17°F | 68°F 1952 | -9°F 1977 | 12% | 7% |
| Jan 17 | 38°F | 17°F | 65°F 1996 | -10°F 1978 | 12% | 7% |
| Jan 18 | 38°F | 17°F | 71°F 1951 | -6°F 1984 | 12% | 7% |
| Jan 19 | 38°F | 17°F | 67°F 2015 | -9°F 1985 | 12% | 7% |
| Jan 20 | 38°F | 17°F | 67°F 1997 | -12°F 1985 | 12% | 7% |
| Jan 21 | 38°F | 17°F | 69°F 1957 | -12°F 2025 | 12% | 7% |
| Jan 22 | 38°F | 18°F | 71°F 1967 | -5°F 1959 | 12% | 7% |
| Jan 23 | 38°F | 18°F | 73°F 1967 | -10°F 1962 | 12% | 7% |
| Jan 24 | 39°F | 18°F | 72°F 1981 | -7°F 1963 | 12% | 7% |
| Jan 25 | 39°F | 18°F | 68°F 2018 | -2°F 1961 | 12% | 7% |
| Jan 26 | 39°F | 18°F | 66°F 2002 | -9°F 1991 | 12% | 7% |
| Jan 27 | 39°F | 18°F | 67°F 2002 | -8°F 1963 | 12% | 7% |
| Jan 28 | 39°F | 18°F | 78°F 2015 | -11°F 1948 | 12% | 7% |
| Jan 29 | 40°F | 18°F | 70°F 2013 | -9°F 1966 | 13% | 7% |
| Jan 30 | 40°F | 18°F | 70°F 2012 | -6°F 1966 | 13% | 7% |
| Jan 31 | 40°F | 18°F | 73°F 2009 | -14°F 1979 | 13% | 7% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- January 1
- sunrise 7:41 AM, sunset 5:09 PM
- January 31
- sunrise 7:29 AM, sunset 5:41 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00146100 (Oskaloosa 4 Ne), public domain. Records: NOAA GHCN-Daily, station USW00013996, 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.