Decatur Weather in January
Average highs run from 33°F on January 1 to 31°F on January 31, and lows from 19°F to 15°F. Normal precipitation for the month is 3.10 in over about 15 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
- 31°F
- Average low
- 16°F
- Precipitation
- 3.10 in
- Snowfall
- 30.5 in
- Record high
- 67°FJan 25, 1950
- Record low
- -23°FJan 20, 1994
- Chance of a freeze
- 100%
- Daylight
- 9 h 11 min to 9 h 59 min
- Cloud cover
- 76%
- Humidity
- 88%
- Dew point
- 22°F
- Wind
- 14.1 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 | 33°F | 19°F | 62°F 2005 | -11°F 1968 | 47% | 36% |
| Jan 2 | 32°F | 18°F | 57°F 1897 | -6°F 1945 | 47% | 36% |
| Jan 3 | 32°F | 18°F | 59°F 2000 | -11°F 2014 | 47% | 37% |
| Jan 4 | 32°F | 18°F | 57°F 1950 | -19°F 1981 | 47% | 37% |
| Jan 5 | 32°F | 18°F | 61°F 1997 | -15°F 1999 | 48% | 37% |
| Jan 6 | 32°F | 17°F | 56°F 1946 | -9°F 1988 | 48% | 38% |
| Jan 7 | 32°F | 17°F | 56°F 2008 | -16°F 2014 | 48% | 38% |
| Jan 8 | 32°F | 17°F | 66°F 2008 | -13°F 1942 | 48% | 38% |
| Jan 9 | 31°F | 17°F | 61°F 2026 | -15°F 1940 | 48% | 39% |
| Jan 10 | 31°F | 17°F | 60°F 2026 | -14°F 1982 | 48% | 39% |
| Jan 11 | 31°F | 17°F | 58°F 1975 | -13°F 1982 | 48% | 39% |
| Jan 12 | 31°F | 16°F | 58°F 2018 | -2°F 1929 | 48% | 39% |
| Jan 13 | 31°F | 16°F | 61°F 1950 | -11°F 1977 | 48% | 39% |
| Jan 14 | 31°F | 16°F | 57°F 1932 | -14°F 1929 | 48% | 39% |
| Jan 15 | 31°F | 16°F | 59°F 1932 | -18°F 1979 | 47% | 40% |
| Jan 16 | 31°F | 16°F | 56°F 1953 | -19°F 1994 | 47% | 40% |
| Jan 17 | 31°F | 16°F | 64°F 1952 | -19°F 1994 | 47% | 39% |
| Jan 18 | 31°F | 16°F | 58°F 1973 | -14°F 1930 | 47% | 39% |
| Jan 19 | 31°F | 16°F | 59°F 1996 | -22°F 1994 | 47% | 39% |
| Jan 20 | 31°F | 15°F | 54°F 2006 | -23°F 1994 | 47% | 39% |
| Jan 21 | 31°F | 15°F | 56°F 1934 | -21°F 1984 | 46% | 39% |
| Jan 22 | 31°F | 15°F | 60°F 2017 | -16°F 1970 | 46% | 39% |
| Jan 23 | 31°F | 15°F | 57°F 1967 | -14°F 1948 | 46% | 38% |
| Jan 24 | 31°F | 15°F | 62°F 1950 | -19°F 1897 | 46% | 38% |
| Jan 25 | 31°F | 15°F | 67°F 1950 | -18°F 1897 | 45% | 38% |
| Jan 26 | 31°F | 15°F | 63°F 1950 | -13°F 1897 | 45% | 38% |
| Jan 27 | 31°F | 15°F | 63°F 1944 | -7°F 2003 | 45% | 37% |
| Jan 28 | 31°F | 15°F | 58°F 2002 | -14°F 2014 | 44% | 37% |
| Jan 29 | 31°F | 15°F | 59°F 2002 | -15°F 2014 | 44% | 36% |
| Jan 30 | 31°F | 15°F | 58°F 2013 | -14°F 2019 | 44% | 36% |
| Jan 31 | 31°F | 15°F | 52°F 1988 | -19°F 2019 | 43% | 36% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 8:12 AM, sunset 5:23 PM
- January 31
- sunrise 7:58 AM, sunset 5:57 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00202250 (Dowagiac 1 W), public domain. Records: NOAA GHCN-Daily, station USC00208184, 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.