January weather in Decatur, IN
The average temperature in Decatur in January is 25.7°F (18.3°F–33.1°F). Average precipitation: 2.51 inches. Average snowfall is 9.2 inches.
January is a winter month in Decatur, and is cooler than the annual average of 50.7°F. Daily temperatures swing about 14.8°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 23m. For travel, January is cold.
Avg High
33.1°F
Avg Low
18.3°F
Precipitation
2.51 in
Snow
9.2 in
January records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 60.1°F (2011) | -4.0°F (2018) | 1.12 in (2019) |
| January 2 | 48.9°F (2023) | -13.0°F (2018) | 1.40 in (1965) |
| January 3 | 55.0°F (2023) | -11.9°F (2018) | 1.04 in (2017) |
| January 4 | 62.1°F (2023) | -9.0°F (2014) | 2.61 in (1950) |
| January 5 | 62.1°F (2023) | 1.9°F (1976) | 1.12 in (1949) |
| January 6 | 53.1°F (2007) | -5.1°F (2014) | 0.96 in (2005) |
| January 7 | 59.0°F (2008) | -14.1°F (2014) | 0.35 in (1981) |
| January 8 | 64.9°F (2008) | -11.0°F (2014) | 1.10 in (1937) |
| January 9 | 63.0°F (2026) | -8.0°F (2015) | 0.85 in (2008) |
| January 10 | 59.0°F (2026) | -6.0°F (2010) | 1.02 in (1950) |
| January 11 | 59.0°F (2020) | -5.1°F (1978) | 0.74 in (2020) |
| January 12 | 60.1°F (2017) | -2.0°F (1978) | 1.66 in (2005) |
| January 13 | 60.1°F (2013) | -0.9°F (2015) | 2.30 in (2013) |
| January 14 | 52.0°F (2006) | -4.0°F (2015) | 1.01 in (1937) |
| January 15 | 45.0°F (2021) | -14.1°F (1972) | 1.20 in (2007) |
| January 16 | 44.1°F (2016) | -20.0°F (1972) | 0.64 in (1950) |
| January 17 | 54.0°F (2012) | -18.0°F (1972) | 1.63 in (2012) |
| January 18 | 55.0°F (2012) | 0.0°F (1976) | 0.92 in (1969) |
| January 19 | 44.1°F (2020) | 0.0°F (1976) | 1.32 in (1949) |
| January 20 | 55.0°F (2006) | -2.0°F (2009) | 1.29 in (2017) |
| January 21 | 55.9°F (2006) | -9.9°F (2019) | 1.78 in (1959) |
| January 22 | 62.1°F (2017) | -11.9°F (2019) | 0.93 in (1999) |
| January 23 | 62.1°F (2017) | -6.0°F (2014) | 1.18 in (1965) |
| January 24 | 50.0°F (2012) | -5.1°F (1978) | 1.26 in (1950) |
| January 25 | 54.0°F (1972) | -5.1°F (2014) | 0.36 in (2020) |
| January 26 | 51.1°F (2017) | -5.1°F (2014) | 1.31 in (1950) |
| January 27 | 54.0°F (2018) | -5.1°F (2022) | 1.72 in (1954) |
| January 28 | 48.9°F (2018) | -13.0°F (2014) | 1.17 in (1994) |
| January 29 | 55.0°F (2006) | -13.0°F (2014) | 1.03 in (1970) |
| January 30 | 66.0°F (2013) | -9.0°F (2019) | 1.24 in (1947) |
| January 31 | 55.0°F (2016) | -16.1°F (2019) | 1.08 in (1982) |