January weather in Ottawa, IL
The average temperature in Ottawa in January is 22.8°F (14.2°F–31.4°F). Average precipitation: 1.95 inches. Average snowfall is 8.4 inches.
January is a winter month in Ottawa, and is cooler than the annual average of 49.7°F. Daily temperatures swing about 17.2°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 20m. For travel, January is cold.
Avg High
31.4°F
Avg Low
14.2°F
Precipitation
1.95 in
Snow
8.4 in
January records in Ottawa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.9°F (2005) | -13.0°F (1977) | 1.30 in (1985) |
| January 2 | 53.1°F (2005) | -18.9°F (2018) | 1.17 in (2005) |
| January 3 | 62.1°F (2000) | -18.9°F (2018) | 0.84 in (1951) |
| January 4 | 59.0°F (1998) | -18.9°F (2018) | 0.77 in (1950) |
| January 5 | 55.0°F (1998) | -27.0°F (1999) | 1.29 in (2007) |
| January 6 | 54.0°F (2012) | -22.0°F (1999) | 0.79 in (1955) |
| January 7 | 62.1°F (2008) | -15.0°F (2014) | 0.98 in (1962) |
| January 8 | 64.9°F (2008) | -11.0°F (2014) | 2.25 in (2008) |
| January 9 | 61.0°F (2026) | -7.1°F (2015) | 0.67 in (1946) |
| January 10 | 55.0°F (2002) | -16.1°F (1999) | 1.40 in (1975) |
| January 11 | 55.0°F (2018) | -14.1°F (1977) | 2.91 in (2020) |
| January 12 | 60.1°F (2018) | -14.1°F (1977) | 1.23 in (1960) |
| January 13 | 62.1°F (2005) | -9.9°F (1977) | 1.39 in (1966) |
| January 14 | 46.9°F (2026) | -8.0°F (2024) | 0.67 in (1979) |
| January 15 | 61.0°F (1949) | -15.0°F (2009) | 0.57 in (1962) |
| January 16 | 60.1°F (1949) | -23.1°F (2009) | 0.50 in (1992) |
| January 17 | 51.1°F (2023) | -24.0°F (2009) | 1.03 in (2017) |
| January 18 | 52.0°F (2023) | -17.0°F (1977) | 0.66 in (2020) |
| January 19 | 46.0°F (2022) | -4.0°F (1977) | 0.87 in (1949) |
| January 20 | 57.9°F (2006) | -4.0°F (1977) | 0.87 in (1988) |
| January 21 | 48.9°F (2017) | -13.0°F (2000) | 1.14 in (2006) |
| January 22 | 59.0°F (2017) | -13.0°F (2000) | 1.25 in (1999) |
| January 23 | 57.0°F (2018) | -7.1°F (1977) | 1.75 in (1965) |
| January 24 | 50.0°F (2002) | -11.0°F (2000) | 0.58 in (1999) |
| January 25 | 44.1°F (2015) | -11.9°F (2000) | 0.50 in (1990) |
| January 26 | 51.1°F (2002) | -11.9°F (2000) | 0.82 in (1974) |
| January 27 | 55.9°F (2002) | -13.0°F (2003) | 0.92 in (1967) |
| January 28 | 60.1°F (2002) | -16.1°F (2014) | 0.58 in (1949) |
| January 29 | 59.0°F (2002) | -14.1°F (1977) | 0.76 in (2006) |
| January 30 | 63.0°F (2013) | -20.9°F (2019) | 1.56 in (2013) |
| January 31 | 53.1°F (2012) | -22.0°F (2019) | 1.32 in (2002) |