January weather in Winthrop Harbor, IL
The average temperature in Winthrop Harbor in January is 23.4°F (16.0°F–30.9°F). Average precipitation: 1.41 inches.
January is a winter month in Winthrop Harbor, and is cooler than the annual average of 48.3°F. Daily temperatures swing about 14.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 13m. For travel, January is cold.
Avg High
30.9°F
Avg Low
16.0°F
Precipitation
1.41 in
Daylight
9h 13m
January records in Winthrop Harbor
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 48.0°F (2000) | -7.8°F (2018) | 0.42 in (2022) |
| January 2 | 59.0°F (2000) | -6.9°F (2018) | 0.64 in (2006) |
| January 3 | 52.0°F (2004) | -8.9°F (2014) | 0.52 in (2015) |
| January 4 | 51.1°F (2007) | -2.7°F (2018) | 0.26 in (2009) |
| January 5 | 54.0°F (2019) | -5.8°F (2015) | 0.40 in (2001) |
| January 6 | 59.0°F (2008) | -15.9°F (2014) | 0.16 in (2024) |
| January 7 | 64.0°F (2008) | -13.9°F (2014) | 0.50 in (2019) |
| January 8 | 57.9°F (2026) | -13.9°F (2014) | 0.37 in (2008) |
| January 9 | 59.0°F (2026) | -14.8°F (2014) | 0.96 in (2024) |
| January 10 | 55.0°F (2018) | -3.8°F (2015) | 1.02 in (2014) |
| January 11 | 69.1°F (2018) | -3.8°F (2016) | 0.72 in (2005) |
| January 12 | 57.0°F (2005) | -1.8°F (2009) | 1.12 in (2024) |
| January 13 | 53.1°F (2026) | -3.8°F (2009) | 0.22 in (2005) |
| January 14 | 45.0°F (2002) | -8.9°F (2024) | 0.19 in (2021) |
| January 15 | 42.1°F (2016) | -11.7°F (2009) | 0.11 in (2018) |
| January 16 | 48.9°F (2023) | -18.8°F (2009) | 0.86 in (2017) |
| January 17 | 48.9°F (2023) | -2.7°F (2016) | 0.46 in (2017) |
| January 18 | 44.1°F (2013) | -5.8°F (2016) | 0.31 in (2020) |
| January 19 | 52.0°F (2006) | -3.8°F (2008) | 0.29 in (2017) |
| January 20 | 46.9°F (2018) | -5.8°F (2008) | 0.30 in (2017) |
| January 21 | 57.9°F (2017) | -7.8°F (2025) | 0.50 in (2006) |
| January 22 | 54.0°F (2002) | -4.9°F (2013) | 0.98 in (2018) |
| January 23 | 46.0°F (2002) | -14.1°F (2026) | 0.35 in (2024) |
| January 24 | 44.1°F (2010) | -13.0°F (2026) | 0.60 in (2020) |
| January 25 | 48.9°F (2002) | -7.8°F (2019) | 0.32 in (2023) |
| January 26 | 55.9°F (2013) | -13.9°F (2019) | 0.50 in (2024) |
| January 27 | 60.1°F (2002) | -9.8°F (2014) | 0.08 in (2013) |
| January 28 | 48.9°F (2025) | -12.8°F (2014) | 0.41 in (2023) |
| January 29 | 48.9°F (2008) | -11.7°F (2019) | 1.14 in (2013) |
| January 30 | 53.1°F (2025) | -22.9°F (2019) | 0.39 in (2013) |
| January 31 | 55.9°F (2012) | -22.9°F (2019) | 0.35 in (2002) |