January weather in Sussex, WI
The average temperature in Sussex in January is 19.2°F (10.7°F–27.6°F). Average precipitation: 1.74 inches.
January is a winter month in Sussex, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 16.9°F between overnight low and afternoon high. Daylight averages about 9h 9m. For travel, January is cold.
Avg High
27.6°F
Avg Low
10.7°F
Precipitation
1.74 in
Daylight
9h 9m
January records in Sussex
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 52.0°F (2011) | -11.9°F (2018) | 0.66 in (2019) |
| January 2 | 42.1°F (2023) | -13.0°F (2018) | 0.40 in (2021) |
| January 3 | 45.0°F (2020) | -13.0°F (2014) | 0.11 in (2015) |
| January 4 | 37.0°F (2019) | -13.0°F (2014) | 0.12 in (2015) |
| January 5 | 44.1°F (2019) | -9.0°F (2015) | 0.03 in (2015) |
| January 6 | 50.0°F (2019) | -17.0°F (2014) | 0.20 in (2022) |
| January 7 | 46.0°F (2012) | -20.0°F (2014) | 0.48 in (2026) |
| January 8 | 46.0°F (2019) | -20.0°F (2014) | 0.89 in (2019) |
| January 9 | 55.9°F (2026) | -11.9°F (2014) | 0.43 in (2026) |
| January 10 | 48.0°F (2020) | -9.9°F (2014) | 0.55 in (2024) |
| January 11 | 52.0°F (2018) | -8.0°F (2015) | 0.65 in (2017) |
| January 12 | 54.0°F (2012) | -6.0°F (2016) | 0.24 in (2020) |
| January 13 | 48.9°F (2013) | -2.9°F (2016) | 1.48 in (2024) |
| January 14 | 54.0°F (2026) | -8.0°F (2018) | 0.21 in (2024) |
| January 15 | 43.0°F (2021) | -8.0°F (2024) | 0.44 in (2021) |
| January 16 | 45.0°F (2023) | -11.0°F (2024) | 0.13 in (2018) |
| January 17 | 42.1°F (2012) | -11.0°F (2024) | 0.62 in (2017) |
| January 18 | 50.0°F (2025) | -9.9°F (2016) | 0.77 in (2020) |
| January 19 | 41.0°F (2013) | -9.9°F (2016) | 0.37 in (2019) |
| January 20 | 43.0°F (2013) | -8.0°F (2025) | 0.42 in (2017) |
| January 21 | 52.0°F (2018) | -14.1°F (2025) | 0.18 in (2012) |
| January 22 | 50.0°F (2017) | -15.0°F (2025) | 0.36 in (2018) |
| January 23 | 44.1°F (2017) | -17.0°F (2026) | 1.16 in (2018) |
| January 24 | 39.9°F (2012) | -18.9°F (2026) | 0.35 in (2024) |
| January 25 | 39.9°F (2015) | -18.0°F (2026) | 0.45 in (2020) |
| January 26 | 39.9°F (2016) | -18.0°F (2019) | 0.55 in (2017) |
| January 27 | 48.0°F (2018) | -18.0°F (2019) | 0.29 in (2021) |
| January 28 | 46.0°F (2018) | -18.0°F (2014) | 0.52 in (2019) |
| January 29 | 45.0°F (2025) | -18.9°F (2014) | 0.88 in (2013) |
| January 30 | 57.0°F (2013) | -25.1°F (2019) | 1.25 in (2013) |
| January 31 | 57.0°F (2025) | -27.0°F (2019) | 0.56 in (2021) |