December weather in Sussex, WI
The average temperature in Sussex in December is 25.1°F (17.5°F–32.7°F). Average precipitation: 2.10 inches.
December is a winter month in Sussex, and is cooler than the annual average of 46.5°F. Daily temperatures swing about 15.2°F between overnight low and afternoon high. Daylight averages about 8h 49m. For travel, December is cold.
Avg High
32.7°F
Avg Low
17.5°F
Precipitation
2.10 in
Daylight
8h 49m
December records in Sussex
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 50.0°F (2017) | 8.1°F (2014) | 0.98 in (2015) |
| December 2 | 53.1°F (2012) | 6.1°F (2014) | 1.15 in (2018) |
| December 3 | 52.0°F (2012) | 10.9°F (2014) | 0.32 in (2023) |
| December 4 | 59.0°F (2012) | 3.0°F (2025) | 0.78 in (2011) |
| December 5 | 60.1°F (2017) | 1.0°F (2025) | 0.33 in (2016) |
| December 6 | 48.9°F (2015) | 6.1°F (2013) | 0.20 in (2021) |
| December 7 | 43.0°F (2012) | -2.9°F (2013) | 0.10 in (2025) |
| December 8 | 52.0°F (2023) | -2.9°F (2013) | 0.06 in (2014) |
| December 9 | 57.0°F (2023) | 7.0°F (2013) | 0.33 in (2013) |
| December 10 | 54.0°F (2024) | -5.1°F (2013) | 0.54 in (2012) |
| December 11 | 57.0°F (2020) | -2.9°F (2013) | 0.97 in (2021) |
| December 12 | 46.9°F (2011) | -8.0°F (2013) | 1.26 in (2010) |
| December 13 | 48.0°F (2021) | -5.1°F (2024) | 0.56 in (2010) |
| December 14 | 57.9°F (2015) | -8.0°F (2025) | 1.58 in (2015) |
| December 15 | 54.0°F (2015) | -9.0°F (2025) | 1.03 in (2022) |
| December 16 | 64.0°F (2021) | -8.0°F (2013) | 0.55 in (2012) |
| December 17 | 50.0°F (2015) | -8.0°F (2013) | 0.41 in (2016) |
| December 18 | 44.1°F (2023) | 1.0°F (2016) | 0.31 in (2016) |
| December 19 | 48.0°F (2025) | -11.9°F (2016) | 0.27 in (2012) |
| December 20 | 45.0°F (2017) | -9.9°F (2016) | 0.85 in (2012) |
| December 21 | 51.1°F (2015) | -0.9°F (2022) | 1.67 in (2012) |
| December 22 | 46.0°F (2019) | -2.0°F (2022) | 0.41 in (2015) |
| December 23 | 52.0°F (2019) | -11.0°F (2022) | 0.80 in (2014) |
| December 24 | 55.0°F (2015) | -11.9°F (2022) | 0.70 in (2015) |
| December 25 | 51.1°F (2023) | -6.0°F (2013) | 0.10 in (2013) |
| December 26 | 55.9°F (2019) | -9.9°F (2017) | 0.55 in (2016) |
| December 27 | 53.1°F (2019) | -9.9°F (2017) | 0.21 in (2015) |
| December 28 | 48.0°F (2018) | -9.9°F (2017) | 0.57 in (2018) |
| December 29 | 45.0°F (2019) | -2.9°F (2017) | 1.64 in (2015) |
| December 30 | 55.0°F (2019) | -14.1°F (2013) | 0.86 in (2020) |
| December 31 | 50.0°F (2024) | -15.0°F (2013) | 0.67 in (2011) |