December weather in Mukwonago, WI
The average temperature in Mukwonago in December is 26.2°F (18.2°F–34.1°F). Average precipitation: 1.93 inches.
December is a winter month in Mukwonago, and is cooler than the annual average of 46.7°F. Daily temperatures swing about 15.9°F between overnight low and afternoon high. Daylight averages about 8h 51m. For travel, December is cold.
Avg High
34.1°F
Avg Low
18.2°F
Precipitation
1.93 in
Daylight
8h 51m
December records in Mukwonago
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 50.0°F (2017) | 6.1°F (2025) | 0.79 in (2015) |
| December 2 | 57.0°F (2012) | 7.0°F (2025) | 0.86 in (2018) |
| December 3 | 57.9°F (2012) | 14.0°F (2025) | 0.38 in (2018) |
| December 4 | 66.9°F (2012) | 1.9°F (2025) | 0.36 in (2012) |
| December 5 | 63.0°F (2017) | 0.0°F (2025) | 0.35 in (2016) |
| December 6 | 43.0°F (2015) | 9.0°F (2021) | 0.22 in (2021) |
| December 7 | 46.0°F (2015) | 0.0°F (2013) | 0.27 in (2025) |
| December 8 | 51.1°F (2023) | 0.0°F (2013) | 0.05 in (2012) |
| December 9 | 55.9°F (2023) | 7.0°F (2018) | 0.35 in (2023) |
| December 10 | 53.1°F (2024) | -9.0°F (2013) | 0.50 in (2022) |
| December 11 | 55.0°F (2015) | -7.1°F (2013) | 1.18 in (2021) |
| December 12 | 55.0°F (2015) | -7.1°F (2013) | 1.50 in (2020) |
| December 13 | 48.9°F (2015) | -2.9°F (2013) | 0.08 in (2015) |
| December 14 | 59.0°F (2015) | -6.0°F (2025) | 1.30 in (2015) |
| December 15 | 57.0°F (2015) | -6.0°F (2016) | 1.30 in (2022) |
| December 16 | 66.0°F (2021) | -6.0°F (2016) | 0.22 in (2012) |
| December 17 | 50.0°F (2015) | -6.0°F (2013) | 0.33 in (2016) |
| December 18 | 43.0°F (2023) | -2.9°F (2016) | 0.20 in (2016) |
| December 19 | 48.9°F (2025) | -14.1°F (2016) | 0.05 in (2025) |
| December 20 | 46.0°F (2018) | -14.1°F (2016) | 0.62 in (2012) |
| December 21 | 48.0°F (2015) | 1.9°F (2022) | 1.52 in (2012) |
| December 22 | 50.0°F (2019) | 1.0°F (2022) | 0.63 in (2013) |
| December 23 | 53.1°F (2019) | -13.0°F (2022) | 0.57 in (2014) |
| December 24 | 60.1°F (2020) | -11.9°F (2022) | 0.78 in (2015) |
| December 25 | 52.0°F (2023) | -7.1°F (2013) | 0.09 in (2017) |
| December 26 | 55.9°F (2019) | -9.0°F (2017) | 0.22 in (2023) |
| December 27 | 57.0°F (2019) | -9.9°F (2017) | 0.40 in (2021) |
| December 28 | 50.0°F (2018) | -17.0°F (2017) | 0.43 in (2018) |
| December 29 | 48.9°F (2019) | -2.0°F (2017) | 1.90 in (2015) |
| December 30 | 55.9°F (2022) | -8.0°F (2013) | 0.50 in (2020) |
| December 31 | 43.0°F (2024) | -11.0°F (2013) | 0.51 in (2011) |