December weather in South Milwaukee, WI
The average temperature in South Milwaukee in December is 29.0°F (22.1°F–35.8°F). Average precipitation: 1.90 inches.
December is a winter month in South Milwaukee, and is cooler than the annual average of 48.4°F. Daily temperatures swing about 13.7°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 51m. For travel, December is cold.
Avg High
35.8°F
Avg Low
22.1°F
Precipitation
1.90 in
Daylight
8h 51m
December records in South Milwaukee
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 53.1°F (2017) | 14.0°F (2014) | 0.63 in (2015) |
| December 2 | 59.0°F (2012) | 12.9°F (2006) | 1.22 in (2018) |
| December 3 | 60.1°F (2012) | 7.0°F (2006) | 0.30 in (2023) |
| December 4 | 66.0°F (2012) | 7.0°F (2006) | 0.33 in (2012) |
| December 5 | 63.0°F (2017) | 3.9°F (2008) | 0.51 in (2007) |
| December 6 | 48.0°F (2015) | 1.9°F (2007) | 0.40 in (2008) |
| December 7 | 44.1°F (2012) | 1.9°F (2007) | 0.25 in (2025) |
| December 8 | 51.1°F (2024) | 5.0°F (2006) | 0.22 in (2012) |
| December 9 | 57.9°F (2023) | 9.0°F (2007) | 1.02 in (2009) |
| December 10 | 55.0°F (2024) | -4.0°F (2013) | 0.51 in (2022) |
| December 11 | 57.9°F (2015) | 5.0°F (2013) | 1.07 in (2021) |
| December 12 | 48.0°F (2015) | 1.0°F (2024) | 1.12 in (2020) |
| December 13 | 57.9°F (2015) | -2.0°F (2013) | 0.28 in (2020) |
| December 14 | 57.0°F (2015) | -2.0°F (2025) | 1.23 in (2015) |
| December 15 | 57.0°F (2015) | 0.0°F (2016) | 1.43 in (2022) |
| December 16 | 66.9°F (2021) | 0.0°F (2013) | 0.32 in (2012) |
| December 17 | 53.1°F (2015) | 1.0°F (2008) | 0.21 in (2023) |
| December 18 | 48.9°F (2006) | 3.9°F (2016) | 0.15 in (2016) |
| December 19 | 48.9°F (2025) | -8.0°F (2016) | 0.45 in (2008) |
| December 20 | 48.0°F (2017) | -6.0°F (2016) | 1.03 in (2012) |
| December 21 | 53.1°F (2015) | 1.9°F (2025) | 1.44 in (2012) |
| December 22 | 48.9°F (2019) | -6.0°F (2008) | 0.31 in (2013) |
| December 23 | 55.0°F (2019) | -9.0°F (2022) | 0.96 in (2006) |
| December 24 | 57.9°F (2015) | -9.0°F (2022) | 0.44 in (2015) |
| December 25 | 48.0°F (2021) | -0.9°F (2008) | 1.18 in (2009) |
| December 26 | 57.9°F (2019) | -2.9°F (2017) | 0.31 in (2016) |
| December 27 | 59.0°F (2019) | -5.1°F (2017) | 0.50 in (2021) |
| December 28 | 55.0°F (2008) | -4.0°F (2017) | 0.86 in (2008) |
| December 29 | 53.1°F (2024) | 5.0°F (2017) | 1.17 in (2019) |
| December 30 | 60.1°F (2022) | -5.1°F (2013) | 0.52 in (2019) |
| December 31 | 51.1°F (2024) | -5.1°F (2013) | 0.42 in (2011) |