December weather in Pewaukee, WI
The average temperature in Pewaukee in December is 25.9°F (18.7°F–33.1°F). Average precipitation: 1.96 inches.
December is a winter month in Pewaukee, and is cooler than the annual average of 46.6°F. Daily temperatures swing about 14.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 8h 50m. For travel, December is cold.
Avg High
33.1°F
Avg Low
18.7°F
Precipitation
1.96 in
Daylight
8h 50m
December records in Pewaukee
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 50.0°F (2017) | 9.0°F (2025) | 0.70 in (2015) |
| December 2 | 55.9°F (2012) | 8.1°F (2014) | 1.41 in (2007) |
| December 3 | 55.0°F (2012) | 12.0°F (2010) | 0.30 in (2014) |
| December 4 | 64.0°F (2012) | 3.0°F (2025) | 0.56 in (2011) |
| December 5 | 62.1°F (2017) | 1.9°F (2008) | 0.30 in (2016) |
| December 6 | 46.9°F (2015) | -0.9°F (2007) | 0.36 in (2021) |
| December 7 | 44.1°F (2015) | -0.9°F (2008) | 0.15 in (2025) |
| December 8 | 51.1°F (2023) | 1.9°F (2008) | 0.11 in (2014) |
| December 9 | 55.0°F (2023) | 5.0°F (2010) | 0.90 in (2009) |
| December 10 | 53.1°F (2015) | -5.1°F (2013) | 0.41 in (2025) |
| December 11 | 55.0°F (2015) | -2.0°F (2009) | 0.91 in (2021) |
| December 12 | 45.0°F (2015) | -5.1°F (2013) | 0.94 in (2010) |
| December 13 | 57.0°F (2015) | -2.0°F (2024) | 0.41 in (2015) |
| December 14 | 60.1°F (2015) | -7.1°F (2025) | 1.32 in (2015) |
| December 15 | 54.0°F (2015) | -7.1°F (2025) | 0.95 in (2022) |
| December 16 | 64.9°F (2021) | -5.1°F (2013) | 0.45 in (2012) |
| December 17 | 51.1°F (2015) | -2.0°F (2008) | 0.37 in (2016) |
| December 18 | 42.1°F (2025) | -0.9°F (2016) | 0.26 in (2016) |
| December 19 | 48.0°F (2025) | -9.0°F (2016) | 0.75 in (2008) |
| December 20 | 45.0°F (2017) | -2.9°F (2016) | 0.87 in (2012) |
| December 21 | 48.9°F (2015) | -8.0°F (2008) | 1.12 in (2012) |
| December 22 | 46.0°F (2019) | -8.0°F (2008) | 0.38 in (2015) |
| December 23 | 53.1°F (2019) | -8.0°F (2022) | 0.60 in (2014) |
| December 24 | 57.0°F (2015) | -8.0°F (2022) | 0.57 in (2015) |
| December 25 | 50.0°F (2023) | -5.1°F (2013) | 1.30 in (2009) |
| December 26 | 55.9°F (2019) | -6.0°F (2017) | 0.42 in (2016) |
| December 27 | 55.0°F (2019) | -7.1°F (2017) | 0.30 in (2021) |
| December 28 | 51.1°F (2008) | -7.1°F (2017) | 1.03 in (2008) |
| December 29 | 50.0°F (2024) | 1.0°F (2017) | 0.95 in (2019) |
| December 30 | 55.9°F (2022) | -9.0°F (2013) | 0.45 in (2019) |
| December 31 | 50.0°F (2010) | -9.0°F (2013) | 1.00 in (2011) |