May weather in South Milwaukee, WI
The average temperature in South Milwaukee in May is 55.7°F (47.3°F–64.1°F). Average precipitation: 4.18 inches.
May is a spring month in South Milwaukee, and is warmer than the annual average of 48.4°F. Daily temperatures swing about 16.8°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 28m. For travel, May is a comfortable month to visit.
Avg High
64.1°F
Avg Low
47.3°F
Precipitation
4.18 in
Daylight
14h 28m
May records in South Milwaukee
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2013) | 34.0°F (2020) | 1.28 in (2017) |
| May 2 | 87.1°F (2021) | 37.0°F (2023) | 0.28 in (2012) |
| May 3 | 87.1°F (2021) | 34.0°F (2017) | 1.05 in (2018) |
| May 4 | 84.0°F (2012) | 37.0°F (2019) | 0.79 in (2022) |
| May 5 | 82.0°F (2010) | 37.0°F (2019) | 0.46 in (2024) |
| May 6 | 82.0°F (2018) | 37.9°F (2020) | 0.29 in (2021) |
| May 7 | 75.9°F (2016) | 39.9°F (2017) | 1.22 in (2012) |
| May 8 | 75.9°F (2009) | 34.0°F (2021) | 1.37 in (2024) |
| May 9 | 82.0°F (2015) | 30.0°F (2020) | 1.56 in (2019) |
| May 10 | 81.0°F (2018) | 30.9°F (2020) | 1.02 in (2013) |
| May 11 | 75.9°F (2022) | 35.1°F (2021) | 1.03 in (2016) |
| May 12 | 81.0°F (2022) | 34.0°F (2021) | 1.26 in (2018) |
| May 13 | 81.0°F (2014) | 34.0°F (2013) | 1.85 in (2014) |
| May 14 | 81.0°F (2014) | 42.1°F (2015) | 0.99 in (2018) |
| May 15 | 90.0°F (2007) | 36.0°F (2016) | 0.60 in (2020) |
| May 16 | 84.9°F (2012) | 37.9°F (2014) | 0.73 in (2007) |
| May 17 | 87.1°F (2017) | 39.9°F (2009) | 0.71 in (2020) |
| May 18 | 82.9°F (2017) | 39.9°F (2023) | 2.96 in (2020) |
| May 19 | 77.0°F (2015) | 39.9°F (2025) | 0.34 in (2020) |
| May 20 | 82.0°F (2009) | 39.0°F (2007) | 0.44 in (2024) |
| May 21 | 88.0°F (2013) | 39.9°F (2007) | 1.67 in (2025) |
| May 22 | 86.0°F (2014) | 44.1°F (2008) | 0.62 in (2019) |
| May 23 | 86.0°F (2021) | 39.9°F (2025) | 1.15 in (2013) |
| May 24 | 77.0°F (2007) | 41.0°F (2025) | 0.50 in (2017) |
| May 25 | 88.0°F (2007) | 42.1°F (2013) | 0.71 in (2024) |
| May 26 | 89.1°F (2018) | 39.0°F (2013) | 1.12 in (2022) |
| May 27 | 84.9°F (2016) | 41.0°F (2008) | 0.79 in (2022) |
| May 28 | 89.1°F (2018) | 39.9°F (2008) | 0.65 in (2013) |
| May 29 | 90.0°F (2012) | 41.0°F (2014) | 1.08 in (2024) |
| May 30 | 80.1°F (2016) | 37.9°F (2021) | 1.82 in (2008) |
| May 31 | 87.1°F (2011) | 42.1°F (2015) | 0.41 in (2015) |