May weather in Waterloo, WI
The average temperature in Waterloo in May is 57.8°F (46.4°F–69.2°F). Average precipitation: 4.23 inches.
May is a spring month in Waterloo, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 29m. For travel, May is a comfortable month to visit.
Avg High
69.2°F
Avg Low
46.4°F
Precipitation
4.23 in
Daylight
14h 29m
May records in Waterloo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2013) | 25.0°F (2015) | 0.80 in (2017) |
| May 2 | 88.0°F (2021) | 35.1°F (2023) | 1.07 in (2018) |
| May 3 | 84.0°F (2021) | 30.9°F (2017) | 0.79 in (2013) |
| May 4 | 78.1°F (2012) | 30.9°F (2011) | 1.73 in (2021) |
| May 5 | 80.1°F (2010) | 34.0°F (2021) | 0.24 in (2007) |
| May 6 | 79.0°F (2018) | 32.0°F (2020) | 0.60 in (2019) |
| May 7 | 84.9°F (2016) | 34.0°F (2017) | 1.08 in (2012) |
| May 8 | 82.0°F (2015) | 30.9°F (2017) | 1.35 in (2024) |
| May 9 | 84.9°F (2014) | 27.0°F (2020) | 1.21 in (2009) |
| May 10 | 82.0°F (2022) | 33.1°F (2010) | 1.95 in (2013) |
| May 11 | 89.1°F (2022) | 30.0°F (2021) | 0.63 in (2010) |
| May 12 | 88.0°F (2022) | 32.0°F (2020) | 0.75 in (2018) |
| May 13 | 91.9°F (2022) | 30.0°F (2020) | 1.22 in (2010) |
| May 14 | 91.9°F (2022) | 37.9°F (2015) | 1.05 in (2009) |
| May 15 | 88.0°F (2007) | 30.0°F (2016) | 0.28 in (2020) |
| May 16 | 84.9°F (2012) | 28.0°F (2016) | 0.71 in (2017) |
| May 17 | 84.9°F (2012) | 37.0°F (2009) | 0.57 in (2020) |
| May 18 | 84.9°F (2012) | 35.1°F (2016) | 1.21 in (2020) |
| May 19 | 84.9°F (2012) | 34.0°F (2008) | 0.23 in (2021) |
| May 20 | 89.1°F (2012) | 36.0°F (2015) | 0.49 in (2019) |
| May 21 | 88.0°F (2012) | 37.9°F (2008) | 1.48 in (2025) |
| May 22 | 84.0°F (2009) | 37.0°F (2008) | 1.39 in (2024) |
| May 23 | 84.9°F (2007) | 37.9°F (2022) | 1.46 in (2013) |
| May 24 | 89.1°F (2010) | 36.0°F (2013) | 0.30 in (2020) |
| May 25 | 91.9°F (2010) | 36.0°F (2013) | 1.72 in (2015) |
| May 26 | 86.0°F (2016) | 41.0°F (2013) | 1.03 in (2012) |
| May 27 | 91.0°F (2018) | 36.0°F (2011) | 1.02 in (2024) |
| May 28 | 93.9°F (2018) | 35.1°F (2008) | 0.65 in (2021) |
| May 29 | 93.9°F (2018) | 34.0°F (2021) | 1.11 in (2020) |
| May 30 | 91.9°F (2018) | 34.0°F (2021) | 0.78 in (2008) |
| May 31 | 90.0°F (2010) | 39.9°F (2009) | 0.72 in (2018) |