May weather in Mason, WI
The average temperature in Mason in May is 51.5°F (38.6°F–64.4°F). Average precipitation: 3.45 inches.
May is a spring month in Mason, and is warmer than the annual average of 41.5°F. Daily temperatures swing about 25.8°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 48m. For travel, May is a comfortable month to visit.
Avg High
64.4°F
Avg Low
38.6°F
Precipitation
3.45 in
Daylight
14h 48m
May records in Mason
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (2021) | 25.0°F (2004) | 1.29 in (2017) |
| May 2 | 81.0°F (2012) | 21.9°F (2004) | 1.26 in (2008) |
| May 3 | 82.0°F (2000) | 21.0°F (2004) | 0.33 in (2013) |
| May 4 | 81.0°F (1999) | 24.3°F (2022) | 0.19 in (2013) |
| May 5 | 88.0°F (2000) | 24.1°F (2004) | 0.29 in (2003) |
| May 6 | 93.0°F (2016) | 26.2°F (2020) | 0.80 in (2012) |
| May 7 | 82.0°F (2015) | 23.2°F (2019) | 0.75 in (2014) |
| May 8 | 81.0°F (2007) | 25.2°F (2017) | 1.61 in (2002) |
| May 9 | 86.0°F (2025) | 25.2°F (2025) | 1.49 in (2003) |
| May 10 | 89.1°F (2007) | 25.2°F (2010) | 0.84 in (2001) |
| May 11 | 88.0°F (2025) | 25.2°F (2018) | 2.48 in (2003) |
| May 12 | 89.1°F (2025) | 21.2°F (2020) | 0.58 in (2006) |
| May 13 | 89.1°F (2025) | 24.3°F (2020) | 1.06 in (2010) |
| May 14 | 91.0°F (2007) | 27.0°F (2004) | 0.72 in (2007) |
| May 15 | 81.0°F (2013) | 24.1°F (2004) | 2.00 in (2017) |
| May 16 | 90.0°F (2018) | 26.2°F (2011) | 0.39 in (2004) |
| May 17 | 84.0°F (2021) | 26.2°F (2016) | 1.62 in (2017) |
| May 18 | 89.1°F (2012) | 27.0°F (2002) | 1.09 in (2013) |
| May 19 | 89.1°F (2012) | 23.0°F (2000) | 1.78 in (2013) |
| May 20 | 90.0°F (2009) | 24.1°F (2002) | 0.72 in (2013) |
| May 21 | 82.0°F (2016) | 27.0°F (2002) | 1.13 in (2024) |
| May 22 | 84.9°F (2016) | 30.2°F (2006) | 0.75 in (2013) |
| May 23 | 84.9°F (2023) | 32.0°F (2003) | 1.13 in (2016) |
| May 24 | 93.0°F (2010) | 29.1°F (2013) | 2.58 in (2012) |
| May 25 | 88.0°F (2018) | 29.1°F (2023) | 0.84 in (2022) |
| May 26 | 91.0°F (2018) | 29.1°F (2011) | 1.36 in (2020) |
| May 27 | 89.1°F (2018) | 28.2°F (2011) | 1.24 in (2012) |
| May 28 | 93.0°F (2006) | 27.1°F (2008) | 0.38 in (2022) |
| May 29 | 93.0°F (2006) | 25.2°F (2021) | 0.28 in (2007) |
| May 30 | 90.0°F (2002) | 30.2°F (2015) | 2.46 in (2018) |
| May 31 | 90.0°F (2023) | 29.1°F (2015) | 0.85 in (2016) |