May weather in Sister Bay, WI
The average temperature in Sister Bay in May is 53.2°F (41.9°F–64.5°F). Average precipitation: 3.46 inches.
May is a spring month in Sister Bay, and is warmer than the annual average of 44.7°F. Daily temperatures swing about 22.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 40m. For travel, May is a comfortable month to visit.
Avg High
64.5°F
Avg Low
41.9°F
Precipitation
3.46 in
Daylight
14h 40m
May records in Sister Bay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 64.0°F (2013) | 28.0°F (2015) | 0.76 in (2022) |
| May 2 | 78.1°F (2018) | 28.9°F (2023) | 0.83 in (2025) |
| May 3 | 75.0°F (2012) | 30.0°F (2017) | 0.75 in (2021) |
| May 4 | 73.9°F (2015) | 26.1°F (2011) | 1.10 in (2018) |
| May 5 | 70.0°F (2009) | 28.0°F (2014) | 0.49 in (2010) |
| May 6 | 73.0°F (2019) | 26.1°F (2020) | 0.15 in (2023) |
| May 7 | 72.0°F (2025) | 30.9°F (2011) | 1.15 in (2023) |
| May 8 | 75.0°F (2013) | 28.9°F (2020) | 2.27 in (2024) |
| May 9 | 77.0°F (2013) | 26.1°F (2017) | 0.93 in (2012) |
| May 10 | 70.0°F (2022) | 26.1°F (2010) | 0.38 in (2013) |
| May 11 | 73.9°F (2022) | 27.0°F (2018) | 1.59 in (2022) |
| May 12 | 78.1°F (2023) | 28.0°F (2020) | 0.71 in (2022) |
| May 13 | 75.9°F (2025) | 24.1°F (2020) | 0.14 in (2016) |
| May 14 | 75.0°F (2022) | 32.0°F (2015) | 0.94 in (2009) |
| May 15 | 79.0°F (2012) | 32.0°F (2023) | 0.23 in (2015) |
| May 16 | 80.1°F (2012) | 33.1°F (2014) | 1.07 in (2025) |
| May 17 | 81.0°F (2018) | 28.9°F (2014) | 0.35 in (2024) |
| May 18 | 78.1°F (2017) | 28.9°F (2016) | 1.87 in (2020) |
| May 19 | 75.9°F (2021) | 37.9°F (2015) | 1.45 in (2020) |
| May 20 | 81.0°F (2010) | 27.0°F (2015) | 0.81 in (2022) |
| May 21 | 82.0°F (2010) | 32.0°F (2018) | 0.43 in (2022) |
| May 22 | 78.1°F (2016) | 32.0°F (2015) | 0.51 in (2024) |
| May 23 | 82.0°F (2021) | 35.1°F (2022) | 1.40 in (2011) |
| May 24 | 82.0°F (2018) | 35.1°F (2022) | 0.36 in (2017) |
| May 25 | 84.9°F (2010) | 32.0°F (2013) | 0.81 in (2015) |
| May 26 | 88.0°F (2018) | 30.0°F (2023) | 1.55 in (2022) |
| May 27 | 84.9°F (2010) | 33.1°F (2023) | 1.15 in (2018) |
| May 28 | 84.9°F (2018) | 35.1°F (2021) | 1.35 in (2009) |
| May 29 | 84.0°F (2012) | 35.1°F (2021) | 1.10 in (2020) |
| May 30 | 77.0°F (2010) | 34.0°F (2021) | 0.30 in (2015) |
| May 31 | 84.0°F (2010) | 32.0°F (2009) | 0.50 in (2018) |