May weather in Long Lake, SD
The average temperature in Long Lake in May is 54.4°F (42.7°F–66.2°F). Average precipitation: 2.92 inches.
May is a spring month in Long Lake, and is warmer than the annual average of 41.9°F. Daily temperatures swing about 23.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 44m. For travel, May is a comfortable month to visit.
Avg High
66.2°F
Avg Low
42.7°F
Precipitation
2.92 in
Daylight
14h 44m
May records in Long Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 81.9°F (2021) | 25.2°F (2011) | 0.26 in (2008) |
| May 2 | 84.9°F (2015) | 20.7°F (2013) | 0.33 in (2024) |
| May 3 | 75.9°F (2023) | 18.9°F (2013) | 0.00 in (2008) |
| May 4 | 80.6°F (2018) | 26.4°F (2013) | 1.51 in (2020) |
| May 5 | 84.4°F (2016) | 32.9°F (2021) | 0.17 in (2012) |
| May 6 | 83.1°F (2016) | 30.9°F (2021) | 1.55 in (2023) |
| May 7 | 84.9°F (2017) | 27.7°F (2019) | 0.35 in (2010) |
| May 8 | 78.8°F (2025) | 25.7°F (2020) | 0.42 in (2021) |
| May 9 | 79.9°F (2025) | 29.5°F (2020) | 0.70 in (2016) |
| May 10 | 84.7°F (2025) | 26.8°F (2009) | 2.54 in (2015) |
| May 11 | 89.6°F (2025) | 27.0°F (2008) | 0.69 in (2015) |
| May 12 | 91.6°F (2025) | 29.5°F (2020) | 0.78 in (2023) |
| May 13 | 89.2°F (2025) | 28.9°F (2016) | 0.76 in (2023) |
| May 14 | 86.2°F (2025) | 29.1°F (2014) | 0.26 in (2015) |
| May 15 | 80.4°F (2019) | 25.5°F (2014) | 0.97 in (2025) |
| May 16 | 84.6°F (2018) | 27.1°F (2009) | 0.97 in (2017) |
| May 17 | 85.1°F (2024) | 32.4°F (2015) | 1.09 in (2018) |
| May 18 | 87.4°F (2012) | 30.9°F (2015) | 0.60 in (2019) |
| May 19 | 82.9°F (2021) | 35.8°F (2025) | 1.06 in (2025) |
| May 20 | 79.2°F (2021) | 31.5°F (2022) | 1.56 in (2013) |
| May 21 | 76.6°F (2023) | 31.3°F (2022) | 0.62 in (2011) |
| May 22 | 82.6°F (2012) | 31.8°F (2022) | 2.03 in (2010) |
| May 23 | 83.7°F (2023) | 38.1°F (2017) | 0.34 in (2024) |
| May 24 | 84.2°F (2018) | 35.6°F (2017) | 0.99 in (2010) |
| May 25 | 86.7°F (2018) | 38.1°F (2012) | 0.42 in (2016) |
| May 26 | 88.3°F (2018) | 34.5°F (2008) | 0.45 in (2012) |
| May 27 | 92.7°F (2018) | 34.2°F (2008) | 0.62 in (2014) |
| May 28 | 84.7°F (2010) | 32.2°F (2021) | 0.40 in (2015) |
| May 29 | 84.2°F (2018) | 39.2°F (2020) | 0.82 in (2010) |
| May 30 | 83.8°F (2023) | 32.7°F (2015) | 0.67 in (2022) |
| May 31 | 83.8°F (2018) | 35.1°F (2012) | 0.24 in (2014) |