May weather in Hartville, WY
The average temperature in Hartville in May is 55.8°F (42.5°F–69.0°F). Average precipitation: 3.05 inches.
May is a spring month in Hartville, and is warmer than the annual average of 48.6°F. Daily temperatures swing about 26.5°F between overnight low and afternoon high. Daylight averages about 14h 24m. For travel, May is a comfortable month to visit.
Avg High
69.0°F
Avg Low
42.5°F
Precipitation
3.05 in
Daylight
14h 24m
May records in Hartville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 81.0°F (2021) | 26.1°F (2013) | 0.72 in (1973) |
| May 2 | 75.9°F (2023) | 27.0°F (2019) | 0.58 in (2022) |
| May 3 | 82.0°F (2023) | 27.0°F (1974) | 0.63 in (1969) |
| May 4 | 82.0°F (2025) | 28.9°F (2021) | 0.92 in (1981) |
| May 5 | 84.9°F (2014) | 33.1°F (1974) | 1.48 in (1971) |
| May 6 | 84.0°F (1963) | 25.0°F (2013) | 1.11 in (1971) |
| May 7 | 87.1°F (1963) | 37.9°F (2019) | 0.51 in (1986) |
| May 8 | 87.1°F (2017) | 34.0°F (2020) | 1.13 in (1965) |
| May 9 | 86.0°F (2016) | 33.1°F (2021) | 1.12 in (1972) |
| May 10 | 81.0°F (2025) | 30.9°F (2019) | 0.95 in (2018) |
| May 11 | 84.9°F (2025) | 28.9°F (2015) | 0.87 in (1980) |
| May 12 | 90.0°F (2025) | 32.0°F (1974) | 0.94 in (1980) |
| May 13 | 91.9°F (2013) | 30.9°F (2014) | 1.65 in (1982) |
| May 14 | 93.9°F (2013) | 27.0°F (1970) | 2.01 in (1989) |
| May 15 | 91.9°F (2013) | 30.9°F (1970) | 0.27 in (1980) |
| May 16 | 86.0°F (2017) | 34.0°F (2016) | 2.50 in (1991) |
| May 17 | 87.1°F (1970) | 36.0°F (2016) | 1.86 in (1983) |
| May 18 | 89.1°F (1970) | 30.0°F (2017) | 1.30 in (2017) |
| May 19 | 90.0°F (2020) | 33.1°F (2015) | 1.85 in (1988) |
| May 20 | 90.0°F (2013) | 30.0°F (2015) | 0.63 in (2013) |
| May 21 | 79.0°F (2023) | 32.0°F (2019) | 0.73 in (2019) |
| May 22 | 82.9°F (2020) | 28.0°F (2022) | 0.63 in (1976) |
| May 23 | 82.0°F (2023) | 30.9°F (2019) | 1.21 in (1976) |
| May 24 | 81.0°F (2018) | 35.1°F (2021) | 1.04 in (1965) |
| May 25 | 84.9°F (2018) | 32.0°F (2016) | 0.76 in (2025) |
| May 26 | 91.0°F (2018) | 28.0°F (2016) | 0.40 in (1976) |
| May 27 | 87.1°F (1974) | 39.9°F (2015) | 0.72 in (2019) |
| May 28 | 88.0°F (2013) | 43.0°F (2024) | 0.96 in (2019) |
| May 29 | 87.1°F (2024) | 39.0°F (2017) | 0.64 in (1964) |
| May 30 | 82.0°F (1963) | 42.1°F (2019) | 0.73 in (1964) |
| May 31 | 84.9°F (2023) | 30.0°F (2016) | 0.46 in (1983) |