May weather in Hardin, MT
The average temperature in Hardin in May is 56.3°F (41.2°F–71.4°F). Average precipitation: 2.52 inches.
May is a spring month in Hardin, and is warmer than the annual average of 47.7°F. Daily temperatures swing about 30.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 44m. For travel, May is a comfortable month to visit.
Avg High
71.4°F
Avg Low
41.2°F
Precipitation
2.52 in
Daylight
14h 44m
May records in Hardin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1987) | 19.0°F (1949) | 0.55 in (1988) |
| May 2 | 87.1°F (1982) | 18.0°F (2005) | 1.00 in (1987) |
| May 3 | 88.0°F (1986) | 18.0°F (1954) | 0.72 in (1955) |
| May 4 | 90.0°F (1986) | 21.0°F (2024) | 1.05 in (2003) |
| May 5 | 90.0°F (1966) | 23.0°F (2013) | 1.20 in (1976) |
| May 6 | 91.0°F (1966) | 27.0°F (1967) | 1.12 in (2024) |
| May 7 | 91.0°F (1966) | 28.9°F (1959) | 2.30 in (1988) |
| May 8 | 91.9°F (1987) | 27.0°F (2010) | 1.36 in (2024) |
| May 9 | 93.9°F (1987) | 23.0°F (2002) | 1.13 in (2011) |
| May 10 | 90.0°F (1987) | 27.0°F (2022) | 1.10 in (2011) |
| May 11 | 91.0°F (2025) | 19.9°F (1953) | 1.25 in (2005) |
| May 12 | 93.0°F (2001) | 15.1°F (1953) | 2.50 in (2010) |
| May 13 | 97.0°F (1960) | 24.1°F (1953) | 1.00 in (1994) |
| May 14 | 93.9°F (2001) | 21.0°F (1953) | 0.66 in (2025) |
| May 15 | 95.0°F (1987) | 25.0°F (1953) | 0.93 in (1968) |
| May 16 | 93.0°F (1972) | 28.0°F (1974) | 0.75 in (1977) |
| May 17 | 93.9°F (1988) | 30.9°F (1952) | 0.90 in (2019) |
| May 18 | 93.0°F (2006) | 30.0°F (1953) | 2.15 in (1978) |
| May 19 | 93.9°F (1954) | 28.0°F (1968) | 1.50 in (1978) |
| May 20 | 95.0°F (2009) | 30.0°F (1968) | 1.03 in (2011) |
| May 21 | 95.0°F (1980) | 28.0°F (1963) | 1.70 in (1952) |
| May 22 | 97.0°F (1980) | 28.0°F (2022) | 1.88 in (2007) |
| May 23 | 93.9°F (1980) | 26.1°F (1953) | 0.48 in (1966) |
| May 24 | 95.0°F (1992) | 28.0°F (1984) | 0.90 in (2010) |
| May 25 | 90.0°F (1983) | 24.1°F (1984) | 1.42 in (1980) |
| May 26 | 91.9°F (1998) | 32.0°F (2004) | 0.53 in (1987) |
| May 27 | 95.0°F (1969) | 30.0°F (1965) | 1.69 in (2023) |
| May 28 | 93.9°F (1966) | 35.1°F (1995) | 0.85 in (2018) |
| May 29 | 95.0°F (2003) | 32.0°F (1954) | 1.23 in (2015) |
| May 30 | 97.0°F (1984) | 30.9°F (1979) | 1.10 in (1971) |
| May 31 | 95.0°F (1986) | 28.9°F (1982) | 1.20 in (2007) |