May weather in Shelby, MT
The average temperature in Shelby in May is 51.2°F (38.0°F–64.4°F). Average precipitation: 1.77 inches. Average snowfall is 1.9 inches.
May is a spring month in Shelby, and is warmer than the annual average of 42.2°F. Daily temperatures swing about 26.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 15h 1m. For travel, May is a comfortable month to visit.
Avg High
64.4°F
Avg Low
38.0°F
Precipitation
1.77 in
Snow
1.9 in
May records in Shelby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 82.9°F (2000) | 16.0°F (2013) | 0.39 in (1951) |
| May 2 | 84.9°F (1957) | 12.0°F (1954) | 0.91 in (1951) |
| May 3 | 82.0°F (1998) | 19.9°F (1956) | 0.56 in (2003) |
| May 4 | 86.0°F (2016) | 18.0°F (2001) | 0.91 in (1952) |
| May 5 | 86.0°F (1996) | 24.1°F (1996) | 0.36 in (2019) |
| May 6 | 86.0°F (1953) | 21.9°F (2010) | 0.39 in (1995) |
| May 7 | 84.0°F (1953) | 23.0°F (2003) | 0.85 in (2002) |
| May 8 | 80.1°F (2007) | 26.1°F (1996) | 0.86 in (2024) |
| May 9 | 81.0°F (2016) | 19.9°F (2002) | 0.27 in (2010) |
| May 10 | 81.0°F (2025) | 24.1°F (2008) | 0.76 in (2004) |
| May 11 | 82.9°F (2025) | 19.9°F (2012) | 0.52 in (2004) |
| May 12 | 86.0°F (2007) | 19.9°F (2012) | 0.94 in (1995) |
| May 13 | 82.0°F (2001) | 21.9°F (1956) | 0.37 in (2016) |
| May 14 | 82.0°F (2013) | 26.1°F (2000) | 0.87 in (1955) |
| May 15 | 84.0°F (1997) | 19.9°F (1955) | 0.45 in (2025) |
| May 16 | 88.0°F (2012) | 28.0°F (2002) | 0.67 in (1955) |
| May 17 | 89.1°F (2006) | 26.1°F (1955) | 1.30 in (1996) |
| May 18 | 90.0°F (2006) | 28.9°F (2011) | 0.56 in (2018) |
| May 19 | 87.1°F (1954) | 28.0°F (1997) | 0.43 in (1953) |
| May 20 | 86.0°F (1958) | 28.0°F (2003) | 1.18 in (2021) |
| May 21 | 84.9°F (1958) | 27.0°F (2001) | 1.10 in (2020) |
| May 22 | 87.1°F (1951) | 24.1°F (2022) | 1.70 in (2002) |
| May 23 | 87.1°F (2001) | 25.0°F (1957) | 1.37 in (2008) |
| May 24 | 91.0°F (2001) | 28.0°F (1950) | 0.73 in (2011) |
| May 25 | 89.1°F (2003) | 30.9°F (1955) | 1.31 in (1997) |
| May 26 | 86.0°F (1998) | 32.0°F (2007) | 0.56 in (1997) |
| May 27 | 84.0°F (1958) | 30.9°F (1995) | 0.91 in (1953) |
| May 28 | 90.0°F (1958) | 25.0°F (1955) | 0.67 in (2006) |
| May 29 | 87.1°F (2025) | 23.0°F (1951) | 0.65 in (2010) |
| May 30 | 89.1°F (2025) | 32.0°F (1951) | 0.56 in (2013) |
| May 31 | 84.9°F (1956) | 30.9°F (1952) | 1.01 in (2000) |