May weather in Joliet, MT
The average temperature in Joliet in May is 51.0°F (36.3°F–65.7°F). Average precipitation: 2.67 inches. Average snowfall is 0.8 inches.
May is a spring month in Joliet, and is warmer than the annual average of 43.7°F. Daily temperatures swing about 29.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 42m. For travel, May is cool.
Avg High
65.7°F
Avg Low
36.3°F
Precipitation
2.67 in
Snow
0.8 in
May records in Joliet
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (1981) | 18.0°F (1995) | 2.02 in (1997) |
| May 2 | 90.0°F (1985) | 18.0°F (2005) | 0.39 in (2008) |
| May 3 | 86.0°F (1986) | 19.9°F (2005) | 0.50 in (1990) |
| May 4 | 89.1°F (1966) | 18.0°F (1967) | 0.78 in (1959) |
| May 5 | 87.1°F (1966) | 21.0°F (1982) | 0.54 in (2007) |
| May 6 | 90.0°F (1966) | 25.0°F (1996) | 1.30 in (1984) |
| May 7 | 89.1°F (1966) | 23.0°F (1968) | 2.62 in (1988) |
| May 8 | 87.1°F (1987) | 19.0°F (2010) | 1.29 in (1970) |
| May 9 | 84.0°F (1987) | 19.9°F (2002) | 0.65 in (2011) |
| May 10 | 86.0°F (2012) | 19.9°F (2002) | 1.48 in (2011) |
| May 11 | 89.1°F (1960) | 15.1°F (1968) | 2.31 in (1981) |
| May 12 | 90.0°F (1960) | 21.0°F (2015) | 0.89 in (1963) |
| May 13 | 91.0°F (2001) | 21.9°F (1974) | 0.85 in (1995) |
| May 14 | 93.9°F (2001) | 26.1°F (2017) | 0.79 in (1968) |
| May 15 | 90.0°F (1978) | 19.9°F (1974) | 1.26 in (1961) |
| May 16 | 90.0°F (1988) | 21.0°F (1974) | 1.00 in (2015) |
| May 17 | 88.0°F (1988) | 23.0°F (2010) | 1.32 in (2000) |
| May 18 | 90.0°F (1992) | 26.1°F (1965) | 4.25 in (1978) |
| May 19 | 91.0°F (1992) | 25.0°F (1968) | 1.43 in (1978) |
| May 20 | 90.0°F (1958) | 24.1°F (1968) | 1.29 in (1957) |
| May 21 | 89.1°F (1980) | 28.9°F (1963) | 3.30 in (2011) |
| May 22 | 91.9°F (1980) | 28.9°F (1963) | 1.25 in (1981) |
| May 23 | 89.1°F (1980) | 26.1°F (2010) | 1.70 in (2018) |
| May 24 | 90.0°F (1985) | 28.0°F (2002) | 1.52 in (1996) |
| May 25 | 87.1°F (1958) | 30.0°F (1975) | 1.68 in (1962) |
| May 26 | 90.0°F (1969) | 28.9°F (1975) | 1.68 in (1962) |
| May 27 | 91.9°F (1969) | 30.0°F (1968) | 2.52 in (1987) |
| May 28 | 91.0°F (1958) | 30.9°F (2011) | 1.02 in (1956) |
| May 29 | 91.0°F (1988) | 30.0°F (1959) | 0.80 in (2013) |
| May 30 | 93.9°F (2003) | 28.9°F (2012) | 0.72 in (1971) |
| May 31 | 91.0°F (1986) | 25.0°F (1982) | 0.65 in (1978) |