May weather in St. Ignatius, MT
The average temperature in St. Ignatius in May is 54.8°F (41.0°F–68.6°F). Average precipitation: 2.30 inches.
May is a spring month in St. Ignatius, and is warmer than the annual average of 47.7°F. Daily temperatures swing about 27.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 53m. For travel, May is a comfortable month to visit.
Avg High
68.6°F
Avg Low
41.0°F
Precipitation
2.30 in
Daylight
14h 53m
May records in St. Ignatius
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 80.1°F (1981) | 19.0°F (1954) | 1.24 in (1951) |
| May 2 | 81.0°F (1940) | 26.1°F (1899) | 0.63 in (1961) |
| May 3 | 84.9°F (1966) | 23.0°F (2008) | 1.19 in (2007) |
| May 4 | 84.9°F (1966) | 25.0°F (1913) | 1.40 in (1986) |
| May 5 | 82.9°F (1966) | 23.0°F (2008) | 1.20 in (1961) |
| May 6 | 82.0°F (1990) | 25.0°F (1977) | 0.85 in (2024) |
| May 7 | 86.0°F (1992) | 24.1°F (1930) | 1.20 in (1980) |
| May 8 | 84.0°F (1987) | 21.9°F (1999) | 1.71 in (1948) |
| May 9 | 86.0°F (1987) | 26.1°F (1925) | 0.62 in (1980) |
| May 10 | 89.1°F (1940) | 23.0°F (1946) | 0.80 in (1920) |
| May 11 | 87.1°F (1940) | 26.1°F (1973) | 1.72 in (1970) |
| May 12 | 89.1°F (1949) | 23.0°F (2005) | 1.60 in (1958) |
| May 13 | 86.0°F (1931) | 24.1°F (1985) | 0.93 in (1951) |
| May 14 | 86.0°F (1993) | 24.1°F (1985) | 0.68 in (1951) |
| May 15 | 86.0°F (1924) | 23.0°F (1929) | 1.14 in (1981) |
| May 16 | 87.1°F (2006) | 27.0°F (1910) | 0.66 in (1917) |
| May 17 | 89.1°F (2006) | 27.0°F (1966) | 0.66 in (2005) |
| May 18 | 90.0°F (2008) | 26.1°F (1966) | 0.68 in (1959) |
| May 19 | 91.0°F (2006) | 28.9°F (1974) | 0.90 in (1939) |
| May 20 | 95.0°F (1986) | 28.9°F (1933) | 1.67 in (1957) |
| May 21 | 88.0°F (1958) | 28.0°F (1931) | 1.19 in (1915) |
| May 22 | 88.0°F (1919) | 26.1°F (1960) | 1.20 in (2002) |
| May 23 | 86.0°F (1940) | 26.1°F (1930) | 1.98 in (1980) |
| May 24 | 88.0°F (1940) | 28.0°F (2005) | 0.74 in (1981) |
| May 25 | 91.9°F (1928) | 26.1°F (1926) | 1.99 in (1980) |
| May 26 | 93.0°F (1966) | 24.1°F (1930) | 1.03 in (1980) |
| May 27 | 90.0°F (1966) | 30.0°F (1930) | 0.56 in (1998) |
| May 28 | 89.1°F (1934) | 28.9°F (1923) | 1.66 in (1898) |
| May 29 | 90.0°F (1986) | 26.1°F (1920) | 1.75 in (1919) |
| May 30 | 96.1°F (1936) | 28.0°F (1926) | 1.50 in (1985) |
| May 31 | 93.9°F (1936) | 28.0°F (1926) | 1.66 in (2000) |