May weather in Chinook, MT
The average temperature in Chinook in May is 53.5°F (40.0°F–67.0°F). Average precipitation: 2.42 inches.
May is a spring month in Chinook, and is warmer than the annual average of 42.4°F. Daily temperatures swing about 27°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 15h 2m. For travel, May is a comfortable month to visit.
Avg High
67.0°F
Avg Low
40.0°F
Precipitation
2.42 in
Daylight
15h 2m
May records in Chinook
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1897) | 17.1°F (2013) | 1.32 in (1938) |
| May 2 | 90.0°F (1906) | 10.9°F (1954) | 0.99 in (1904) |
| May 3 | 88.0°F (1930) | 17.1°F (2005) | 0.73 in (1955) |
| May 4 | 89.1°F (1930) | 17.1°F (2005) | 1.49 in (1932) |
| May 5 | 91.0°F (1992) | 18.0°F (1942) | 1.18 in (1986) |
| May 6 | 95.0°F (1916) | 23.0°F (1977) | 1.44 in (1975) |
| May 7 | 93.0°F (1928) | 21.9°F (1907) | 1.60 in (2024) |
| May 8 | 90.0°F (1916) | 17.1°F (1945) | 1.65 in (1896) |
| May 9 | 89.1°F (1906) | 18.0°F (1907) | 1.56 in (1983) |
| May 10 | 93.9°F (1906) | 16.0°F (1946) | 1.52 in (1983) |
| May 11 | 91.0°F (1958) | 19.0°F (1901) | 1.30 in (2016) |
| May 12 | 91.0°F (1897) | 19.0°F (1901) | 1.50 in (1983) |
| May 13 | 95.0°F (1903) | 21.0°F (1943) | 1.82 in (1974) |
| May 14 | 97.0°F (1931) | 19.9°F (1916) | 1.23 in (1977) |
| May 15 | 96.1°F (1917) | 21.0°F (1923) | 0.90 in (1909) |
| May 16 | 98.1°F (1901) | 21.0°F (1942) | 1.23 in (1955) |
| May 17 | 91.0°F (1901) | 25.0°F (1943) | 2.36 in (1949) |
| May 18 | 89.1°F (2021) | 19.9°F (1942) | 0.92 in (2019) |
| May 19 | 93.9°F (2006) | 26.1°F (2015) | 1.10 in (2004) |
| May 20 | 96.1°F (1897) | 28.0°F (1979) | 1.31 in (1974) |
| May 21 | 96.1°F (1980) | 28.9°F (1965) | 1.73 in (1933) |
| May 22 | 95.0°F (1980) | 25.0°F (2022) | 1.75 in (2008) |
| May 23 | 98.1°F (1928) | 27.0°F (2022) | 0.85 in (2004) |
| May 24 | 98.1°F (1928) | 30.9°F (1954) | 1.14 in (2004) |
| May 25 | 95.0°F (1919) | 30.0°F (1932) | 1.20 in (1997) |
| May 26 | 98.1°F (1936) | 23.0°F (1918) | 0.85 in (1942) |
| May 27 | 97.0°F (1936) | 28.0°F (1947) | 1.49 in (1912) |
| May 28 | 97.0°F (1901) | 21.0°F (1947) | 1.50 in (2012) |
| May 29 | 98.1°F (1934) | 28.0°F (1947) | 1.04 in (1989) |
| May 30 | 98.1°F (1936) | 32.0°F (1979) | 1.10 in (1901) |
| May 31 | 97.0°F (1930) | 26.1°F (1982) | 0.89 in (1981) |