May weather in Fairfield, MT
The average temperature in Fairfield in May is 51.5°F (40.7°F–62.3°F). Average precipitation: 2.12 inches.
May is a spring month in Fairfield, and is warmer than the annual average of 44.4°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 55m. For travel, May is a comfortable month to visit.
Avg High
62.3°F
Avg Low
40.7°F
Precipitation
2.12 in
Daylight
14h 55m
May records in Fairfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 81.0°F (1968) | 12.0°F (1954) | 0.83 in (1964) |
| May 2 | 82.9°F (1985) | 10.9°F (1954) | 1.38 in (1964) |
| May 3 | 84.0°F (1966) | 12.9°F (1967) | 1.45 in (1964) |
| May 4 | 84.0°F (1966) | 17.1°F (1967) | 0.78 in (1952) |
| May 5 | 84.0°F (1992) | 21.0°F (1967) | 0.72 in (2025) |
| May 6 | 87.1°F (1992) | 23.0°F (1929) | 1.63 in (1995) |
| May 7 | 84.0°F (1987) | 23.0°F (1935) | 0.82 in (1975) |
| May 8 | 84.9°F (1987) | 24.1°F (1935) | 1.04 in (2024) |
| May 9 | 82.9°F (1994) | 24.1°F (2004) | 0.90 in (1983) |
| May 10 | 84.0°F (2025) | 18.0°F (1946) | 2.00 in (1975) |
| May 11 | 84.9°F (1993) | 23.0°F (1953) | 1.25 in (1970) |
| May 12 | 86.0°F (1960) | 19.0°F (1967) | 1.45 in (1995) |
| May 13 | 86.0°F (2001) | 23.0°F (1943) | 0.84 in (1955) |
| May 14 | 89.1°F (1936) | 27.0°F (1959) | 1.21 in (1955) |
| May 15 | 87.1°F (1936) | 23.0°F (1929) | 1.13 in (1984) |
| May 16 | 87.1°F (1988) | 27.0°F (1942) | 1.03 in (2015) |
| May 17 | 86.0°F (2006) | 28.0°F (1942) | 0.77 in (1961) |
| May 18 | 87.1°F (2006) | 28.0°F (1965) | 1.25 in (1938) |
| May 19 | 88.0°F (2006) | 26.1°F (1931) | 1.09 in (2020) |
| May 20 | 86.0°F (1964) | 24.1°F (2021) | 1.45 in (2021) |
| May 21 | 89.1°F (1980) | 21.0°F (2002) | 1.58 in (1927) |
| May 22 | 88.0°F (1980) | 28.0°F (1947) | 1.38 in (1981) |
| May 23 | 84.0°F (1941) | 28.9°F (1949) | 0.92 in (2008) |
| May 24 | 86.0°F (1941) | 28.0°F (1950) | 1.25 in (1997) |
| May 25 | 89.1°F (1928) | 28.9°F (1932) | 2.07 in (1953) |
| May 26 | 87.1°F (1936) | 28.0°F (1929) | 0.81 in (1942) |
| May 27 | 88.0°F (1936) | 32.0°F (1941) | 0.53 in (1987) |
| May 28 | 87.1°F (1936) | 21.0°F (1947) | 1.54 in (2006) |
| May 29 | 91.0°F (1986) | 28.0°F (1951) | 1.32 in (1953) |
| May 30 | 90.0°F (1986) | 30.0°F (1951) | 1.21 in (1949) |
| May 31 | 90.0°F (2025) | 30.0°F (1951) | 0.92 in (1941) |