May weather in Circle, MT
The average temperature in Circle in May is 55.0°F (41.7°F–68.3°F). Average precipitation: 2.55 inches.
May is a spring month in Circle, and is warmer than the annual average of 45.1°F. Daily temperatures swing about 26.6°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 14h 54m. For travel, May is a comfortable month to visit.
Avg High
68.3°F
Avg Low
41.7°F
Precipitation
2.55 in
Daylight
14h 54m
May records in Circle
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1968) | 19.0°F (1984) | 1.85 in (2008) |
| May 2 | 86.0°F (1981) | 18.0°F (1976) | 0.64 in (1972) |
| May 3 | 88.0°F (1985) | 17.1°F (2005) | 0.78 in (1964) |
| May 4 | 87.1°F (1985) | 19.0°F (2002) | 1.03 in (2007) |
| May 5 | 89.1°F (2016) | 21.0°F (1967) | 1.10 in (1986) |
| May 6 | 90.0°F (2017) | 26.1°F (2013) | 1.80 in (2024) |
| May 7 | 89.1°F (2017) | 23.0°F (1984) | 1.27 in (1975) |
| May 8 | 87.1°F (1987) | 21.0°F (1984) | 0.77 in (2005) |
| May 9 | 87.1°F (1977) | 23.0°F (1968) | 1.00 in (1986) |
| May 10 | 91.9°F (2025) | 21.9°F (1979) | 2.27 in (2011) |
| May 11 | 91.0°F (1977) | 19.9°F (1968) | 0.52 in (2023) |
| May 12 | 93.0°F (2025) | 24.1°F (1983) | 0.64 in (2005) |
| May 13 | 93.9°F (2001) | 21.0°F (2004) | 1.75 in (2022) |
| May 14 | 91.9°F (1977) | 21.9°F (2014) | 0.62 in (2007) |
| May 15 | 86.0°F (2001) | 28.0°F (2014) | 0.31 in (1966) |
| May 16 | 91.0°F (2012) | 21.9°F (2009) | 1.06 in (2015) |
| May 17 | 91.0°F (1964) | 21.0°F (2002) | 1.00 in (1987) |
| May 18 | 93.0°F (1972) | 21.9°F (2015) | 1.93 in (1977) |
| May 19 | 90.0°F (1992) | 21.0°F (1968) | 1.10 in (1978) |
| May 20 | 98.1°F (1964) | 21.0°F (1968) | 0.94 in (1982) |
| May 21 | 90.0°F (1966) | 28.0°F (2009) | 1.68 in (2021) |
| May 22 | 98.1°F (1980) | 27.0°F (2022) | 0.35 in (2010) |
| May 23 | 100.9°F (1980) | 28.9°F (2002) | 0.90 in (2007) |
| May 24 | 98.1°F (1980) | 28.9°F (2002) | 0.90 in (2010) |
| May 25 | 91.9°F (1985) | 28.0°F (2004) | 1.90 in (2010) |
| May 26 | 93.0°F (1966) | 30.0°F (1965) | 0.70 in (2007) |
| May 27 | 96.1°F (1969) | 26.1°F (1965) | 1.40 in (2018) |
| May 28 | 91.9°F (1969) | 33.1°F (2005) | 1.03 in (2023) |
| May 29 | 99.0°F (1988) | 30.0°F (2007) | 0.70 in (2001) |
| May 30 | 96.1°F (1988) | 28.9°F (2007) | 1.15 in (2013) |
| May 31 | 100.0°F (1984) | 30.0°F (1982) | 1.70 in (1978) |