August weather in Plains, MT
The average temperature in Plains in August is 66.0°F (45.3°F–86.7°F). Average precipitation: inches.
August is a summer month in Plains, and is warmer than the annual average of 46.2°F. Daily temperatures swing about 41.4°F between overnight low and afternoon high. Daylight averages about 14h 4m. For travel, August is a comfortable month to visit.
Avg High
86.7°F
Avg Low
45.3°F
Precipitation
in
Daylight
14h 4m
August records in Plains
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (1961) | 28.9°F (2010) | 1.17 in (1998) |
| August 2 | 105.1°F (1961) | 32.0°F (2010) | 0.55 in (2013) |
| August 3 | 107.1°F (1961) | 33.1°F (1963) | 0.59 in (1965) |
| August 4 | 108.0°F (1961) | 35.1°F (2010) | 0.23 in (1984) |
| August 5 | 105.1°F (1961) | 32.0°F (2010) | 0.45 in (2009) |
| August 6 | 100.9°F (1983) | 30.0°F (1969) | 0.43 in (1984) |
| August 7 | 104.0°F (1990) | 32.0°F (1969) | 0.95 in (2009) |
| August 8 | 100.9°F (1983) | 35.1°F (1967) | 0.20 in (1985) |
| August 9 | 100.0°F (1972) | 34.0°F (1975) | 0.30 in (1974) |
| August 10 | 98.1°F (1967) | 19.0°F (2010) | 0.50 in (1985) |
| August 11 | 100.0°F (1971) | 32.0°F (1970) | 0.40 in (1983) |
| August 12 | 100.9°F (1967) | 26.1°F (2010) | 0.33 in (1965) |
| August 13 | 100.0°F (1967) | 28.9°F (1970) | 0.50 in (2009) |
| August 14 | 100.0°F (1994) | 27.0°F (2010) | 0.57 in (2009) |
| August 15 | 100.0°F (1967) | 21.9°F (1988) | 0.61 in (1976) |
| August 16 | 100.0°F (1962) | 24.1°F (2010) | 0.34 in (1972) |
| August 17 | 102.0°F (1967) | 28.9°F (1969) | 0.50 in (2006) |
| August 18 | 102.9°F (1967) | 30.9°F (1970) | 0.24 in (1990) |
| August 19 | 102.9°F (1967) | 28.0°F (1994) | 0.52 in (1975) |
| August 20 | 102.0°F (1967) | 32.0°F (1970) | 0.69 in (2004) |
| August 21 | 102.0°F (1967) | 28.9°F (1966) | 0.48 in (2008) |
| August 22 | 104.0°F (1969) | 30.0°F (1966) | 1.22 in (1992) |
| August 23 | 105.1°F (1969) | 30.9°F (1966) | 0.48 in (1975) |
| August 24 | 106.0°F (1969) | 28.0°F (2010) | 0.83 in (1979) |
| August 25 | 102.0°F (1969) | 28.0°F (1993) | 0.48 in (1979) |
| August 26 | 100.0°F (1981) | 30.9°F (1993) | 1.00 in (2004) |
| August 27 | 102.0°F (1981) | 30.0°F (1963) | 1.12 in (1966) |
| August 28 | 96.1°F (1971) | 28.9°F (2010) | 0.67 in (1964) |
| August 29 | 95.0°F (1998) | 23.0°F (2010) | 0.45 in (2010) |
| August 30 | 95.0°F (1972) | 16.0°F (2010) | 0.38 in (1971) |
| August 31 | 99.0°F (1967) | 21.0°F (1994) | 0.73 in (1986) |