August weather in Joliet, MT
The average temperature in Joliet in August is 66.1°F (47.9°F–84.3°F). Average precipitation: 0.88 inches.
August is a summer month in Joliet, and is warmer than the annual average of 43.7°F. Daily temperatures swing about 36.4°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 13h 56m. For travel, August is a comfortable month to visit.
Avg High
84.3°F
Avg Low
47.9°F
Precipitation
0.88 in
Daylight
13h 56m
August records in Joliet
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.9°F (2007) | 39.9°F (1968) | 1.10 in (1976) |
| August 2 | 100.9°F (2008) | 41.0°F (1968) | 1.12 in (1976) |
| August 3 | 102.9°F (1961) | 39.0°F (1978) | 0.84 in (1972) |
| August 4 | 102.0°F (2001) | 39.9°F (1980) | 0.48 in (1965) |
| August 5 | 104.0°F (1961) | 39.0°F (1980) | 0.32 in (1973) |
| August 6 | 100.9°F (1983) | 42.1°F (1969) | 0.49 in (2015) |
| August 7 | 100.9°F (1995) | 39.9°F (1969) | 0.51 in (1987) |
| August 8 | 100.9°F (2001) | 42.1°F (1973) | 0.36 in (1971) |
| August 9 | 98.1°F (1957) | 39.9°F (1960) | 0.30 in (1982) |
| August 10 | 102.0°F (1957) | 39.9°F (1974) | 0.99 in (1962) |
| August 11 | 97.0°F (1970) | 41.0°F (1961) | 0.20 in (1990) |
| August 12 | 100.0°F (1965) | 41.0°F (1977) | 0.22 in (1966) |
| August 13 | 102.9°F (2003) | 41.0°F (1973) | 0.43 in (1979) |
| August 14 | 100.0°F (1971) | 37.0°F (2005) | 0.35 in (1974) |
| August 15 | 100.0°F (2003) | 37.9°F (2005) | 2.00 in (1987) |
| August 16 | 100.0°F (2003) | 39.0°F (1968) | 1.45 in (1997) |
| August 17 | 96.1°F (1973) | 34.0°F (2002) | 0.15 in (1990) |
| August 18 | 100.9°F (2020) | 37.0°F (2002) | 0.66 in (1968) |
| August 19 | 98.1°F (2010) | 35.1°F (1968) | 0.94 in (2016) |
| August 20 | 98.1°F (2008) | 39.0°F (2015) | 0.97 in (1965) |
| August 21 | 97.0°F (1969) | 39.0°F (1968) | 0.84 in (2020) |
| August 22 | 100.0°F (2010) | 37.0°F (1966) | 0.40 in (1962) |
| August 23 | 99.0°F (1969) | 30.0°F (2015) | 1.68 in (2014) |
| August 24 | 99.0°F (1969) | 30.0°F (2015) | 0.56 in (1987) |
| August 25 | 97.0°F (1970) | 28.9°F (1992) | 0.43 in (1979) |
| August 26 | 100.0°F (2008) | 30.9°F (1992) | 0.27 in (1964) |
| August 27 | 100.0°F (2010) | 34.0°F (1976) | 0.42 in (1977) |
| August 28 | 96.1°F (2011) | 28.9°F (1960) | 0.70 in (1999) |
| August 29 | 97.0°F (2001) | 34.0°F (1965) | 0.27 in (1958) |
| August 30 | 98.1°F (2012) | 33.1°F (1993) | 0.50 in (1977) |
| August 31 | 97.0°F (1991) | 36.0°F (1993) | 0.35 in (2010) |