August weather in Forsyth, MT
The average temperature in Forsyth in August is 71.1°F (55.8°F–86.5°F). Average precipitation: 1.19 inches.
August is a summer month in Forsyth, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 30.7°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 13h 59m. For travel, August is a comfortable month to visit.
Avg High
86.5°F
Avg Low
55.8°F
Precipitation
1.19 in
Daylight
13h 59m
August records in Forsyth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (2008) | 43.0°F (2009) | 0.40 in (2019) |
| August 2 | 102.9°F (2024) | 44.1°F (1985) | 3.49 in (1998) |
| August 3 | 102.0°F (2001) | 44.1°F (1991) | 0.35 in (2012) |
| August 4 | 102.9°F (2022) | 39.9°F (1978) | 0.43 in (1981) |
| August 5 | 99.0°F (1994) | 42.1°F (1978) | 0.54 in (2011) |
| August 6 | 102.0°F (1983) | 44.1°F (1981) | 0.58 in (2022) |
| August 7 | 105.1°F (1995) | 37.9°F (2025) | 1.55 in (2009) |
| August 8 | 100.0°F (2021) | 45.0°F (1980) | 0.46 in (2002) |
| August 9 | 100.0°F (2006) | 44.1°F (1985) | 0.51 in (2010) |
| August 10 | 100.9°F (2003) | 46.0°F (1986) | 0.15 in (2019) |
| August 11 | 105.1°F (1983) | 39.0°F (1977) | 0.87 in (2019) |
| August 12 | 102.9°F (2003) | 43.0°F (1992) | 0.77 in (1999) |
| August 13 | 102.0°F (2003) | 44.1°F (1992) | 0.46 in (2020) |
| August 14 | 102.9°F (2015) | 44.1°F (2005) | 1.67 in (1987) |
| August 15 | 102.0°F (2003) | 41.0°F (1985) | 0.89 in (1980) |
| August 16 | 104.0°F (2003) | 41.0°F (2012) | 0.53 in (1985) |
| August 17 | 100.9°F (1996) | 39.0°F (2002) | 0.17 in (2003) |
| August 18 | 100.9°F (1988) | 45.0°F (1987) | 1.32 in (1995) |
| August 19 | 100.0°F (2008) | 39.9°F (2004) | 0.70 in (2016) |
| August 20 | 97.0°F (2025) | 43.0°F (2005) | 1.21 in (2023) |
| August 21 | 102.9°F (2010) | 43.0°F (1984) | 0.43 in (1993) |
| August 22 | 102.9°F (1976) | 43.0°F (2008) | 0.22 in (1998) |
| August 23 | 100.0°F (1997) | 34.0°F (2015) | 3.04 in (2014) |
| August 24 | 100.9°F (1977) | 41.0°F (1992) | 1.21 in (2014) |
| August 25 | 100.9°F (2008) | 32.0°F (1992) | 0.47 in (1987) |
| August 26 | 100.0°F (2003) | 35.1°F (1992) | 0.60 in (2024) |
| August 27 | 100.9°F (1997) | 39.0°F (1976) | 0.57 in (2018) |
| August 28 | 100.0°F (2012) | 36.0°F (1988) | 1.73 in (1985) |
| August 29 | 100.0°F (2005) | 41.0°F (1988) | 0.30 in (2010) |
| August 30 | 97.0°F (1983) | 32.0°F (1992) | 0.54 in (2010) |
| August 31 | 98.1°F (1983) | 39.0°F (1993) | 0.31 in (1979) |