August weather in Roundup, MT
The average temperature in Roundup in August is 69.5°F (51.1°F–87.9°F). Average precipitation: 1.21 inches.
August is a summer month in Roundup, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 36.8°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 13h 60m. For travel, August is a comfortable month to visit.
Avg High
87.9°F
Avg Low
51.1°F
Precipitation
1.21 in
Daylight
13h 60m
August records in Roundup
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 105.1°F (2008) | 32.0°F (1948) | 0.58 in (1978) |
| August 2 | 102.9°F (2008) | 39.9°F (1921) | 0.70 in (1972) |
| August 3 | 106.0°F (1934) | 37.9°F (1921) | 0.80 in (1943) |
| August 4 | 106.0°F (1941) | 35.1°F (1921) | 0.27 in (1977) |
| August 5 | 108.0°F (1961) | 35.1°F (1921) | 0.74 in (1954) |
| August 6 | 106.0°F (1983) | 39.9°F (1921) | 0.36 in (1916) |
| August 7 | 102.9°F (1971) | 39.9°F (1921) | 0.36 in (1939) |
| August 8 | 100.9°F (1971) | 39.9°F (1921) | 1.70 in (2009) |
| August 9 | 102.0°F (1940) | 39.9°F (1946) | 0.90 in (1980) |
| August 10 | 105.1°F (2003) | 39.9°F (1939) | 0.90 in (1953) |
| August 11 | 102.0°F (1984) | 39.0°F (1977) | 0.80 in (1951) |
| August 12 | 104.0°F (1940) | 39.9°F (1916) | 0.58 in (1999) |
| August 13 | 106.0°F (2003) | 39.9°F (1921) | 0.91 in (1991) |
| August 14 | 105.1°F (2003) | 39.0°F (2005) | 0.66 in (1954) |
| August 15 | 102.9°F (2003) | 39.0°F (1944) | 1.85 in (1968) |
| August 16 | 104.0°F (2003) | 39.9°F (1921) | 1.05 in (1985) |
| August 17 | 104.0°F (2003) | 32.0°F (1985) | 0.42 in (2015) |
| August 18 | 100.9°F (1943) | 36.0°F (1921) | 0.66 in (1957) |
| August 19 | 105.1°F (2008) | 36.0°F (1921) | 0.60 in (1935) |
| August 20 | 102.9°F (1942) | 33.1°F (1921) | 1.57 in (1990) |
| August 21 | 100.9°F (2010) | 35.1°F (1945) | 0.50 in (2014) |
| August 22 | 102.9°F (1937) | 33.1°F (1921) | 1.03 in (1973) |
| August 23 | 102.0°F (1969) | 34.0°F (2015) | 3.38 in (2014) |
| August 24 | 104.0°F (1969) | 32.0°F (1934) | 1.66 in (2014) |
| August 25 | 105.1°F (2008) | 30.0°F (1992) | 1.10 in (1987) |
| August 26 | 102.0°F (2010) | 36.0°F (1960) | 0.78 in (1990) |
| August 27 | 102.0°F (1971) | 39.9°F (1945) | 0.54 in (1956) |
| August 28 | 104.0°F (2012) | 37.9°F (1960) | 1.17 in (1956) |
| August 29 | 102.0°F (2012) | 39.9°F (1960) | 0.40 in (1932) |
| August 30 | 100.0°F (1954) | 34.0°F (1992) | 0.80 in (2010) |
| August 31 | 102.0°F (1940) | 32.0°F (1965) | 0.58 in (1986) |