August weather in Boulder, UT
The average temperature in Boulder in August is 70.4°F (59.6°F–81.2°F). Average precipitation: 1.73 inches.
August is a summer month in Boulder, and is warmer than the annual average of 50.3°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 28m. For travel, August is a comfortable month to visit.
Avg High
81.2°F
Avg Low
59.6°F
Precipitation
1.73 in
Daylight
13h 28m
August records in Boulder
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.9°F (1979) | 52.0°F (1965) | 1.12 in (1964) |
| August 2 | 93.9°F (2000) | 48.9°F (1968) | 0.44 in (2003) |
| August 3 | 93.9°F (2000) | 45.0°F (1974) | 0.61 in (2002) |
| August 4 | 93.0°F (1979) | 46.0°F (1956) | 1.37 in (1970) |
| August 5 | 91.9°F (1979) | 23.0°F (1991) | 0.59 in (1988) |
| August 6 | 93.9°F (1981) | 48.0°F (1962) | 0.90 in (1983) |
| August 7 | 91.9°F (1978) | 45.0°F (1956) | 0.55 in (2004) |
| August 8 | 93.0°F (1960) | 48.0°F (2009) | 0.52 in (1971) |
| August 9 | 93.9°F (1969) | 44.1°F (1976) | 0.72 in (1993) |
| August 10 | 93.9°F (1980) | 46.0°F (1956) | 0.47 in (1997) |
| August 11 | 93.0°F (1958) | 48.0°F (1981) | 0.56 in (1990) |
| August 12 | 95.0°F (2002) | 44.1°F (1985) | 0.40 in (2001) |
| August 13 | 93.9°F (1996) | 46.9°F (1959) | 1.62 in (2009) |
| August 14 | 95.0°F (1962) | 45.0°F (1968) | 0.65 in (1991) |
| August 15 | 95.0°F (2002) | 41.0°F (1968) | 1.01 in (1957) |
| August 16 | 95.0°F (2002) | 46.0°F (1980) | 1.04 in (1990) |
| August 17 | 93.9°F (2002) | 34.0°F (1960) | 0.53 in (1977) |
| August 18 | 95.0°F (2002) | 42.1°F (1968) | 0.55 in (1989) |
| August 19 | 93.0°F (2020) | 45.0°F (1979) | 1.21 in (2021) |
| August 20 | 91.0°F (1960) | 39.9°F (1980) | 0.98 in (1971) |
| August 21 | 91.9°F (2020) | 44.1°F (1964) | 0.57 in (1999) |
| August 22 | 89.1°F (2020) | 45.0°F (1964) | 1.49 in (1962) |
| August 23 | 89.1°F (1988) | 35.1°F (1968) | 0.99 in (1997) |
| August 24 | 89.1°F (1964) | 44.1°F (1962) | 0.58 in (2013) |
| August 25 | 90.0°F (1967) | 45.0°F (1960) | 0.61 in (2013) |
| August 26 | 89.1°F (1994) | 45.0°F (1987) | 1.11 in (2013) |
| August 27 | 91.9°F (2001) | 39.9°F (1954) | 0.87 in (1972) |
| August 28 | 89.1°F (1996) | 43.0°F (2014) | 0.71 in (1971) |
| August 29 | 90.0°F (1996) | 46.9°F (1964) | 0.73 in (1957) |
| August 30 | 91.0°F (1995) | 46.0°F (1957) | 0.39 in (2000) |
| August 31 | 91.9°F (1996) | 42.1°F (1962) | 0.72 in (1966) |