August weather in Grantsville, UT
The average temperature in Grantsville in August is 76.0°F (61.7°F–90.3°F). Average precipitation: 0.73 inches.
August is a summer month in Grantsville, and is warmer than the annual average of 51.2°F. Daily temperatures swing about 28.6°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 13h 37m. For travel, August is hot.
Avg High
90.3°F
Avg Low
61.7°F
Precipitation
0.73 in
Daylight
13h 37m
August records in Grantsville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (2000) | 55.0°F (2001) | 1.60 in (2023) |
| August 2 | 100.9°F (2008) | 55.0°F (2016) | 0.73 in (2021) |
| August 3 | 100.9°F (2020) | 48.0°F (2015) | 1.40 in (2023) |
| August 4 | 100.0°F (2020) | 55.0°F (2015) | 0.53 in (1916) |
| August 5 | 98.1°F (2019) | 51.1°F (2015) | 0.44 in (2000) |
| August 6 | 102.0°F (2021) | 54.0°F (2015) | 0.37 in (2014) |
| August 7 | 100.9°F (2019) | 51.1°F (2009) | 0.91 in (1971) |
| August 8 | 100.0°F (2003) | 52.0°F (2002) | 0.29 in (1988) |
| August 9 | 100.0°F (2003) | 50.0°F (2009) | 0.23 in (1983) |
| August 10 | 100.0°F (2003) | 51.1°F (2009) | 0.57 in (1993) |
| August 11 | 100.0°F (2003) | 54.0°F (2009) | 0.66 in (2022) |
| August 12 | 102.0°F (2003) | 50.0°F (2015) | 0.72 in (1930) |
| August 13 | 96.1°F (2007) | 50.0°F (2015) | 0.52 in (1978) |
| August 14 | 102.9°F (2007) | 52.0°F (2015) | 0.95 in (1978) |
| August 15 | 99.0°F (2007) | 45.0°F (2011) | 0.38 in (1921) |
| August 16 | 98.1°F (2003) | 46.0°F (2011) | 0.34 in (1973) |
| August 17 | 97.0°F (2000) | 44.1°F (2015) | 1.00 in (1908) |
| August 18 | 99.0°F (2020) | 45.0°F (2015) | 0.55 in (1983) |
| August 19 | 100.0°F (2001) | 48.9°F (2015) | 0.42 in (1983) |
| August 20 | 99.0°F (2020) | 48.9°F (2021) | 2.15 in (1906) |
| August 21 | 100.0°F (2025) | 48.9°F (2021) | 0.52 in (1965) |
| August 22 | 98.1°F (2006) | 52.0°F (2002) | 0.98 in (1995) |
| August 23 | 99.0°F (2006) | 50.0°F (2015) | 1.03 in (2018) |
| August 24 | 99.0°F (2006) | 50.0°F (2014) | 0.76 in (2023) |
| August 25 | 98.1°F (2020) | 52.0°F (2014) | 0.26 in (1921) |
| August 26 | 98.1°F (2011) | 48.0°F (2024) | 0.71 in (1982) |
| August 27 | 95.0°F (2007) | 48.0°F (2004) | 0.96 in (1932) |
| August 28 | 97.0°F (2001) | 46.0°F (2004) | 0.67 in (1982) |
| August 29 | 96.1°F (2012) | 46.9°F (2004) | 0.50 in (1932) |
| August 30 | 100.0°F (2005) | 46.0°F (2024) | 0.68 in (1907) |
| August 31 | 98.1°F (2008) | 46.0°F (2005) | 1.36 in (2000) |