August weather in Lewiston, UT
The average temperature in Lewiston in August is 68.1°F (48.6°F–87.6°F). Average precipitation: 0.83 inches.
August is a summer month in Lewiston, and is warmer than the annual average of 45.9°F. Daily temperatures swing about 39°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 13h 42m. For travel, August is a comfortable month to visit.
Avg High
87.6°F
Avg Low
48.6°F
Precipitation
0.83 in
Daylight
13h 42m
August records in Lewiston
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (2000) | 39.0°F (1995) | 1.35 in (2011) |
| August 2 | 102.0°F (2000) | 30.9°F (2012) | 0.68 in (2011) |
| August 3 | 99.0°F (2000) | 27.0°F (2012) | 0.94 in (1988) |
| August 4 | 100.0°F (1946) | 37.0°F (1980) | 1.21 in (2023) |
| August 5 | 102.0°F (1994) | 37.0°F (2012) | 0.65 in (2023) |
| August 6 | 99.0°F (1994) | 36.0°F (2012) | 1.14 in (2014) |
| August 7 | 98.1°F (2001) | 30.0°F (2012) | 0.59 in (2022) |
| August 8 | 97.0°F (1994) | 39.0°F (1996) | 0.72 in (2015) |
| August 9 | 97.0°F (2001) | 37.0°F (1995) | 0.23 in (1983) |
| August 10 | 95.0°F (1946) | 34.0°F (1985) | 0.68 in (1947) |
| August 11 | 99.0°F (1992) | 33.1°F (2012) | 0.56 in (1997) |
| August 12 | 99.0°F (1992) | 30.0°F (2012) | 1.17 in (1945) |
| August 13 | 99.0°F (1996) | 36.0°F (2012) | 0.55 in (1979) |
| August 14 | 98.1°F (2025) | 35.1°F (1944) | 0.90 in (2024) |
| August 15 | 99.0°F (1994) | 35.1°F (1989) | 0.45 in (1980) |
| August 16 | 97.0°F (1992) | 30.9°F (2012) | 0.66 in (1998) |
| August 17 | 95.0°F (1948) | 30.9°F (2012) | 0.19 in (1983) |
| August 18 | 97.0°F (1986) | 28.0°F (2019) | 2.40 in (1977) |
| August 19 | 98.1°F (2020) | 27.0°F (2012) | 0.95 in (2021) |
| August 20 | 97.0°F (1992) | 33.1°F (1978) | 0.58 in (1945) |
| August 21 | 96.1°F (1994) | 36.0°F (1978) | 0.42 in (2014) |
| August 22 | 95.0°F (1992) | 36.0°F (1988) | 0.45 in (2021) |
| August 23 | 96.1°F (2009) | 37.0°F (1988) | 0.50 in (2014) |
| August 24 | 96.1°F (1988) | 30.9°F (1992) | 0.26 in (1987) |
| August 25 | 97.0°F (1988) | 30.9°F (1992) | 0.16 in (1984) |
| August 26 | 96.1°F (2015) | 28.0°F (1992) | 1.19 in (1977) |
| August 27 | 95.0°F (1948) | 26.1°F (2019) | 0.33 in (2025) |
| August 28 | 99.0°F (1948) | 28.9°F (2019) | 0.38 in (2025) |
| August 29 | 102.0°F (1948) | 27.0°F (2012) | 0.10 in (2010) |
| August 30 | 97.0°F (1948) | 30.9°F (1993) | 0.50 in (2000) |
| August 31 | 98.1°F (1948) | 32.0°F (1993) | 1.35 in (2000) |