August weather in Shelby, MT
The average temperature in Shelby in August is 65.8°F (49.3°F–82.2°F). Average precipitation: 0.85 inches.
August is a summer month in Shelby, and is warmer than the annual average of 42.2°F. Daily temperatures swing about 32.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 14h 9m. For travel, August is a comfortable month to visit.
Avg High
82.2°F
Avg Low
49.3°F
Precipitation
0.85 in
Daylight
14h 9m
August records in Shelby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 96.1°F (2022) | 39.9°F (1953) | 0.40 in (1998) |
| August 2 | 98.1°F (2022) | 41.0°F (1957) | 0.46 in (2013) |
| August 3 | 100.0°F (2001) | 39.9°F (2002) | 0.99 in (2013) |
| August 4 | 99.0°F (2001) | 39.9°F (2008) | 0.73 in (1953) |
| August 5 | 97.0°F (1998) | 39.9°F (1956) | 0.66 in (1950) |
| August 6 | 97.0°F (1998) | 42.1°F (2006) | 0.58 in (1950) |
| August 7 | 96.1°F (2001) | 42.1°F (2015) | 0.46 in (2024) |
| August 8 | 97.0°F (2006) | 44.1°F (2004) | 0.30 in (1953) |
| August 9 | 98.1°F (2000) | 39.9°F (1955) | 2.46 in (2021) |
| August 10 | 100.0°F (2003) | 37.9°F (1951) | 1.09 in (1956) |
| August 11 | 102.9°F (2018) | 35.1°F (1952) | 0.32 in (1999) |
| August 12 | 100.0°F (2000) | 39.9°F (1952) | 0.46 in (1999) |
| August 13 | 95.0°F (2014) | 37.0°F (2005) | 0.56 in (1995) |
| August 14 | 98.1°F (2015) | 41.0°F (1995) | 0.74 in (1951) |
| August 15 | 95.0°F (2021) | 39.9°F (2009) | 0.35 in (2010) |
| August 16 | 99.0°F (2023) | 36.0°F (2012) | 0.38 in (1954) |
| August 17 | 95.0°F (2016) | 36.0°F (2002) | 0.42 in (2024) |
| August 18 | 97.0°F (2020) | 37.9°F (1995) | 0.42 in (2015) |
| August 19 | 93.0°F (2008) | 30.0°F (1950) | 0.32 in (2016) |
| August 20 | 93.9°F (2025) | 34.0°F (1956) | 0.29 in (1954) |
| August 21 | 93.9°F (2025) | 35.1°F (2018) | 0.47 in (1953) |
| August 22 | 93.9°F (1952) | 39.0°F (2015) | 0.51 in (2023) |
| August 23 | 96.1°F (1997) | 33.1°F (2015) | 0.70 in (2004) |
| August 24 | 96.1°F (1952) | 37.9°F (1955) | 0.60 in (2022) |
| August 25 | 93.9°F (2001) | 33.1°F (1957) | 0.19 in (1954) |
| August 26 | 93.9°F (2001) | 36.0°F (1952) | 0.23 in (2008) |
| August 27 | 97.0°F (2010) | 37.9°F (2004) | 0.54 in (1956) |
| August 28 | 93.9°F (2017) | 30.9°F (2018) | 0.30 in (2018) |
| August 29 | 93.9°F (1998) | 35.1°F (2003) | 0.40 in (1951) |
| August 30 | 97.0°F (1999) | 35.1°F (1952) | 0.85 in (1957) |
| August 31 | 96.1°F (2017) | 34.0°F (1956) | 0.53 in (2008) |