August weather in Manhattan, MT
The average temperature in Manhattan in August is 64.7°F (46.3°F–83.1°F). Average precipitation: 1.20 inches.
August is a summer month in Manhattan, and is warmer than the annual average of 42.7°F. Daily temperatures swing about 36.8°F between overnight low and afternoon high. Daylight averages about 13h 57m. For travel, August is a comfortable month to visit.
Avg High
83.1°F
Avg Low
46.3°F
Precipitation
1.20 in
Daylight
13h 57m
August records in Manhattan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 96.1°F (2021) | 39.9°F (2012) | 0.10 in (2011) |
| August 2 | 98.1°F (2022) | 44.1°F (2009) | 0.95 in (2013) |
| August 3 | 99.0°F (2024) | 44.1°F (2009) | 0.25 in (2021) |
| August 4 | 99.0°F (2024) | 42.1°F (2016) | 0.20 in (2011) |
| August 5 | 98.1°F (2022) | 37.9°F (2012) | 0.16 in (2015) |
| August 6 | 95.0°F (2012) | 37.9°F (2012) | 0.35 in (2022) |
| August 7 | 93.0°F (2008) | 37.9°F (2012) | 1.40 in (2009) |
| August 8 | 95.0°F (2008) | 41.0°F (2012) | 0.20 in (2025) |
| August 9 | 95.0°F (2012) | 41.0°F (2020) | 0.40 in (2021) |
| August 10 | 93.9°F (2018) | 39.9°F (2025) | 0.20 in (2023) |
| August 11 | 98.1°F (2018) | 39.9°F (2016) | 0.09 in (2022) |
| August 12 | 97.0°F (2018) | 39.9°F (2016) | 0.75 in (2019) |
| August 13 | 98.1°F (2018) | 39.9°F (2011) | 0.26 in (2022) |
| August 14 | 96.1°F (2025) | 39.9°F (2011) | 0.35 in (2010) |
| August 15 | 97.0°F (2015) | 39.9°F (2011) | 0.18 in (2009) |
| August 16 | 98.1°F (2023) | 39.0°F (2020) | 0.30 in (2014) |
| August 17 | 99.0°F (2013) | 39.0°F (2009) | 0.20 in (2009) |
| August 18 | 99.0°F (2020) | 36.0°F (2009) | 0.05 in (2021) |
| August 19 | 97.0°F (2023) | 39.0°F (2015) | 0.57 in (2016) |
| August 20 | 98.1°F (2025) | 37.9°F (2015) | 0.53 in (2021) |
| August 21 | 95.0°F (2025) | 37.9°F (2016) | 0.82 in (2023) |
| August 22 | 91.9°F (2009) | 37.9°F (2016) | 0.54 in (2014) |
| August 23 | 98.1°F (2011) | 37.0°F (2008) | 0.69 in (2014) |
| August 24 | 91.9°F (2011) | 30.9°F (2015) | 0.25 in (2009) |
| August 25 | 95.0°F (2011) | 34.0°F (2012) | 1.15 in (2014) |
| August 26 | 97.0°F (2008) | 33.1°F (2012) | 0.12 in (2023) |
| August 27 | 93.9°F (2011) | 33.1°F (2012) | 0.48 in (2018) |
| August 28 | 98.1°F (2011) | 39.9°F (2008) | 0.40 in (2018) |
| August 29 | 98.1°F (2012) | 39.0°F (2018) | 0.12 in (2025) |
| August 30 | 93.0°F (2015) | 37.9°F (2018) | 1.55 in (2010) |
| August 31 | 93.0°F (2016) | 39.9°F (2008) | 0.12 in (2015) |