August weather in Mackinac Island, MI
The average temperature in Mackinac Island in August is 65.5°F (56.2°F–74.8°F). Average precipitation: 3.11 inches.
August is a summer month in Mackinac Island, and is warmer than the annual average of 42.5°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Daylight averages about 13h 57m. For travel, August is one of the best months of the year to visit.
Avg High
74.8°F
Avg Low
56.2°F
Precipitation
3.11 in
Daylight
13h 57m
August records in Mackinac Island
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 82.0°F (2011) | 45.0°F (2019) | 0.52 in (2013) |
| August 2 | 82.0°F (2011) | 51.1°F (2019) | 0.22 in (2017) |
| August 3 | 82.9°F (2016) | 53.1°F (2021) | 0.90 in (2015) |
| August 4 | 82.0°F (2016) | 53.1°F (2020) | 1.24 in (2017) |
| August 5 | 87.1°F (2016) | 50.0°F (2015) | 0.50 in (2010) |
| August 6 | 84.0°F (2012) | 50.0°F (2015) | 0.50 in (2018) |
| August 7 | 80.1°F (2018) | 48.0°F (2017) | 0.10 in (2018) |
| August 8 | 84.0°F (2011) | 51.1°F (2015) | 1.00 in (2019) |
| August 9 | 80.1°F (2012) | 52.0°F (2010) | 0.17 in (2021) |
| August 10 | 84.9°F (2016) | 55.0°F (2019) | 0.48 in (2021) |
| August 11 | 84.9°F (2016) | 55.9°F (2015) | 0.15 in (2021) |
| August 12 | 84.0°F (2021) | 50.0°F (2013) | 1.57 in (2014) |
| August 13 | 81.0°F (2010) | 46.9°F (2013) | 0.27 in (2013) |
| August 14 | 82.0°F (2010) | 46.0°F (2014) | 0.05 in (2019) |
| August 15 | 82.0°F (2018) | 45.0°F (2014) | 0.02 in (2017) |
| August 16 | 82.0°F (2010) | 50.0°F (2014) | 0.21 in (2014) |
| August 17 | 82.9°F (2015) | 54.0°F (2014) | 0.60 in (2019) |
| August 18 | 82.9°F (2018) | 53.1°F (2014) | 1.33 in (2017) |
| August 19 | 82.9°F (2016) | 50.0°F (2020) | 2.42 in (2010) |
| August 20 | 82.0°F (2021) | 51.1°F (2012) | 0.58 in (2020) |
| August 21 | 84.0°F (2021) | 53.1°F (2015) | 0.54 in (2016) |
| August 22 | 87.1°F (2021) | 50.0°F (2019) | 0.72 in (2021) |
| August 23 | 81.0°F (2021) | 48.9°F (2019) | 0.39 in (2020) |
| August 24 | 81.0°F (2011) | 46.9°F (2017) | 1.06 in (2015) |
| August 25 | 80.1°F (2021) | 46.0°F (2017) | 1.78 in (2016) |
| August 26 | 79.0°F (2021) | 46.9°F (2017) | 0.33 in (2018) |
| August 27 | 87.1°F (2012) | 48.9°F (2015) | 0.71 in (2020) |
| August 28 | 78.1°F (2010) | 46.0°F (2014) | 0.66 in (2018) |
| August 29 | 84.0°F (2010) | 46.9°F (2014) | 1.01 in (2021) |
| August 30 | 84.0°F (2010) | 48.9°F (2018) | 1.06 in (2014) |
| August 31 | 82.9°F (2010) | 48.0°F (2018) | 0.29 in (2011) |