August weather in Portage, MI
The average temperature in Portage in August is 70.8°F (60.4°F–81.1°F). Average precipitation: 3.66 inches.
August is a summer month in Portage, and is warmer than the annual average of 49.5°F. Daily temperatures swing about 20.7°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 43m. For travel, August is a comfortable month to visit.
Avg High
81.1°F
Avg Low
60.4°F
Precipitation
3.66 in
Daylight
13h 43m
August records in Portage
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 95.0°F (2006) | 54.0°F (1998) | 0.61 in (2003) |
| August 2 | 95.0°F (2006) | 52.0°F (2021) | 1.03 in (2002) |
| August 3 | 95.0°F (2012) | 52.0°F (1999) | 0.83 in (2006) |
| August 4 | 91.9°F (2012) | 51.1°F (2000) | 0.57 in (2002) |
| August 5 | 93.0°F (2018) | 48.9°F (2013) | 0.69 in (2007) |
| August 6 | 91.0°F (2022) | 50.0°F (2004) | 1.00 in (2024) |
| August 7 | 91.0°F (2001) | 51.1°F (2002) | 2.15 in (2013) |
| August 8 | 93.0°F (2001) | 52.0°F (2017) | 1.39 in (2009) |
| August 9 | 93.9°F (2009) | 50.0°F (1999) | 1.13 in (2012) |
| August 10 | 91.9°F (2025) | 48.9°F (2008) | 0.59 in (2012) |
| August 11 | 91.9°F (2016) | 53.1°F (2008) | 0.98 in (2010) |
| August 12 | 91.0°F (2016) | 51.1°F (2006) | 1.47 in (2013) |
| August 13 | 88.0°F (2002) | 51.1°F (2006) | 0.71 in (2011) |
| August 14 | 91.0°F (2020) | 46.9°F (2013) | 1.01 in (2015) |
| August 15 | 89.1°F (2000) | 43.0°F (2014) | 3.12 in (2016) |
| August 16 | 93.0°F (2009) | 50.0°F (2006) | 0.97 in (2001) |
| August 17 | 86.0°F (2005) | 52.0°F (2013) | 1.23 in (2018) |
| August 18 | 88.0°F (2021) | 46.0°F (2012) | 0.92 in (2007) |
| August 19 | 88.0°F (2021) | 48.0°F (1998) | 1.64 in (2007) |
| August 20 | 91.0°F (2023) | 46.0°F (2000) | 1.37 in (2005) |
| August 21 | 95.0°F (2003) | 46.9°F (2000) | 0.39 in (2003) |
| August 22 | 90.0°F (2021) | 48.0°F (2004) | 3.18 in (2001) |
| August 23 | 93.0°F (2023) | 51.1°F (2019) | 1.09 in (2007) |
| August 24 | 93.9°F (2021) | 48.9°F (2019) | 1.85 in (2021) |
| August 25 | 91.9°F (2014) | 45.0°F (2017) | 1.40 in (1999) |
| August 26 | 93.0°F (2020) | 46.0°F (2008) | 0.86 in (2000) |
| August 27 | 96.1°F (2024) | 43.0°F (2025) | 0.63 in (2016) |
| August 28 | 91.0°F (2021) | 51.1°F (2023) | 1.69 in (2006) |
| August 29 | 93.0°F (2010) | 44.1°F (2025) | 0.56 in (2006) |
| August 30 | 91.0°F (2010) | 43.0°F (2025) | 0.20 in (2014) |
| August 31 | 93.0°F (2012) | 45.0°F (2009) | 0.12 in (2003) |