August weather in Winona, MO
The average temperature in Winona in August is 74.4°F (61.5°F–87.2°F). Average precipitation: 3.81 inches.
August is a summer month in Winona, and is warmer than the annual average of 54°F. Daily temperatures swing about 25.7°F between overnight low and afternoon high. Daylight averages about 13h 25m. For travel, August is a comfortable month to visit.
Avg High
87.2°F
Avg Low
61.5°F
Precipitation
3.81 in
Daylight
13h 25m
August records in Winona
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (2012) | 53.1°F (2018) | 0.75 in (2021) |
| August 2 | 100.0°F (2011) | 54.0°F (2018) | 0.25 in (2012) |
| August 3 | 100.9°F (2011) | 51.1°F (2025) | 0.61 in (2020) |
| August 4 | 104.0°F (2011) | 53.1°F (2025) | 0.79 in (2022) |
| August 5 | 97.0°F (2012) | 48.0°F (2017) | 1.93 in (2015) |
| August 6 | 96.1°F (2018) | 51.1°F (2017) | 1.59 in (2013) |
| August 7 | 98.1°F (2018) | 53.1°F (2020) | 1.02 in (2011) |
| August 8 | 97.0°F (2012) | 57.0°F (2024) | 1.17 in (2013) |
| August 9 | 97.0°F (2012) | 55.9°F (2017) | 0.37 in (2021) |
| August 10 | 93.9°F (2012) | 52.0°F (2024) | 1.36 in (2023) |
| August 11 | 95.0°F (2020) | 53.1°F (2012) | 0.48 in (2018) |
| August 12 | 96.1°F (2021) | 54.0°F (2012) | 0.61 in (2017) |
| August 13 | 96.1°F (2021) | 50.0°F (2014) | 0.95 in (2011) |
| August 14 | 93.9°F (2025) | 52.0°F (2014) | 0.65 in (2024) |
| August 15 | 97.0°F (2025) | 48.0°F (2013) | 3.70 in (2016) |
| August 16 | 99.0°F (2025) | 51.1°F (2013) | 0.76 in (2024) |
| August 17 | 100.0°F (2025) | 52.0°F (2023) | 1.99 in (2018) |
| August 18 | 102.0°F (2025) | 51.1°F (2012) | 0.12 in (2018) |
| August 19 | 100.9°F (2025) | 52.0°F (2012) | 0.61 in (2015) |
| August 20 | 100.0°F (2025) | 48.0°F (2015) | 0.38 in (2025) |
| August 21 | 100.9°F (2023) | 50.0°F (2020) | 0.89 in (2021) |
| August 22 | 99.0°F (2023) | 48.0°F (2024) | 0.05 in (2018) |
| August 23 | 99.0°F (2014) | 50.0°F (2024) | 1.29 in (2019) |
| August 24 | 100.0°F (2014) | 48.9°F (2017) | 0.95 in (2011) |
| August 25 | 100.0°F (2014) | 48.0°F (2015) | 0.22 in (2011) |
| August 26 | 100.0°F (2023) | 48.0°F (2025) | 0.04 in (2012) |
| August 27 | 96.1°F (2014) | 45.0°F (2025) | 0.69 in (2019) |
| August 28 | 95.0°F (2014) | 45.0°F (2025) | 1.76 in (2020) |
| August 29 | 95.0°F (2024) | 45.0°F (2025) | 0.23 in (2022) |
| August 30 | 95.0°F (2024) | 46.0°F (2025) | 0.75 in (2020) |
| August 31 | 93.9°F (2012) | 46.9°F (2023) | 1.03 in (2012) |