August weather in Norwalk, WI
The average temperature in Norwalk in August is 67.8°F (56.9°F–78.6°F). Average precipitation: 4.41 inches.
August is a summer month in Norwalk, and is warmer than the annual average of 45°F. Daily temperatures swing about 21.7°F between overnight low and afternoon high. Daylight averages about 13h 49m. For travel, August is a comfortable month to visit.
Avg High
78.6°F
Avg Low
56.9°F
Precipitation
4.41 in
Daylight
13h 49m
August records in Norwalk
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 90.0°F (2024) | 48.0°F (2025) | 0.31 in (2024) |
| August 2 | 84.0°F (2023) | 48.9°F (2021) | 0.35 in (2018) |
| August 3 | 88.0°F (2015) | 48.0°F (2020) | 0.00 in (2014) |
| August 4 | 89.1°F (2023) | 43.0°F (2020) | 0.41 in (2017) |
| August 5 | 87.1°F (2024) | 48.9°F (2020) | 1.47 in (2016) |
| August 6 | 84.0°F (2019) | 48.9°F (2020) | 0.68 in (2024) |
| August 7 | 86.0°F (2022) | 48.9°F (2024) | 0.55 in (2022) |
| August 8 | 86.0°F (2025) | 51.1°F (2017) | 4.02 in (2021) |
| August 9 | 87.1°F (2025) | 46.9°F (2024) | 1.43 in (2021) |
| August 10 | 87.1°F (2018) | 46.0°F (2024) | 0.95 in (2025) |
| August 11 | 88.0°F (2016) | 48.0°F (2024) | 1.31 in (2019) |
| August 12 | 87.1°F (2018) | 45.0°F (2017) | 0.58 in (2016) |
| August 13 | 88.0°F (2018) | 50.0°F (2017) | 0.61 in (2022) |
| August 14 | 87.1°F (2018) | 44.1°F (2014) | 0.23 in (2019) |
| August 15 | 89.1°F (2015) | 48.0°F (2014) | 0.30 in (2020) |
| August 16 | 89.1°F (2015) | 51.1°F (2023) | 0.28 in (2024) |
| August 17 | 88.0°F (2015) | 51.1°F (2022) | 1.85 in (2018) |
| August 18 | 82.9°F (2016) | 46.9°F (2020) | 2.31 in (2025) |
| August 19 | 84.9°F (2016) | 48.9°F (2020) | 0.66 in (2014) |
| August 20 | 88.0°F (2023) | 52.0°F (2024) | 0.44 in (2016) |
| August 21 | 90.0°F (2023) | 46.9°F (2024) | 0.55 in (2021) |
| August 22 | 82.0°F (2020) | 46.0°F (2024) | 0.28 in (2014) |
| August 23 | 89.1°F (2023) | 48.0°F (2017) | 0.20 in (2015) |
| August 24 | 100.9°F (2023) | 46.0°F (2019) | 1.48 in (2016) |
| August 25 | 96.1°F (2023) | 45.0°F (2025) | 2.25 in (2022) |
| August 26 | 90.0°F (2024) | 45.0°F (2025) | 0.08 in (2017) |
| August 27 | 93.0°F (2024) | 46.9°F (2015) | 0.82 in (2021) |
| August 28 | 91.0°F (2020) | 48.9°F (2015) | 10.52 in (2018) |
| August 29 | 82.9°F (2020) | 48.0°F (2019) | 2.14 in (2018) |
| August 30 | 84.0°F (2014) | 44.1°F (2019) | 1.73 in (2024) |
| August 31 | 82.0°F (2016) | 42.1°F (2023) | 0.18 in (2017) |