September weather in Bayfield, WI
The average temperature in Bayfield in September is 58.0°F (47.5°F–68.4°F). Average precipitation: 3.41 inches.
September is a fall month in Bayfield, and is warmer than the annual average of 41.1°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
68.4°F
Avg Low
47.5°F
Precipitation
3.41 in
Daylight
12h 19m
September records in Bayfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 84.9°F (2024) | 45.0°F (2020) | 0.86 in (2018) |
| September 2 | 89.1°F (2022) | 46.0°F (2016) | 0.01 in (2020) |
| September 3 | 88.0°F (2022) | 48.9°F (2016) | 0.62 in (2019) |
| September 4 | 89.1°F (2023) | 39.0°F (2025) | 0.35 in (2019) |
| September 5 | 87.1°F (2023) | 43.0°F (2020) | 0.96 in (2018) |
| September 6 | 87.1°F (2023) | 37.9°F (2025) | 1.08 in (2023) |
| September 7 | 81.0°F (2016) | 39.9°F (2025) | 0.51 in (2023) |
| September 8 | 75.0°F (2021) | 37.9°F (2020) | 0.41 in (2016) |
| September 9 | 86.0°F (2022) | 36.0°F (2020) | 2.20 in (2025) |
| September 10 | 77.0°F (2016) | 35.1°F (2020) | 1.29 in (2022) |
| September 11 | 82.0°F (2024) | 37.9°F (2020) | 0.25 in (2018) |
| September 12 | 81.0°F (2018) | 42.1°F (2020) | 0.30 in (2020) |
| September 13 | 80.1°F (2016) | 45.0°F (2021) | 1.45 in (2019) |
| September 14 | 82.9°F (2018) | 37.0°F (2023) | 0.73 in (2021) |
| September 15 | 80.1°F (2018) | 41.0°F (2023) | 0.35 in (2023) |
| September 16 | 84.9°F (2024) | 46.0°F (2016) | 0.12 in (2022) |
| September 17 | 86.0°F (2018) | 36.0°F (2020) | 0.63 in (2021) |
| September 18 | 84.9°F (2024) | 33.1°F (2020) | 1.01 in (2022) |
| September 19 | 84.0°F (2024) | 35.1°F (2020) | 0.12 in (2016) |
| September 20 | 87.1°F (2021) | 45.0°F (2016) | 0.18 in (2025) |
| September 21 | 82.0°F (2022) | 48.0°F (2016) | 1.37 in (2021) |
| September 22 | 79.0°F (2019) | 39.0°F (2018) | 0.06 in (2025) |
| September 23 | 73.9°F (2020) | 35.1°F (2022) | 0.15 in (2023) |
| September 24 | 75.9°F (2020) | 39.9°F (2022) | 0.68 in (2023) |
| September 25 | 75.0°F (2019) | 43.0°F (2021) | 0.55 in (2018) |
| September 26 | 81.0°F (2025) | 37.9°F (2018) | 1.03 in (2020) |
| September 27 | 79.0°F (2021) | 39.0°F (2022) | 0.29 in (2016) |
| September 28 | 78.1°F (2024) | 33.1°F (2022) | 0.24 in (2016) |
| September 29 | 78.1°F (2025) | 32.0°F (2018) | 0.27 in (2018) |
| September 30 | 77.0°F (2025) | 32.0°F (2018) | 0.74 in (2019) |