September weather in Oostburg, WI
The average temperature in Oostburg in September is °F (°F–°F). Average precipitation: 2.85 inches.
September is a fall month in Oostburg, and is cooler than the annual average of 0°F. Daylight averages about 12h 17m.
Avg High
°F
Avg Low
°F
Precipitation
2.85 in
Daylight
12h 17m
September records in Oostburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 84.9°F (2010) | 45.0°F (2001) | 0.30 in (2010) |
| September 2 | 84.0°F (2015) | 41.0°F (2009) | 1.05 in (2020) |
| September 3 | 87.1°F (2023) | 41.0°F (2009) | 0.55 in (2018) |
| September 4 | 93.9°F (2023) | 42.1°F (2025) | 0.30 in (2018) |
| September 5 | 87.1°F (2023) | 42.1°F (2010) | 1.07 in (2008) |
| September 6 | 84.0°F (2007) | 44.1°F (2011) | 0.67 in (2010) |
| September 7 | 86.0°F (2015) | 42.1°F (2025) | 0.44 in (2007) |
| September 8 | 84.0°F (2002) | 39.9°F (2025) | 0.62 in (2001) |
| September 9 | 87.1°F (2002) | 41.0°F (2010) | 0.78 in (2015) |
| September 10 | 90.0°F (2002) | 39.9°F (2008) | 0.81 in (2001) |
| September 11 | 90.0°F (2013) | 43.0°F (2007) | 0.68 in (2010) |
| September 12 | 82.9°F (2011) | 37.9°F (2014) | 1.45 in (2006) |
| September 13 | 86.0°F (2011) | 37.9°F (2014) | 1.03 in (2019) |
| September 14 | 82.0°F (2009) | 37.9°F (2014) | 0.45 in (2008) |
| September 15 | 82.9°F (2009) | 34.0°F (2007) | 0.93 in (2003) |
| September 16 | 80.1°F (2015) | 36.0°F (2011) | 0.45 in (2013) |
| September 17 | 79.0°F (2025) | 39.0°F (2013) | 0.06 in (2011) |
| September 18 | 81.0°F (2025) | 39.0°F (2013) | 0.72 in (2015) |
| September 19 | 75.9°F (2007) | 30.9°F (2012) | 0.96 in (2002) |
| September 20 | 79.0°F (2002) | 39.0°F (2006) | 1.30 in (2001) |
| September 21 | 84.0°F (2024) | 35.1°F (2006) | 1.53 in (2021) |
| September 22 | 84.9°F (2007) | 32.0°F (2012) | 0.54 in (2024) |
| September 23 | 75.0°F (2025) | 37.0°F (2013) | 1.32 in (2019) |
| September 24 | 86.0°F (2010) | 35.1°F (2012) | 0.63 in (2001) |
| September 25 | 81.0°F (2007) | 36.0°F (2001) | 0.08 in (2024) |
| September 26 | 73.9°F (2007) | 39.0°F (2001) | 0.22 in (2018) |
| September 27 | 80.1°F (2008) | 35.1°F (2012) | 0.32 in (2011) |
| September 28 | 84.0°F (2025) | 39.0°F (2006) | 0.26 in (2009) |
| September 29 | 75.9°F (2014) | 33.1°F (2003) | 0.32 in (2013) |
| September 30 | 79.0°F (2015) | 33.1°F (2009) | 0.48 in (2014) |