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Precipitation patterns have also fluctuated, with Sept. 15, 2013 recording the highest precipitation in the past 15 years at 12 mm, all of which came from rainfall. Interestingly, 11 years out of the last 15 years had no measurable precipitation on this date.
Wind speeds have varied as well, with the strongest gust on Sept. 15 reaching 36 mph (2019) and the highest sustained wind speed recorded at 13 mph (2019).
These historical trends suggest that the weather on Sept. 15 in Bourbonnais has been quite unpredictable over the years.
Historical Sept. 15 Weather in Bourbonnais (Last 15 Years)
| Year | High Temp (°F) | Low Temp (°F) | Precipitation (mm) | Rain (mm) | Snowfall (mm) | Strongest Wind Gust (mph) | Max Wind Speed (mph) |
|---|---|---|---|---|---|---|---|
| 2010 | 80°F | 59°F | 0.8 mm | 0.8 mm | 0 mm | 23 mph | 10 mph |
| 2011 | 62°F | 46°F | 0 mm | 0 mm | 0 mm | 27 mph | 13 mph |
| 2012 | 76°F | 51°F | 0 mm | 0 mm | 0 mm | 13 mph | 6 mph |
| 2013 | 72°F | 56°F | 12 mm | 12 mm | 0 mm | 20 mph | 10 mph |
| 2014 | 61°F | 48°F | 6.2 mm | 6.2 mm | 0 mm | 17 mph | 8 mph |
| 2015 | 79°F | 62°F | 0 mm | 0 mm | 0 mm | 24 mph | 13 mph |
| 2016 | 77°F | 60°F | 0 mm | 0 mm | 0 mm | 19 mph | 10 mph |
| 2017 | 86°F | 62°F | 0 mm | 0 mm | 0 mm | 20 mph | 10 mph |
| 2018 | 82°F | 62°F | 0 mm | 0 mm | 0 mm | 21 mph | 10 mph |
| 2019 | 81°F | 64°F | 10.9 mm | 10.9 mm | 0 mm | 36 mph | 13 mph |
| 2020 | 77°F | 56°F | 0 mm | 0 mm | 0 mm | 18 mph | 8 mph |
| 2021 | 77°F | 60°F | 0 mm | 0 mm | 0 mm | 16 mph | 9 mph |
| 2022 | 82°F | 57°F | 0 mm | 0 mm | 0 mm | 17 mph | 8 mph |
| 2023 | 75°F | 50°F | 0 mm | 0 mm | 0 mm | 12 mph | 6 mph |
| 2024 | 87°F | 66°F | 0 mm | 0 mm | 0 mm | 18 mph | 9 mph |
