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Precipitation patterns have also fluctuated, with Nov. 21, 2015 recording the highest precipitation in the past 15 years at 15.7 mm, all of which came from snowfall. For reference, 7 mm of snowfall is generally equivalent to 1 mm of rain or total precipitation. Interestingly, five 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 Nov. 21 reaching 46 mph (2019) and the highest sustained wind speed recorded at 22 mph (2019).
These historical trends suggest that the weather on Nov. 21 in Bourbonnais has been quite unpredictable over the years.
Historical Nov. 21 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 | 60°F | 40°F | 0.4 mm | 0.4 mm | 0 mm | 32 mph | 18 mph |
| 2011 | 50°F | 38°F | 2.3 mm | 2.3 mm | 0 mm | 18 mph | 10 mph |
| 2012 | 57°F | 38°F | 0 mm | 0 mm | 0 mm | 16 mph | 10 mph |
| 2013 | 49°F | 42°F | 6.7 mm | 6.7 mm | 0 mm | 15 mph | 8 mph |
| 2014 | 33°F | 15°F | 0 mm | 0 mm | 0 mm | 23 mph | 13 mph |
| 2015 | 37°F | 19°F | 15.7 mm | 0 mm | 110.6 mm | 34 mph | 19 mph |
| 2016 | 40°F | 23°F | 0 mm | 0 mm | 0 mm | 9 mph | 5 mph |
| 2017 | 48°F | 28°F | 0.8 mm | 0.8 mm | 0 mm | 34 mph | 19 mph |
| 2018 | 39°F | 28°F | 0 mm | 0 mm | 0 mm | 19 mph | 11 mph |
| 2019 | 57°F | 41°F | 11.1 mm | 11.1 mm | 0 mm | 46 mph | 22 mph |
| 2020 | 48°F | 41°F | 0.3 mm | 0.3 mm | 0 mm | 17 mph | 10 mph |
| 2021 | 54°F | 31°F | 1.7 mm | 1.7 mm | 0 mm | 34 mph | 20 mph |
| 2022 | 47°F | 27°F | 0 mm | 0 mm | 0 mm | 28 mph | 16 mph |
| 2023 | 44°F | 35°F | 12.3 mm | 12.3 mm | 0 mm | 27 mph | 15 mph |
| 2024 | 39°F | 30°F | 6.6 mm | 0.9 mm | 39.9 mm | 41 mph | 20 mph |
