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Precipitation patterns have also fluctuated, with June 21, 2018 recording the highest precipitation in the past 15 years at 65.5 mm, all of which came from rainfall. Interestingly, four 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 June 21 reaching 34 mph (2012) and the highest sustained wind speed recorded at 18 mph (2021).
These historical trends suggest that the weather on June 21 in Bourbonnais has been quite unpredictable over the years.
Historical June 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 | 86°F | 68°F | 32.4 mm | 32.4 mm | 0 mm | 23 mph | 10 mph |
| 2011 | 86°F | 70°F | 13.1 mm | 13.1 mm | 0 mm | 29 mph | 15 mph |
| 2012 | 82°F | 70°F | 4.2 mm | 4.2 mm | 0 mm | 34 mph | 13 mph |
| 2013 | 84°F | 66°F | 3.2 mm | 3.2 mm | 0 mm | 28 mph | 14 mph |
| 2014 | 84°F | 63°F | 10.9 mm | 10.9 mm | 0 mm | 22 mph | 9 mph |
| 2015 | 83°F | 68°F | 11.1 mm | 11.1 mm | 0 mm | 23 mph | 9 mph |
| 2016 | 83°F | 65°F | 0 mm | 0 mm | 0 mm | 23 mph | 12 mph |
| 2017 | 82°F | 59°F | 3.5 mm | 3.5 mm | 0 mm | 15 mph | 8 mph |
| 2018 | 72°F | 65°F | 65.5 mm | 65.5 mm | 0 mm | 23 mph | 11 mph |
| 2019 | 75°F | 50°F | 1.8 mm | 1.8 mm | 0 mm | 21 mph | 11 mph |
| 2020 | 79°F | 69°F | 6.7 mm | 6.7 mm | 0 mm | 16 mph | 9 mph |
| 2021 | 74°F | 58°F | 1.5 mm | 1.5 mm | 0 mm | 34 mph | 18 mph |
| 2022 | 97°F | 72°F | 0 mm | 0 mm | 0 mm | 29 mph | 16 mph |
| 2023 | 92°F | 66°F | 0 mm | 0 mm | 0 mm | 29 mph | 15 mph |
| 2024 | 91°F | 67°F | 0 mm | 0 mm | 0 mm | 24 mph | 13 mph |
