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Precipitation patterns have also fluctuated, with Oct. 30, 2019 recording the highest precipitation in the past 15 years at 22.1 mm, consisting of 11.4 mm of rainfall and 74.9 mm of snowfall. For reference, 7 mm of snowfall is generally equivalent to 1 mm of rain or total precipitation. Interestingly, six 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 Oct. 30 reaching 41 mph (2017) and the highest sustained wind speed recorded at 20 mph (2017).
These historical trends suggest that the weather on Oct. 30 in Lemont has been quite unpredictable over the years.
Historical Oct. 30 Weather in Lemont (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 | 42°F | 0 mm | 0 mm | 0 mm | 32 mph | 15 mph |
| 2011 | 55°F | 35°F | 4 mm | 4 mm | 0 mm | 34 mph | 19 mph |
| 2012 | 45°F | 39°F | 0 mm | 0 mm | 0 mm | 38 mph | 19 mph |
| 2013 | 64°F | 45°F | 10.6 mm | 10.6 mm | 0 mm | 32 mph | 17 mph |
| 2014 | 50°F | 36°F | 0.5 mm | 0.5 mm | 0 mm | 17 mph | 7 mph |
| 2015 | 55°F | 41°F | 0 mm | 0 mm | 0 mm | 17 mph | 9 mph |
| 2016 | 56°F | 49°F | 3 mm | 3 mm | 0 mm | 25 mph | 11 mph |
| 2017 | 46°F | 37°F | 0.2 mm | 0.2 mm | 0 mm | 41 mph | 20 mph |
| 2018 | 67°F | 42°F | 8.2 mm | 8.2 mm | 0 mm | 33 mph | 12 mph |
| 2019 | 40°F | 34°F | 22.1 mm | 11.4 mm | 74.9 mm | 29 mph | 14 mph |
| 2020 | 42°F | 28°F | 0 mm | 0 mm | 0 mm | 17 mph | 8 mph |
| 2021 | 60°F | 44°F | 0.5 mm | 0.5 mm | 0 mm | 26 mph | 14 mph |
| 2022 | 63°F | 42°F | 5.4 mm | 5.4 mm | 0 mm | 15 mph | 8 mph |
| 2023 | 39°F | 28°F | 0 mm | 0 mm | 0 mm | 23 mph | 11 mph |
| 2024 | 76°F | 67°F | 0 mm | 0 mm | 0 mm | 34 mph | 18 mph |
