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Precipitation patterns have also fluctuated, with July 31, 2010 recording the highest precipitation in the past 15 years at 15 mm, all of which came from rainfall. Interestingly, 10 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 July 31 reaching 29 mph (2015) and the highest sustained wind speed recorded at 15 mph (2015).
These historical trends suggest that the weather on July 31 in Lemont has been quite unpredictable over the years.
Historical July 31 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 | 77°F | 67°F | 15 mm | 15 mm | 0 mm | 17 mph | 9 mph |
| 2011 | 89°F | 68°F | 0 mm | 0 mm | 0 mm | 14 mph | 6 mph |
| 2012 | 85°F | 70°F | 6.2 mm | 6.2 mm | 0 mm | 22 mph | 9 mph |
| 2013 | 76°F | 65°F | 0 mm | 0 mm | 0 mm | 15 mph | 7 mph |
| 2014 | 80°F | 58°F | 0 mm | 0 mm | 0 mm | 22 mph | 10 mph |
| 2015 | 83°F | 66°F | 0 mm | 0 mm | 0 mm | 29 mph | 15 mph |
| 2016 | 79°F | 65°F | 0.9 mm | 0.9 mm | 0 mm | 17 mph | 5 mph |
| 2017 | 83°F | 62°F | 0 mm | 0 mm | 0 mm | 15 mph | 7 mph |
| 2018 | 76°F | 64°F | 4.2 mm | 4.2 mm | 0 mm | 19 mph | 7 mph |
| 2019 | 75°F | 60°F | 0 mm | 0 mm | 0 mm | 21 mph | 9 mph |
| 2020 | 79°F | 65°F | 0 mm | 0 mm | 0 mm | 22 mph | 10 mph |
| 2021 | 81°F | 60°F | 0 mm | 0 mm | 0 mm | 19 mph | 9 mph |
| 2022 | 82°F | 62°F | 0 mm | 0 mm | 0 mm | 21 mph | 10 mph |
| 2023 | 81°F | 61°F | 0 mm | 0 mm | 0 mm | 14 mph | 6 mph |
| 2024 | 88°F | 68°F | 0.4 mm | 0.4 mm | 0 mm | 22 mph | 11 mph |
