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Precipitation patterns have also fluctuated, with May 31, 2011 recording the highest precipitation in the past 15 years at 19 mm, all of which came from rainfall. 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 May 31 reaching 43 mph (2011) and the highest sustained wind speed recorded at 17 mph (2013).
These historical trends suggest that the weather on May 31 in Lemont has been quite unpredictable over the years.
Historical May 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 | 81°F | 66°F | 9.5 mm | 9.5 mm | 0 mm | 24 mph | 7 mph |
| 2011 | 84°F | 68°F | 19 mm | 19 mm | 0 mm | 43 mph | 16 mph |
| 2012 | 55°F | 50°F | 14.5 mm | 14.5 mm | 0 mm | 27 mph | 13 mph |
| 2013 | 77°F | 67°F | 11 mm | 11 mm | 0 mm | 32 mph | 17 mph |
| 2014 | 85°F | 57°F | 0 mm | 0 mm | 0 mm | 17 mph | 8 mph |
| 2015 | 56°F | 46°F | 0.1 mm | 0.1 mm | 0 mm | 35 mph | 16 mph |
| 2016 | 82°F | 63°F | 6.6 mm | 6.6 mm | 0 mm | 21 mph | 8 mph |
| 2017 | 67°F | 50°F | 0 mm | 0 mm | 0 mm | 29 mph | 14 mph |
| 2018 | 85°F | 67°F | 0.9 mm | 0.9 mm | 0 mm | 33 mph | 14 mph |
| 2019 | 80°F | 57°F | 0 mm | 0 mm | 0 mm | 21 mph | 10 mph |
| 2020 | 67°F | 46°F | 0 mm | 0 mm | 0 mm | 19 mph | 9 mph |
| 2021 | 69°F | 51°F | 1.1 mm | 1.1 mm | 0 mm | 21 mph | 10 mph |
| 2022 | 82°F | 68°F | 0.4 mm | 0.4 mm | 0 mm | 32 mph | 16 mph |
| 2023 | 88°F | 64°F | 2.2 mm | 2.2 mm | 0 mm | 31 mph | 8 mph |
| 2024 | 75°F | 49°F | 0 mm | 0 mm | 0 mm | 18 mph | 9 mph |
