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Precipitation patterns have also fluctuated, with July 30, 2016 recording the highest precipitation in the past 15 years at 5.7 mm, all of which came from rainfall. 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 July 30 reaching 28 mph (2020) and the highest sustained wind speed recorded at 13 mph (2020).
These historical trends suggest that the weather on July 30 in Romeoville has been quite unpredictable over the years.
Historical July 30 Weather in Romeoville (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 | 79°F | 68°F | 0.7 mm | 0.7 mm | 0 mm | 13 mph | 9 mph |
| 2011 | 89°F | 68°F | 0 mm | 0 mm | 0 mm | 11 mph | 5 mph |
| 2012 | 91°F | 72°F | 0 mm | 0 mm | 0 mm | 14 mph | 6 mph |
| 2013 | 71°F | 59°F | 2.5 mm | 2.5 mm | 0 mm | 21 mph | 8 mph |
| 2014 | 77°F | 60°F | 0.5 mm | 0.5 mm | 0 mm | 20 mph | 5 mph |
| 2015 | 84°F | 65°F | 0 mm | 0 mm | 0 mm | 23 mph | 12 mph |
| 2016 | 75°F | 66°F | 5.7 mm | 5.7 mm | 0 mm | 20 mph | 9 mph |
| 2017 | 82°F | 60°F | 0 mm | 0 mm | 0 mm | 16 mph | 6 mph |
| 2018 | 78°F | 59°F | 0.2 mm | 0.2 mm | 0 mm | 18 mph | 8 mph |
| 2019 | 80°F | 66°F | 0.2 mm | 0.2 mm | 0 mm | 22 mph | 9 mph |
| 2020 | 79°F | 67°F | 2.7 mm | 2.7 mm | 0 mm | 28 mph | 13 mph |
| 2021 | 74°F | 63°F | 0.6 mm | 0.6 mm | 0 mm | 21 mph | 11 mph |
| 2022 | 82°F | 60°F | 0 mm | 0 mm | 0 mm | 13 mph | 5 mph |
| 2023 | 80°F | 63°F | 0.2 mm | 0.2 mm | 0 mm | 22 mph | 10 mph |
| 2024 | 89°F | 67°F | 0 mm | 0 mm | 0 mm | 17 mph | 7 mph |
