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Precipitation patterns have also fluctuated, with July 20, 2010 recording the highest precipitation in the past 15 years at 20 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 July 20 reaching 38 mph (2018) and the highest sustained wind speed recorded at 14 mph (2018).
These historical trends suggest that the weather on July 20 in Petersburg has been quite unpredictable over the years.
Historical July 20 Weather in Petersburg (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 | 89°F | 73°F | 20 mm | 20 mm | 0 mm | 32 mph | 10 mph |
| 2011 | 97°F | 76°F | 0 mm | 0 mm | 0 mm | 13 mph | 6 mph |
| 2012 | 81°F | 73°F | 1.9 mm | 1.9 mm | 0 mm | 22 mph | 9 mph |
| 2013 | 90°F | 74°F | 6.1 mm | 6.1 mm | 0 mm | 24 mph | 8 mph |
| 2014 | 79°F | 67°F | 0.8 mm | 0.8 mm | 0 mm | 15 mph | 6 mph |
| 2015 | 85°F | 72°F | 0.9 mm | 0.9 mm | 0 mm | 16 mph | 6 mph |
| 2016 | 88°F | 71°F | 0 mm | 0 mm | 0 mm | 10 mph | 5 mph |
| 2017 | 93°F | 71°F | 0 mm | 0 mm | 0 mm | 23 mph | 9 mph |
| 2018 | 82°F | 67°F | 17.5 mm | 17.5 mm | 0 mm | 38 mph | 14 mph |
| 2019 | 94°F | 74°F | 0.1 mm | 0.1 mm | 0 mm | 24 mph | 9 mph |
| 2020 | 87°F | 73°F | 3.9 mm | 3.9 mm | 0 mm | 17 mph | 7 mph |
| 2021 | 85°F | 67°F | 0.3 mm | 0.3 mm | 0 mm | 16 mph | 6 mph |
| 2022 | 93°F | 70°F | 0.4 mm | 0.4 mm | 0 mm | 27 mph | 12 mph |
| 2023 | 90°F | 69°F | 5.8 mm | 5.8 mm | 0 mm | 23 mph | 10 mph |
| 2024 | 85°F | 62°F | 0 mm | 0 mm | 0 mm | 18 mph | 8 mph |
