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Precipitation patterns have also fluctuated, with April 20, 2011 recording the highest precipitation in the past 15 years at 22.3 mm, all of which came from rainfall. Interestingly, eight 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 April 20 reaching 40 mph (2011) and the highest sustained wind speed recorded at 15 mph (2015).
These historical trends suggest that the weather on April 20 in Petersburg has been quite unpredictable over the years.
Historical April 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 | 66°F | 47°F | 0 mm | 0 mm | 0 mm | 15 mph | 7 mph |
| 2011 | 67°F | 48°F | 22.3 mm | 22.3 mm | 0 mm | 40 mph | 14 mph |
| 2012 | 73°F | 53°F | 0.2 mm | 0.2 mm | 0 mm | 33 mph | 13 mph |
| 2013 | 52°F | 38°F | 0 mm | 0 mm | 0 mm | 27 mph | 11 mph |
| 2014 | 73°F | 45°F | 0 mm | 0 mm | 0 mm | 12 mph | 7 mph |
| 2015 | 62°F | 50°F | 10.2 mm | 10.2 mm | 0 mm | 35 mph | 15 mph |
| 2016 | 80°F | 54°F | 0 mm | 0 mm | 0 mm | 19 mph | 8 mph |
| 2017 | 79°F | 62°F | 2 mm | 2 mm | 0 mm | 38 mph | 14 mph |
| 2018 | 57°F | 33°F | 0 mm | 0 mm | 0 mm | 15 mph | 7 mph |
| 2019 | 44°F | 40°F | 17.3 mm | 17.3 mm | 0 mm | 29 mph | 13 mph |
| 2020 | 62°F | 39°F | 0 mm | 0 mm | 0 mm | 20 mph | 9 mph |
| 2021 | 64°F | 35°F | 4.7 mm | 2.7 mm | 14 mm | 30 mph | 13 mph |
| 2022 | 64°F | 37°F | 0.1 mm | 0.1 mm | 0 mm | 23 mph | 10 mph |
| 2023 | 82°F | 54°F | 0 mm | 0 mm | 0 mm | 30 mph | 13 mph |
| 2024 | 54°F | 43°F | 0 mm | 0 mm | 0 mm | 25 mph | 10 mph |
