April weather in Petersburg, IL
The average temperature in Petersburg in April is 52.5°F (41.3°F–63.7°F). Average precipitation: 4.09 inches. Average snowfall is 0.5 inches.
April is a spring month in Petersburg, and is warmer than the annual average of 52.3°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 4m. For travel, April is a comfortable month to visit.
Avg High
63.7°F
Avg Low
41.3°F
Precipitation
4.09 in
Snow
0.5 in
April records in Petersburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 78.1°F (2023) | 24.1°F (2021) | 0.49 in (2008) |
| April 2 | 73.9°F (2015) | 12.0°F (2018) | 1.78 in (2024) |
| April 3 | 73.9°F (2025) | 12.0°F (2018) | 0.89 in (1989) |
| April 4 | 77.0°F (2023) | 24.1°F (2018) | 0.72 in (2007) |
| April 5 | 84.0°F (2023) | 23.0°F (2018) | 0.98 in (2017) |
| April 6 | 81.0°F (2021) | 27.0°F (2018) | 0.71 in (2006) |
| April 7 | 81.0°F (2021) | 18.0°F (2018) | 1.39 in (2006) |
| April 8 | 82.0°F (2020) | 19.0°F (2018) | 0.67 in (2021) |
| April 9 | 87.1°F (2020) | 19.9°F (2016) | 0.65 in (2002) |
| April 10 | 79.0°F (2015) | 27.0°F (2016) | 0.49 in (1994) |
| April 11 | 75.0°F (2017) | 28.9°F (2018) | 1.61 in (2013) |
| April 12 | 80.1°F (2023) | 26.1°F (2016) | 2.71 in (1994) |
| April 13 | 82.0°F (2018) | 33.1°F (2016) | 0.33 in (2005) |
| April 14 | 82.0°F (2023) | 28.0°F (2020) | 1.28 in (1993) |
| April 15 | 87.1°F (2024) | 28.9°F (2020) | 2.43 in (1993) |
| April 16 | 82.0°F (2017) | 27.0°F (2020) | 1.16 in (1999) |
| April 17 | 81.0°F (2024) | 27.0°F (2018) | 0.94 in (2003) |
| April 18 | 80.1°F (2016) | 28.9°F (2018) | 0.97 in (2013) |
| April 19 | 80.1°F (2016) | 28.9°F (2022) | 0.78 in (2024) |
| April 20 | 84.0°F (2017) | 30.9°F (2018) | 0.92 in (2015) |
| April 21 | 80.1°F (2023) | 28.0°F (2021) | 0.96 in (2025) |
| April 22 | 79.0°F (2019) | 30.0°F (2021) | 0.55 in (2005) |
| April 23 | 82.9°F (2022) | 32.0°F (2015) | 0.36 in (1989) |
| April 24 | 84.0°F (2022) | 30.0°F (2023) | 0.73 in (2024) |
| April 25 | 82.0°F (2025) | 34.0°F (2023) | 1.36 in (2004) |
| April 26 | 82.9°F (2016) | 33.1°F (2022) | 1.72 in (2020) |
| April 27 | 79.0°F (2021) | 33.1°F (2015) | 0.95 in (2017) |
| April 28 | 82.9°F (2021) | 35.1°F (2019) | 2.22 in (2002) |
| April 29 | 84.0°F (2025) | 35.1°F (2018) | 1.49 in (2024) |
| April 30 | 73.0°F (2024) | 37.0°F (2018) | 3.47 in (2017) |