April weather in Seneca, IL
The average temperature in Seneca in April is 49.2°F (37.3°F–61.2°F). Average precipitation: 3.59 inches. Average snowfall is 0.3 inches.
April is a spring month in Seneca, and is cooler than the annual average of 49.7°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 7m. For travel, April is cool.
Avg High
61.2°F
Avg Low
37.3°F
Precipitation
3.59 in
Snow
0.3 in
April records in Seneca
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 79.0°F (2010) | 21.0°F (2011) | 2.03 in (2024) |
| April 2 | 84.0°F (2010) | 23.0°F (2013) | 2.05 in (1983) |
| April 3 | 79.0°F (2010) | 19.9°F (2013) | 1.74 in (2026) |
| April 4 | 82.0°F (2011) | 19.9°F (2013) | 1.16 in (1950) |
| April 5 | 78.1°F (2005) | 21.9°F (2002) | 2.12 in (1947) |
| April 6 | 78.1°F (2021) | 21.9°F (2016) | 2.04 in (1958) |
| April 7 | 81.0°F (2010) | 21.9°F (2007) | 0.86 in (1942) |
| April 8 | 82.9°F (2001) | 21.9°F (2007) | 0.92 in (1980) |
| April 9 | 81.0°F (2001) | 18.0°F (1997) | 1.69 in (1995) |
| April 10 | 80.1°F (2001) | 19.9°F (1997) | 2.33 in (1950) |
| April 11 | 84.0°F (2011) | 24.1°F (2003) | 1.65 in (2013) |
| April 12 | 82.9°F (1977) | 25.0°F (2003) | 1.57 in (1979) |
| April 13 | 84.0°F (1977) | 25.0°F (2016) | 1.92 in (1952) |
| April 14 | 84.9°F (2006) | 24.1°F (1997) | 2.90 in (1981) |
| April 15 | 86.0°F (2026) | 24.1°F (1997) | 1.43 in (1991) |
| April 16 | 88.0°F (2002) | 24.1°F (1997) | 1.45 in (1999) |
| April 17 | 87.1°F (1977) | 26.1°F (2020) | 2.11 in (1982) |
| April 18 | 88.0°F (2026) | 27.0°F (2001) | 4.16 in (2013) |
| April 19 | 90.0°F (2002) | 26.1°F (2023) | 0.90 in (1970) |
| April 20 | 81.0°F (2005) | 30.9°F (1999) | 2.00 in (2000) |
| April 21 | 80.1°F (1977) | 27.0°F (2024) | 1.60 in (1973) |
| April 22 | 82.9°F (2001) | 28.0°F (2024) | 1.05 in (1984) |
| April 23 | 82.0°F (2007) | 28.0°F (2003) | 1.32 in (1976) |
| April 24 | 81.0°F (2022) | 26.1°F (2015) | 1.37 in (1965) |
| April 25 | 82.0°F (2009) | 28.9°F (2015) | 3.02 in (1950) |
| April 26 | 84.9°F (2016) | 27.0°F (2023) | 1.09 in (2020) |
| April 27 | 81.0°F (2009) | 26.1°F (2023) | 1.90 in (1943) |
| April 28 | 84.0°F (2021) | 28.9°F (2012) | 1.28 in (2016) |
| April 29 | 84.0°F (2025) | 27.0°F (1977) | 2.64 in (1956) |
| April 30 | 82.9°F (2007) | 27.0°F (2017) | 3.20 in (2017) |