April weather in Sullivan, IN
The average temperature in Sullivan in April is 55.0°F (44.1°F–65.8°F). Average precipitation: 5.07 inches.
April is a spring month in Sullivan, and is warmer than the annual average of 54.4°F. Daily temperatures swing about 21.7°F between overnight low and afternoon high. Daylight averages about 13h 2m. For travel, April is a wet month.
Avg High
65.8°F
Avg Low
44.1°F
Precipitation
5.07 in
Daylight
13h 2m
April records in Sullivan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 77.0°F (2010) | 24.1°F (1995) | 1.10 in (1993) |
| April 2 | 81.0°F (2010) | 27.0°F (2022) | 3.02 in (2024) |
| April 3 | 82.0°F (2025) | 23.0°F (1992) | 2.00 in (2025) |
| April 4 | 84.0°F (2012) | 27.0°F (1994) | 2.60 in (2014) |
| April 5 | 82.0°F (2023) | 21.0°F (1995) | 3.93 in (2025) |
| April 6 | 80.1°F (2010) | 19.9°F (2002) | 1.82 in (2009) |
| April 7 | 82.9°F (2010) | 19.0°F (1990) | 3.16 in (2006) |
| April 8 | 82.0°F (2001) | 19.0°F (1990) | 0.87 in (2014) |
| April 9 | 84.0°F (2020) | 21.0°F (1997) | 1.35 in (1995) |
| April 10 | 82.9°F (2001) | 26.1°F (2004) | 2.17 in (1994) |
| April 11 | 82.0°F (2005) | 23.0°F (1989) | 2.79 in (2024) |
| April 12 | 81.0°F (2001) | 26.1°F (1990) | 2.00 in (1994) |
| April 13 | 80.1°F (2006) | 28.9°F (2007) | 2.47 in (2005) |
| April 14 | 84.0°F (2006) | 26.1°F (1997) | 1.37 in (2022) |
| April 15 | 84.9°F (2006) | 28.0°F (2008) | 0.87 in (1991) |
| April 16 | 87.1°F (2006) | 25.0°F (2020) | 1.63 in (1998) |
| April 17 | 84.9°F (2024) | 28.0°F (2020) | 0.97 in (1995) |
| April 18 | 86.0°F (2004) | 27.0°F (1990) | 1.93 in (1992) |
| April 19 | 86.0°F (2004) | 32.0°F (2020) | 1.14 in (2019) |
| April 20 | 84.9°F (2002) | 32.0°F (2018) | 1.38 in (2015) |
| April 21 | 84.0°F (2023) | 30.9°F (2011) | 1.02 in (2017) |
| April 22 | 75.9°F (1999) | 28.0°F (1993) | 0.86 in (1996) |
| April 23 | 82.9°F (2001) | 28.0°F (1993) | 1.43 in (1996) |
| April 24 | 84.9°F (2022) | 27.0°F (2023) | 0.79 in (1995) |
| April 25 | 84.9°F (1990) | 27.0°F (2023) | 1.11 in (2007) |
| April 26 | 87.1°F (2004) | 37.0°F (2001) | 1.31 in (2019) |
| April 27 | 82.9°F (1990) | 35.1°F (2006) | 1.10 in (2016) |
| April 28 | 84.0°F (1989) | 32.0°F (2010) | 2.30 in (2009) |
| April 29 | 84.0°F (2025) | 30.0°F (1996) | 2.20 in (2017) |
| April 30 | 81.0°F (2007) | 36.0°F (2008) | 2.14 in (1998) |