May weather in South Wilmington, IL
The average temperature in South Wilmington in May is 60.7°F (49.3°F–72.1°F). Average precipitation: 4.85 inches.
May is a spring month in South Wilmington, and is warmer than the annual average of 49.3°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 19m. For travel, May is a comfortable month to visit.
Avg High
72.1°F
Avg Low
49.3°F
Precipitation
4.85 in
Daylight
14h 19m
May records in South Wilmington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2001) | 33.1°F (1994) | 2.36 in (2019) |
| May 2 | 87.1°F (1992) | 34.0°F (2005) | 0.67 in (2000) |
| May 3 | 86.0°F (2018) | 27.0°F (2005) | 0.90 in (2022) |
| May 4 | 87.1°F (2001) | 24.1°F (2005) | 1.45 in (2003) |
| May 5 | 82.9°F (1999) | 30.0°F (2005) | 0.40 in (1991) |
| May 6 | 87.1°F (2000) | 28.9°F (1992) | 1.15 in (1999) |
| May 7 | 88.0°F (2000) | 32.0°F (1992) | 2.41 in (2012) |
| May 8 | 88.0°F (2023) | 32.0°F (2021) | 1.65 in (1998) |
| May 9 | 89.1°F (2014) | 27.0°F (2020) | 1.60 in (2021) |
| May 10 | 90.0°F (1993) | 32.0°F (2020) | 1.60 in (2016) |
| May 11 | 91.0°F (2011) | 37.0°F (2020) | 1.55 in (2003) |
| May 12 | 95.0°F (2022) | 34.0°F (2021) | 2.02 in (2002) |
| May 13 | 91.9°F (2022) | 36.0°F (2013) | 1.35 in (2009) |
| May 14 | 91.0°F (2022) | 34.0°F (1996) | 1.72 in (2024) |
| May 15 | 91.0°F (1998) | 34.0°F (2016) | 3.08 in (2020) |
| May 16 | 91.0°F (2025) | 34.0°F (1997) | 0.48 in (1991) |
| May 17 | 93.0°F (2001) | 32.0°F (2008) | 1.31 in (1991) |
| May 18 | 90.0°F (1996) | 30.9°F (2002) | 1.94 in (2020) |
| May 19 | 91.0°F (1996) | 35.1°F (2002) | 0.99 in (2019) |
| May 20 | 91.9°F (1996) | 32.0°F (2008) | 0.57 in (2025) |
| May 21 | 89.1°F (2012) | 28.9°F (2002) | 1.69 in (2013) |
| May 22 | 90.0°F (1992) | 35.1°F (2002) | 0.75 in (2019) |
| May 23 | 88.0°F (1994) | 41.0°F (2006) | 0.92 in (1993) |
| May 24 | 90.0°F (1994) | 37.0°F (1992) | 1.69 in (1995) |
| May 25 | 93.0°F (2010) | 35.1°F (1992) | 2.52 in (1991) |
| May 26 | 89.1°F (2010) | 35.1°F (1992) | 1.85 in (2011) |
| May 27 | 93.0°F (2012) | 30.9°F (1992) | 1.75 in (1996) |
| May 28 | 96.1°F (2018) | 35.1°F (1992) | 0.42 in (2022) |
| May 29 | 96.1°F (2018) | 41.0°F (1992) | 1.17 in (2019) |
| May 30 | 91.0°F (2006) | 37.9°F (1996) | 1.03 in (2006) |
| May 31 | 91.9°F (1998) | 42.1°F (1992) | 2.65 in (2004) |