May weather in Sumner, IL
The average temperature in Sumner in May is 65.2°F (53.6°F–76.8°F). Average precipitation: 5.33 inches.
May is a spring month in Sumner, and is warmer than the annual average of 54.9°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 7m. For travel, May is a wet month.
Avg High
76.8°F
Avg Low
53.6°F
Precipitation
5.33 in
Daylight
14h 7m
May records in Sumner
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (2007) | 32.0°F (1963) | 2.08 in (1983) |
| May 2 | 84.9°F (2007) | 35.1°F (1994) | 2.60 in (2011) |
| May 3 | 90.0°F (2012) | 35.1°F (1994) | 1.40 in (1997) |
| May 4 | 89.1°F (2012) | 35.1°F (2022) | 1.11 in (2017) |
| May 5 | 88.0°F (2001) | 36.0°F (1995) | 1.92 in (2003) |
| May 6 | 87.1°F (2001) | 37.0°F (1992) | 0.61 in (1981) |
| May 7 | 88.0°F (2012) | 37.0°F (1992) | 2.38 in (2002) |
| May 8 | 84.9°F (2004) | 37.0°F (1992) | 2.87 in (2008) |
| May 9 | 88.0°F (1963) | 39.0°F (2010) | 1.86 in (2003) |
| May 10 | 87.1°F (1963) | 36.0°F (2021) | 1.51 in (1981) |
| May 11 | 91.0°F (2018) | 39.0°F (1997) | 2.35 in (2017) |
| May 12 | 91.0°F (2018) | 39.0°F (2021) | 1.65 in (1964) |
| May 13 | 91.9°F (2018) | 39.9°F (2013) | 3.80 in (2002) |
| May 14 | 91.9°F (2018) | 37.9°F (1996) | 2.21 in (2009) |
| May 15 | 91.9°F (2018) | 39.9°F (2016) | 1.12 in (1974) |
| May 16 | 91.9°F (2001) | 35.1°F (1997) | 2.98 in (1990) |
| May 17 | 93.9°F (2001) | 35.1°F (1997) | 2.52 in (1995) |
| May 18 | 88.0°F (1998) | 37.0°F (2002) | 4.32 in (1995) |
| May 19 | 90.0°F (1996) | 37.0°F (2002) | 1.07 in (1981) |
| May 20 | 91.9°F (1998) | 39.0°F (2002) | 2.35 in (2005) |
| May 21 | 91.9°F (2012) | 43.0°F (2023) | 0.84 in (2010) |
| May 22 | 90.0°F (2018) | 39.0°F (1997) | 1.35 in (2019) |
| May 23 | 90.0°F (2004) | 39.0°F (1997) | 1.75 in (1998) |
| May 24 | 91.0°F (2010) | 44.1°F (1963) | 1.22 in (1978) |
| May 25 | 93.0°F (2018) | 44.1°F (1999) | 1.61 in (1971) |
| May 26 | 93.0°F (2012) | 45.0°F (1992) | 2.74 in (1986) |
| May 27 | 93.0°F (2012) | 42.1°F (1992) | 2.38 in (2024) |
| May 28 | 95.0°F (2012) | 42.1°F (1992) | 3.87 in (1995) |
| May 29 | 95.0°F (2018) | 44.1°F (1994) | 0.52 in (2019) |
| May 30 | 91.0°F (1998) | 41.0°F (2021) | 1.57 in (1982) |
| May 31 | 91.0°F (2007) | 48.0°F (2021) | 2.08 in (1974) |