May weather in South Pekin, IL
The average temperature in South Pekin in May is 63.5°F (52.8°F–74.2°F). Average precipitation: 4.69 inches.
May is a spring month in South Pekin, and is warmer than the annual average of 52.7°F. Daily temperatures swing about 21.4°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 15m. For travel, May is a comfortable month to visit.
Avg High
74.2°F
Avg Low
52.8°F
Precipitation
4.69 in
Daylight
14h 15m
May records in South Pekin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 88.0°F (1952) | 30.9°F (1963) | 1.97 in (1983) |
| May 2 | 88.0°F (1959) | 30.9°F (1961) | 1.02 in (2019) |
| May 3 | 89.1°F (1959) | 28.0°F (2005) | 1.21 in (2013) |
| May 4 | 90.0°F (1952) | 30.0°F (2005) | 1.75 in (1977) |
| May 5 | 91.9°F (1952) | 32.0°F (1944) | 1.01 in (1998) |
| May 6 | 88.0°F (1949) | 30.9°F (1944) | 1.31 in (1976) |
| May 7 | 89.1°F (2014) | 28.9°F (1989) | 1.51 in (1945) |
| May 8 | 88.0°F (1963) | 33.1°F (1966) | 2.51 in (1995) |
| May 9 | 90.0°F (1963) | 30.2°F (2020) | 1.61 in (2021) |
| May 10 | 90.0°F (2011) | 25.0°F (1966) | 1.22 in (1943) |
| May 11 | 93.0°F (2022) | 35.1°F (1945) | 2.34 in (2002) |
| May 12 | 91.9°F (1956) | 32.0°F (1960) | 1.33 in (2002) |
| May 13 | 90.0°F (2022) | 30.0°F (1971) | 3.10 in (1957) |
| May 14 | 90.0°F (1987) | 36.0°F (1980) | 1.29 in (1970) |
| May 15 | 93.0°F (2025) | 36.0°F (1973) | 2.43 in (1968) |
| May 16 | 90.0°F (2001) | 33.1°F (1997) | 1.46 in (1960) |
| May 17 | 90.0°F (1982) | 34.0°F (1973) | 1.39 in (1986) |
| May 18 | 89.1°F (1964) | 34.0°F (2002) | 1.96 in (2021) |
| May 19 | 91.9°F (1975) | 39.0°F (1995) | 0.84 in (1974) |
| May 20 | 91.9°F (1987) | 35.1°F (1954) | 1.75 in (2025) |
| May 21 | 93.0°F (1987) | 33.1°F (2002) | 1.24 in (2018) |
| May 22 | 90.0°F (1964) | 35.1°F (1963) | 0.86 in (2019) |
| May 23 | 91.9°F (1975) | 35.1°F (1963) | 1.41 in (2008) |
| May 24 | 91.9°F (1950) | 37.0°F (1979) | 1.51 in (1995) |
| May 25 | 91.0°F (1967) | 34.0°F (1992) | 2.79 in (2011) |
| May 26 | 91.9°F (1985) | 34.0°F (1979) | 1.57 in (2013) |
| May 27 | 97.0°F (2018) | 35.1°F (1992) | 1.66 in (1996) |
| May 28 | 95.0°F (2018) | 37.9°F (1965) | 3.09 in (1956) |
| May 29 | 93.0°F (2006) | 33.1°F (1965) | 1.60 in (1976) |
| May 30 | 91.9°F (2023) | 37.9°F (1947) | 1.46 in (2004) |
| May 31 | 91.0°F (1988) | 41.0°F (1972) | 2.65 in (1958) |