May weather in River Grove, IL
The average temperature in River Grove in May is 60.6°F (50.6°F–70.5°F). Average precipitation: 4.49 inches.
May is a spring month in River Grove, and is warmer than the annual average of 51.3°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 22m. For travel, May is a comfortable month to visit.
Avg High
70.5°F
Avg Low
50.6°F
Precipitation
4.49 in
Daylight
14h 22m
May records in River Grove
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 88.0°F (1992) | 28.9°F (1963) | 1.05 in (1983) |
| May 2 | 89.1°F (1959) | 28.0°F (1966) | 1.32 in (2018) |
| May 3 | 89.1°F (1959) | 30.0°F (2004) | 1.34 in (2012) |
| May 4 | 90.0°F (1959) | 32.0°F (1966) | 1.70 in (1990) |
| May 5 | 91.9°F (1959) | 32.0°F (1967) | 1.29 in (1991) |
| May 6 | 86.0°F (2000) | 30.0°F (1992) | 1.15 in (1976) |
| May 7 | 87.1°F (2023) | 28.9°F (1989) | 2.07 in (1998) |
| May 8 | 90.0°F (1963) | 28.9°F (1983) | 0.98 in (1964) |
| May 9 | 89.1°F (1979) | 27.0°F (1966) | 3.14 in (1990) |
| May 10 | 90.0°F (1979) | 24.1°F (1966) | 0.87 in (2017) |
| May 11 | 90.0°F (2022) | 33.1°F (1981) | 2.69 in (1966) |
| May 12 | 91.0°F (2022) | 30.9°F (1981) | 2.11 in (1970) |
| May 13 | 89.1°F (1991) | 34.0°F (1996) | 1.49 in (2010) |
| May 14 | 91.9°F (1982) | 34.0°F (1973) | 3.53 in (2020) |
| May 15 | 93.9°F (2025) | 35.1°F (2016) | 0.68 in (2020) |
| May 16 | 91.9°F (1962) | 33.1°F (1997) | 1.05 in (1960) |
| May 17 | 91.9°F (1962) | 36.0°F (1973) | 3.11 in (2020) |
| May 18 | 91.9°F (1977) | 34.0°F (2002) | 0.74 in (2000) |
| May 19 | 93.0°F (1977) | 36.0°F (1993) | 1.27 in (2005) |
| May 20 | 93.0°F (1977) | 33.1°F (2002) | 1.45 in (2004) |
| May 21 | 91.0°F (1977) | 30.9°F (2002) | 1.96 in (2018) |
| May 22 | 91.0°F (1977) | 35.1°F (1963) | 1.62 in (1983) |
| May 23 | 91.0°F (1977) | 32.0°F (1963) | 1.23 in (1995) |
| May 24 | 91.0°F (1977) | 34.0°F (1992) | 0.68 in (1997) |
| May 25 | 90.0°F (1977) | 32.0°F (1992) | 2.24 in (2011) |
| May 26 | 91.9°F (1967) | 34.0°F (1983) | 1.73 in (2009) |
| May 27 | 97.0°F (2012) | 33.1°F (1992) | 1.92 in (2019) |
| May 28 | 95.0°F (2012) | 33.1°F (1992) | 1.45 in (1996) |
| May 29 | 91.0°F (2006) | 32.0°F (1965) | 3.45 in (1981) |
| May 30 | 91.0°F (1988) | 34.0°F (1964) | 1.49 in (2004) |
| May 31 | 91.9°F (1988) | 37.0°F (1966) | 1.12 in (2012) |