May weather in South Barrington, IL
The average temperature in South Barrington in May is 58.4°F (48.3°F–68.5°F). Average precipitation: 5.15 inches.
May is a spring month in South Barrington, and is warmer than the annual average of 48°F. Daily temperatures swing about 20.2°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 23m. For travel, May is a wet month.
Avg High
68.5°F
Avg Low
48.3°F
Precipitation
5.15 in
Daylight
14h 23m
May records in South Barrington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1992) | 26.1°F (1963) | 2.06 in (2003) |
| May 2 | 84.0°F (1965) | 27.0°F (1966) | 1.02 in (1983) |
| May 3 | 86.0°F (1968) | 26.1°F (1971) | 2.83 in (2018) |
| May 4 | 84.0°F (1970) | 30.9°F (1966) | 0.77 in (2015) |
| May 5 | 84.9°F (1980) | 28.0°F (1989) | 1.37 in (2003) |
| May 6 | 84.9°F (1980) | 28.0°F (1989) | 1.39 in (1976) |
| May 7 | 84.0°F (2000) | 27.0°F (1974) | 1.30 in (1998) |
| May 8 | 84.9°F (1963) | 30.0°F (1976) | 1.61 in (1998) |
| May 9 | 88.0°F (1963) | 27.0°F (1966) | 2.00 in (2019) |
| May 10 | 86.0°F (1979) | 21.9°F (1966) | 1.10 in (1990) |
| May 11 | 89.1°F (2011) | 30.9°F (1966) | 1.61 in (1981) |
| May 12 | 90.0°F (2022) | 28.0°F (1981) | 1.98 in (2002) |
| May 13 | 90.0°F (2022) | 32.0°F (1971) | 3.07 in (2010) |
| May 14 | 88.0°F (2022) | 34.0°F (1964) | 1.24 in (2020) |
| May 15 | 89.1°F (2013) | 34.0°F (2016) | 2.71 in (2020) |
| May 16 | 89.1°F (2025) | 33.1°F (1984) | 1.38 in (1982) |
| May 17 | 90.0°F (1971) | 32.0°F (2014) | 1.03 in (1974) |
| May 18 | 88.0°F (1964) | 30.9°F (2002) | 2.28 in (1986) |
| May 19 | 93.0°F (1975) | 35.1°F (1976) | 0.99 in (2000) |
| May 20 | 89.1°F (1977) | 34.0°F (1981) | 2.52 in (1996) |
| May 21 | 89.1°F (1977) | 30.0°F (2002) | 1.31 in (1996) |
| May 22 | 89.1°F (1964) | 35.1°F (1971) | 1.55 in (2004) |
| May 23 | 88.0°F (1964) | 30.0°F (1963) | 0.90 in (1995) |
| May 24 | 87.1°F (1964) | 35.1°F (2013) | 1.75 in (2020) |
| May 25 | 90.0°F (2010) | 30.9°F (1992) | 1.23 in (1997) |
| May 26 | 87.1°F (1985) | 34.0°F (1983) | 1.77 in (2011) |
| May 27 | 90.0°F (1985) | 30.0°F (1992) | 1.31 in (2010) |
| May 28 | 93.0°F (2018) | 32.0°F (1971) | 1.65 in (2014) |
| May 29 | 91.0°F (1969) | 33.1°F (1965) | 1.35 in (1996) |
| May 30 | 90.0°F (1978) | 35.1°F (1964) | 2.08 in (2011) |
| May 31 | 89.1°F (1988) | 37.9°F (1966) | 4.48 in (2018) |