May weather in Hillsboro, IL
The average temperature in Hillsboro in May is 66.0°F (54.3°F–77.7°F). Average precipitation: 5.06 inches.
May is a spring month in Hillsboro, and is warmer than the annual average of 55.5°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 9m. For travel, May is a wet month.
Avg High
77.7°F
Avg Low
54.3°F
Precipitation
5.06 in
Daylight
14h 9m
May records in Hillsboro
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (1895) | 28.9°F (1903) | 2.86 in (1983) |
| May 2 | 93.0°F (1895) | 32.0°F (1907) | 1.70 in (1935) |
| May 3 | 91.0°F (1895) | 30.9°F (1967) | 1.14 in (1929) |
| May 4 | 91.9°F (1955) | 30.0°F (1971) | 2.21 in (2017) |
| May 5 | 91.0°F (1895) | 32.0°F (1917) | 1.78 in (1919) |
| May 6 | 90.0°F (1924) | 30.0°F (1944) | 1.89 in (1900) |
| May 7 | 90.0°F (1986) | 30.9°F (1906) | 2.60 in (2002) |
| May 8 | 91.9°F (1986) | 34.0°F (1923) | 1.94 in (1961) |
| May 9 | 91.9°F (1934) | 32.0°F (1960) | 1.65 in (1909) |
| May 10 | 91.9°F (1963) | 28.0°F (1966) | 2.34 in (1899) |
| May 11 | 93.0°F (2022) | 33.1°F (1907) | 1.90 in (1962) |
| May 12 | 91.9°F (2022) | 32.0°F (1960) | 2.57 in (1929) |
| May 13 | 90.0°F (2018) | 34.0°F (1960) | 3.44 in (2002) |
| May 14 | 93.0°F (1987) | 32.0°F (1920) | 2.27 in (2004) |
| May 15 | 91.0°F (2013) | 35.1°F (1920) | 2.20 in (1990) |
| May 16 | 91.9°F (2001) | 35.1°F (1921) | 2.66 in (1953) |
| May 17 | 91.0°F (1962) | 35.1°F (2014) | 3.90 in (1943) |
| May 18 | 91.0°F (1906) | 36.0°F (2002) | 3.30 in (1966) |
| May 19 | 91.9°F (1911) | 36.0°F (1929) | 2.15 in (1896) |
| May 20 | 95.0°F (1987) | 37.9°F (1986) | 1.34 in (1915) |
| May 21 | 98.1°F (1992) | 35.1°F (1929) | 1.37 in (1898) |
| May 22 | 95.0°F (1925) | 33.1°F (1924) | 1.98 in (2019) |
| May 23 | 95.0°F (1925) | 36.0°F (1931) | 2.05 in (1910) |
| May 24 | 91.9°F (1921) | 39.9°F (1925) | 2.50 in (2024) |
| May 25 | 93.0°F (2010) | 28.0°F (1925) | 4.02 in (1990) |
| May 26 | 96.1°F (1953) | 33.1°F (1925) | 1.84 in (1997) |
| May 27 | 96.1°F (1911) | 35.1°F (1961) | 2.57 in (1919) |
| May 28 | 95.0°F (1911) | 37.0°F (1907) | 2.62 in (2004) |
| May 29 | 97.0°F (1911) | 39.9°F (1947) | 1.37 in (1991) |
| May 30 | 96.1°F (1895) | 37.9°F (1947) | 2.51 in (1959) |
| May 31 | 99.0°F (1895) | 35.1°F (1930) | 3.06 in (1974) |