September weather in Henry, IL
The average temperature in Henry in September is 67.4°F (55.1°F–79.6°F). Average precipitation: 3.30 inches.
September is a fall month in Henry, and is warmer than the annual average of 52.6°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
79.6°F
Avg Low
55.1°F
Precipitation
3.30 in
Daylight
12h 15m
September records in Henry
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (2000) | 45.0°F (2009) | 2.48 in (1989) |
| September 2 | 98.1°F (1960) | 42.1°F (1967) | 1.33 in (2012) |
| September 3 | 96.1°F (1960) | 42.1°F (1974) | 1.18 in (1991) |
| September 4 | 95.0°F (1960) | 39.9°F (1974) | 2.02 in (2008) |
| September 5 | 96.1°F (1961) | 39.9°F (1974) | 0.59 in (1994) |
| September 6 | 97.0°F (1960) | 42.1°F (1962) | 4.88 in (1989) |
| September 7 | 97.0°F (1959) | 41.0°F (1988) | 1.08 in (2018) |
| September 8 | 99.0°F (1978) | 37.9°F (1986) | 1.57 in (2016) |
| September 9 | 98.1°F (1978) | 43.0°F (1986) | 1.69 in (1992) |
| September 10 | 96.1°F (1978) | 43.0°F (1976) | 1.86 in (2014) |
| September 11 | 95.0°F (2000) | 41.0°F (1967) | 1.21 in (1986) |
| September 12 | 93.9°F (1991) | 42.1°F (1964) | 1.42 in (2020) |
| September 13 | 95.0°F (1978) | 37.9°F (1964) | 1.90 in (2008) |
| September 14 | 93.9°F (1971) | 37.9°F (1975) | 2.15 in (1961) |
| September 15 | 90.0°F (1991) | 36.0°F (2007) | 1.26 in (1977) |
| September 16 | 90.0°F (1978) | 37.9°F (1984) | 0.95 in (1965) |
| September 17 | 90.0°F (1988) | 41.0°F (1984) | 1.62 in (1997) |
| September 18 | 90.0°F (1972) | 36.0°F (1959) | 2.70 in (1977) |
| September 19 | 93.9°F (1978) | 36.0°F (1991) | 1.68 in (2022) |
| September 20 | 91.9°F (1978) | 30.0°F (1991) | 4.09 in (1986) |
| September 21 | 90.0°F (2007) | 30.9°F (1991) | 0.93 in (1992) |
| September 22 | 93.0°F (2005) | 33.1°F (1974) | 2.45 in (1970) |
| September 23 | 91.9°F (2007) | 28.0°F (1974) | 2.20 in (1961) |
| September 24 | 93.0°F (2007) | 30.0°F (1989) | 1.83 in (1970) |
| September 25 | 87.1°F (1984) | 34.0°F (1989) | 1.48 in (1986) |
| September 26 | 89.1°F (1998) | 35.1°F (1984) | 1.63 in (1964) |
| September 27 | 87.1°F (1971) | 34.0°F (1989) | 0.77 in (2023) |
| September 28 | 88.0°F (1971) | 34.0°F (1961) | 3.24 in (1999) |
| September 29 | 88.0°F (2002) | 32.0°F (1967) | 0.94 in (1972) |
| September 30 | 90.0°F (1971) | 28.0°F (1984) | 1.10 in (1986) |