September weather in Allendale, IL
The average temperature in Allendale in September is 69.9°F (58.9°F–81.0°F). Average precipitation: 3.51 inches.
September is a fall month in Allendale, and is warmer than the annual average of 56.4°F. Daily temperatures swing about 22.1°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
81.0°F
Avg Low
58.9°F
Precipitation
3.51 in
Daylight
12h 14m
September records in Allendale
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1995) | 45.0°F (1987) | 3.10 in (1950) |
| September 2 | 97.0°F (1999) | 48.9°F (1987) | 5.60 in (1931) |
| September 3 | 98.1°F (2002) | 50.0°F (1994) | 2.75 in (1932) |
| September 4 | 99.0°F (1999) | 46.9°F (1997) | 1.70 in (1910) |
| September 5 | 99.0°F (1999) | 45.0°F (1997) | 1.64 in (1894) |
| September 6 | 98.1°F (1998) | 42.1°F (1988) | 1.18 in (1910) |
| September 7 | 99.0°F (1990) | 48.0°F (1988) | 1.70 in (1934) |
| September 8 | 99.0°F (1990) | 39.9°F (1986) | 2.46 in (1914) |
| September 9 | 97.0°F (2002) | 44.1°F (1986) | 1.20 in (1899) |
| September 10 | 99.0°F (1980) | 48.0°F (1986) | 1.10 in (1992) |
| September 11 | 93.0°F (2005) | 46.9°F (1993) | 1.80 in (1922) |
| September 12 | 95.0°F (1983) | 45.0°F (1999) | 1.72 in (2008) |
| September 13 | 96.1°F (1991) | 42.1°F (1986) | 1.53 in (1933) |
| September 14 | 96.1°F (1980) | 42.1°F (1985) | 1.50 in (1904) |
| September 15 | 95.0°F (1991) | 39.0°F (2007) | 2.80 in (1930) |
| September 16 | 93.9°F (1991) | 37.0°F (2007) | 1.70 in (1996) |
| September 17 | 93.0°F (1991) | 43.0°F (1984) | 1.30 in (1918) |
| September 18 | 89.1°F (1948) | 44.1°F (1981) | 1.18 in (2001) |
| September 19 | 93.0°F (1948) | 41.0°F (1991) | 2.00 in (1896) |
| September 20 | 95.0°F (1948) | 37.0°F (1991) | 1.58 in (2002) |
| September 21 | 93.9°F (2007) | 36.0°F (1999) | 3.82 in (2009) |
| September 22 | 97.0°F (2010) | 37.0°F (1983) | 1.81 in (1934) |
| September 23 | 95.0°F (2007) | 35.1°F (1983) | 2.28 in (1914) |
| September 24 | 96.1°F (2007) | 33.1°F (1995) | 1.95 in (1977) |
| September 25 | 93.0°F (2007) | 34.0°F (2001) | 2.12 in (1945) |
| September 26 | 91.0°F (1986) | 39.9°F (1989) | 2.87 in (2011) |
| September 27 | 91.9°F (1986) | 36.0°F (1989) | 2.10 in (2007) |
| September 28 | 93.0°F (1998) | 37.0°F (1984) | 1.90 in (1908) |
| September 29 | 93.0°F (1986) | 37.0°F (1989) | 0.98 in (1934) |
| September 30 | 91.9°F (1986) | 35.1°F (2003) | 4.01 in (1927) |