September weather in Mazon, IL
The average temperature in Mazon in September is 66.1°F (54.8°F–77.4°F). Average precipitation: 3.55 inches.
September is a fall month in Mazon, and is warmer than the annual average of 50.8°F. Daily temperatures swing about 22.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
77.4°F
Avg Low
54.8°F
Precipitation
3.55 in
Daylight
12h 16m
September records in Mazon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1953) | 41.0°F (1967) | 1.24 in (2010) |
| September 2 | 102.0°F (1922) | 39.0°F (1946) | 2.97 in (1930) |
| September 3 | 99.0°F (1913) | 44.1°F (1952) | 2.40 in (1926) |
| September 4 | 102.0°F (1925) | 42.1°F (1997) | 2.63 in (2019) |
| September 5 | 102.0°F (1925) | 42.1°F (1935) | 3.00 in (1941) |
| September 6 | 102.9°F (1922) | 37.9°F (1962) | 2.75 in (1914) |
| September 7 | 102.0°F (1939) | 41.0°F (1932) | 0.96 in (1917) |
| September 8 | 102.9°F (1922) | 39.9°F (1956) | 3.34 in (1942) |
| September 9 | 97.0°F (1919) | 41.0°F (1914) | 1.21 in (2008) |
| September 10 | 98.1°F (1912) | 37.9°F (1924) | 2.66 in (1922) |
| September 11 | 97.0°F (1931) | 33.1°F (1917) | 1.41 in (1921) |
| September 12 | 97.0°F (1939) | 37.9°F (1917) | 2.05 in (1936) |
| September 13 | 100.9°F (1939) | 33.1°F (1964) | 4.16 in (2006) |
| September 14 | 102.0°F (1939) | 33.1°F (1923) | 2.72 in (1961) |
| September 15 | 102.9°F (1939) | 35.1°F (1923) | 1.80 in (1970) |
| September 16 | 97.0°F (1927) | 30.9°F (1916) | 1.65 in (1936) |
| September 17 | 98.1°F (1927) | 30.9°F (1937) | 1.22 in (1997) |
| September 18 | 93.9°F (2018) | 33.1°F (1916) | 1.34 in (1927) |
| September 19 | 95.0°F (1925) | 36.0°F (1929) | 3.16 in (1967) |
| September 20 | 93.0°F (1920) | 30.9°F (1937) | 0.92 in (1924) |
| September 21 | 97.0°F (2022) | 32.0°F (1962) | 2.16 in (1967) |
| September 22 | 93.9°F (1956) | 32.0°F (1913) | 2.58 in (1951) |
| September 23 | 95.0°F (2017) | 34.0°F (1913) | 3.06 in (1961) |
| September 24 | 96.1°F (2017) | 33.1°F (1928) | 1.50 in (1945) |
| September 25 | 93.9°F (1920) | 33.1°F (1942) | 2.20 in (1941) |
| September 26 | 93.9°F (2017) | 28.9°F (1940) | 1.48 in (1935) |
| September 27 | 91.9°F (1998) | 28.9°F (1937) | 2.03 in (1996) |
| September 28 | 91.0°F (1939) | 26.1°F (1942) | 6.51 in (2019) |
| September 29 | 97.0°F (1953) | 30.9°F (1949) | 1.30 in (1929) |
| September 30 | 91.9°F (1953) | 30.0°F (2003) | 2.00 in (1919) |