September weather in Streator, IL
The average temperature in Streator in September is 66.4°F (55.2°F–77.6°F). Average precipitation: 3.56 inches.
September is a fall month in Streator, and is warmer than the annual average of 51.7°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.6°F
Avg Low
55.2°F
Precipitation
3.56 in
Daylight
12h 15m
September records in Streator
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1913) | 42.1°F (1915) | 1.80 in (1977) |
| September 2 | 102.0°F (1913) | 37.9°F (1909) | 1.75 in (2012) |
| September 3 | 99.0°F (1913) | 34.0°F (1915) | 2.02 in (2010) |
| September 4 | 99.0°F (1912) | 41.0°F (1908) | 1.11 in (1953) |
| September 5 | 102.9°F (1899) | 45.0°F (1902) | 3.07 in (1941) |
| September 6 | 100.0°F (1912) | 42.1°F (1918) | 2.84 in (1989) |
| September 7 | 100.0°F (1899) | 46.0°F (1908) | 2.03 in (1989) |
| September 8 | 99.0°F (1912) | 48.9°F (1944) | 1.92 in (1938) |
| September 9 | 100.0°F (1912) | 43.0°F (1914) | 1.63 in (1992) |
| September 10 | 100.0°F (1912) | 39.9°F (1910) | 2.16 in (2006) |
| September 11 | 97.0°F (1908) | 34.0°F (1917) | 1.17 in (1915) |
| September 12 | 97.0°F (1908) | 34.0°F (1917) | 1.60 in (1974) |
| September 13 | 100.0°F (1939) | 37.0°F (1902) | 4.23 in (2008) |
| September 14 | 100.0°F (1939) | 36.0°F (1902) | 3.05 in (2008) |
| September 15 | 102.0°F (1939) | 37.0°F (1904) | 1.89 in (1914) |
| September 16 | 93.9°F (1897) | 30.9°F (1916) | 2.50 in (1978) |
| September 17 | 93.9°F (1908) | 34.0°F (1916) | 2.90 in (1978) |
| September 18 | 95.0°F (1908) | 32.0°F (1900) | 1.45 in (1899) |
| September 19 | 96.1°F (1908) | 32.0°F (1896) | 2.24 in (1986) |
| September 20 | 96.1°F (1908) | 32.0°F (1901) | 1.03 in (1944) |
| September 21 | 95.0°F (1908) | 34.0°F (1901) | 2.29 in (1947) |
| September 22 | 93.0°F (1940) | 32.0°F (1918) | 1.87 in (1970) |
| September 23 | 91.9°F (2017) | 35.1°F (1913) | 1.00 in (2023) |
| September 24 | 91.9°F (1908) | 35.1°F (1942) | 4.48 in (1961) |
| September 25 | 91.9°F (1900) | 32.0°F (1893) | 2.29 in (1941) |
| September 26 | 91.9°F (1946) | 33.1°F (1942) | 3.17 in (1933) |
| September 27 | 91.0°F (1905) | 28.0°F (1899) | 2.30 in (1907) |
| September 28 | 91.0°F (1939) | 28.0°F (1942) | 4.39 in (2019) |
| September 29 | 89.1°F (1897) | 28.0°F (1899) | 2.12 in (1981) |
| September 30 | 91.9°F (1897) | 19.9°F (1899) | 1.10 in (1902) |