September weather in Butler, PA
The average temperature in Butler in September is 61.9°F (49.6°F–74.3°F). Average precipitation: 4.09 inches.
September is a fall month in Butler, and is warmer than the annual average of 48.5°F. Daily temperatures swing about 24.7°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
74.3°F
Avg Low
49.6°F
Precipitation
4.09 in
Daylight
12h 15m
September records in Butler
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (1973) | 36.0°F (1976) | 1.36 in (2001) |
| September 2 | 93.0°F (1973) | 39.0°F (1970) | 1.82 in (2019) |
| September 3 | 91.9°F (1973) | 39.0°F (1970) | 1.12 in (1982) |
| September 4 | 93.9°F (1973) | 39.9°F (1997) | 1.35 in (1970) |
| September 5 | 91.0°F (1973) | 37.9°F (1974) | 0.62 in (1970) |
| September 6 | 91.9°F (1973) | 37.0°F (1976) | 1.19 in (1975) |
| September 7 | 91.0°F (1998) | 37.9°F (1976) | 2.20 in (1990) |
| September 8 | 93.9°F (1985) | 35.1°F (1986) | 2.60 in (1987) |
| September 9 | 93.0°F (2002) | 36.0°F (1986) | 3.90 in (2004) |
| September 10 | 93.0°F (2002) | 36.0°F (1986) | 3.80 in (2018) |
| September 11 | 91.9°F (1983) | 36.0°F (1969) | 1.17 in (1968) |
| September 12 | 89.1°F (2019) | 37.9°F (1969) | 0.96 in (1972) |
| September 13 | 87.1°F (1982) | 37.0°F (1985) | 1.39 in (1974) |
| September 14 | 89.1°F (1982) | 32.0°F (1975) | 2.36 in (1980) |
| September 15 | 91.0°F (1998) | 32.0°F (1975) | 0.50 in (1978) |
| September 16 | 89.1°F (1991) | 37.0°F (1985) | 0.72 in (1970) |
| September 17 | 90.0°F (1991) | 32.0°F (1986) | 0.91 in (2010) |
| September 18 | 87.1°F (1972) | 33.1°F (1984) | 4.72 in (2004) |
| September 19 | 84.9°F (1978) | 36.0°F (1973) | 1.15 in (2003) |
| September 20 | 88.0°F (1983) | 33.1°F (1979) | 1.06 in (2015) |
| September 21 | 89.1°F (1978) | 35.1°F (1979) | 0.69 in (1998) |
| September 22 | 88.0°F (1978) | 33.1°F (1999) | 3.35 in (1992) |
| September 23 | 89.1°F (1970) | 32.0°F (1983) | 2.93 in (1989) |
| September 24 | 88.0°F (1970) | 28.0°F (1974) | 1.44 in (1975) |
| September 25 | 89.1°F (1970) | 28.0°F (1974) | 0.84 in (2001) |
| September 26 | 89.1°F (2007) | 32.0°F (1983) | 1.05 in (1993) |
| September 27 | 88.0°F (2017) | 34.0°F (1989) | 1.20 in (2002) |
| September 28 | 87.1°F (2017) | 30.9°F (1991) | 1.18 in (2007) |
| September 29 | 84.0°F (1971) | 30.9°F (1978) | 1.91 in (1973) |
| September 30 | 88.0°F (1986) | 33.1°F (1978) | 1.44 in (2015) |