September weather in Altoona, PA
The average temperature in Altoona in September is 62.9°F (53.2°F–72.6°F). Average precipitation: 4.33 inches.
September is a fall month in Altoona, and is warmer than the annual average of 49.6°F. Daily temperatures swing about 19.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
72.6°F
Avg Low
53.2°F
Precipitation
4.33 in
Daylight
12h 15m
September records in Altoona
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1973) | 45.0°F (1970) | 3.25 in (2021) |
| September 2 | 93.9°F (1973) | 42.1°F (1970) | 1.97 in (2006) |
| September 3 | 93.0°F (1973) | 39.9°F (1976) | 1.10 in (2003) |
| September 4 | 89.1°F (1973) | 41.0°F (1997) | 1.49 in (1988) |
| September 5 | 89.1°F (1973) | 39.0°F (1974) | 0.70 in (2011) |
| September 6 | 88.0°F (1985) | 37.9°F (1976) | 1.76 in (2011) |
| September 7 | 89.1°F (2010) | 39.9°F (1976) | 3.25 in (1996) |
| September 8 | 90.0°F (2015) | 39.0°F (1986) | 3.83 in (2004) |
| September 9 | 88.0°F (2015) | 41.0°F (2017) | 4.15 in (2018) |
| September 10 | 90.0°F (2013) | 37.9°F (1975) | 1.92 in (2018) |
| September 11 | 91.9°F (2002) | 39.0°F (1969) | 1.13 in (1997) |
| September 12 | 89.1°F (1983) | 39.9°F (1977) | 1.64 in (2008) |
| September 13 | 86.0°F (2005) | 37.9°F (1985) | 1.85 in (1971) |
| September 14 | 86.0°F (1998) | 34.0°F (1975) | 2.57 in (1972) |
| September 15 | 84.9°F (2005) | 35.1°F (1975) | 1.03 in (1990) |
| September 16 | 87.1°F (1970) | 39.0°F (2011) | 1.20 in (1981) |
| September 17 | 90.0°F (1991) | 34.0°F (1986) | 3.73 in (2004) |
| September 18 | 87.1°F (1970) | 37.0°F (1986) | 1.73 in (2012) |
| September 19 | 86.0°F (2015) | 36.0°F (2020) | 1.35 in (2003) |
| September 20 | 84.9°F (1983) | 34.0°F (1979) | 0.94 in (1971) |
| September 21 | 84.9°F (1983) | 37.0°F (1969) | 0.71 in (2001) |
| September 22 | 87.1°F (2005) | 36.0°F (2020) | 1.75 in (2021) |
| September 23 | 90.0°F (1970) | 30.9°F (1974) | 0.95 in (2002) |
| September 24 | 88.0°F (1970) | 26.1°F (1974) | 0.64 in (1975) |
| September 25 | 89.1°F (1970) | 32.0°F (1974) | 1.68 in (1975) |
| September 26 | 87.1°F (1970) | 37.0°F (1978) | 2.00 in (1977) |
| September 27 | 84.9°F (2017) | 35.1°F (1980) | 1.78 in (2003) |
| September 28 | 84.9°F (1998) | 33.1°F (1991) | 1.10 in (2004) |
| September 29 | 79.0°F (1987) | 30.0°F (1978) | 2.35 in (1997) |
| September 30 | 81.0°F (1986) | 36.0°F (1969) | 2.87 in (2010) |