September weather in Alexandria, VA
The average temperature in Alexandria in September is 72.4°F (64.1°F–80.7°F). Average precipitation: 3.93 inches.
September is a fall month in Alexandria, and is warmer than the annual average of 59.3°F. Daily temperatures swing about 16.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.7°F
Avg Low
64.1°F
Precipitation
3.93 in
Daylight
12h 14m
September records in Alexandria
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1953) | 53.1°F (1946) | 2.82 in (1952) |
| September 2 | 100.9°F (1980) | 51.1°F (1948) | 1.65 in (2000) |
| September 3 | 98.1°F (1953) | 52.0°F (1967) | 1.67 in (1974) |
| September 4 | 98.1°F (2023) | 54.0°F (1997) | 1.83 in (1996) |
| September 5 | 99.0°F (2023) | 53.1°F (1997) | 3.68 in (1979) |
| September 6 | 98.1°F (1954) | 55.0°F (1962) | 3.50 in (2008) |
| September 7 | 99.0°F (1954) | 51.1°F (1988) | 2.89 in (2018) |
| September 8 | 98.1°F (2016) | 52.0°F (1988) | 2.93 in (1969) |
| September 9 | 96.1°F (2016) | 50.0°F (1986) | 1.59 in (2018) |
| September 10 | 98.1°F (1983) | 46.9°F (1956) | 2.88 in (2020) |
| September 11 | 98.1°F (1983) | 48.9°F (1967) | 1.15 in (1996) |
| September 12 | 98.1°F (2019) | 46.9°F (1967) | 2.18 in (1960) |
| September 13 | 93.0°F (1952) | 48.9°F (1941) | 2.30 in (1944) |
| September 14 | 95.0°F (2016) | 46.9°F (1964) | 4.07 in (1966) |
| September 15 | 93.0°F (1998) | 48.9°F (1946) | 1.62 in (1947) |
| September 16 | 96.1°F (1991) | 48.9°F (1966) | 4.76 in (1976) |
| September 17 | 96.1°F (1991) | 46.9°F (1986) | 1.34 in (1945) |
| September 18 | 90.0°F (1970) | 46.0°F (1990) | 2.28 in (2003) |
| September 19 | 93.9°F (1978) | 48.0°F (1943) | 0.85 in (2000) |
| September 20 | 91.0°F (1965) | 46.0°F (2020) | 1.10 in (1989) |
| September 21 | 91.9°F (1965) | 41.0°F (1956) | 2.18 in (1979) |
| September 22 | 95.0°F (1970) | 45.0°F (1962) | 1.53 in (1994) |
| September 23 | 96.1°F (1970) | 44.1°F (1963) | 1.88 in (1975) |
| September 24 | 99.0°F (2010) | 39.0°F (1963) | 1.11 in (1975) |
| September 25 | 93.9°F (1970) | 39.0°F (1963) | 3.46 in (1975) |
| September 26 | 93.0°F (1970) | 46.0°F (1943) | 2.12 in (1975) |
| September 27 | 95.0°F (1998) | 41.0°F (1947) | 3.17 in (1985) |
| September 28 | 89.1°F (1954) | 42.1°F (1947) | 2.46 in (2004) |
| September 29 | 93.0°F (1954) | 42.1°F (1942) | 1.92 in (1963) |
| September 30 | 91.0°F (1954) | 39.9°F (1942) | 4.66 in (2010) |