September weather in Donaldsonville, LA
The average temperature in Donaldsonville in September is 78.3°F (69.1°F–87.6°F). Average precipitation: 5.39 inches.
September is a fall month in Donaldsonville, and is warmer than the annual average of 68.2°F. Daily temperatures swing about 18.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 10m. For travel, September is a wet month.
Avg High
87.6°F
Avg Low
69.1°F
Precipitation
5.39 in
Daylight
12h 10m
September records in Donaldsonville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (2000) | 59.0°F (1915) | 4.76 in (1962) |
| September 2 | 98.1°F (1907) | 57.9°F (1915) | 3.30 in (2008) |
| September 3 | 99.0°F (1951) | 57.9°F (1967) | 6.07 in (2011) |
| September 4 | 100.0°F (2000) | 48.9°F (1952) | 3.50 in (1948) |
| September 5 | 100.0°F (1932) | 51.1°F (1952) | 3.04 in (1955) |
| September 6 | 100.0°F (1912) | 55.9°F (1953) | 4.00 in (1977) |
| September 7 | 98.1°F (1907) | 55.9°F (1953) | 7.74 in (1893) |
| September 8 | 99.0°F (1931) | 55.9°F (1950) | 2.86 in (2021) |
| September 9 | 100.0°F (1905) | 55.9°F (2011) | 2.00 in (1960) |
| September 10 | 100.0°F (1905) | 55.9°F (2011) | 6.00 in (1965) |
| September 11 | 100.0°F (1905) | 55.9°F (1952) | 3.52 in (1994) |
| September 12 | 99.0°F (1934) | 53.1°F (1940) | 7.98 in (1998) |
| September 13 | 98.1°F (1905) | 51.1°F (1940) | 3.06 in (1973) |
| September 14 | 99.0°F (1905) | 50.0°F (1902) | 2.10 in (1948) |
| September 15 | 100.0°F (1905) | 52.0°F (1902) | 5.84 in (2021) |
| September 16 | 100.9°F (1900) | 55.0°F (1961) | 4.00 in (1971) |
| September 17 | 102.9°F (1927) | 55.0°F (1961) | 4.40 in (1942) |
| September 18 | 102.9°F (1927) | 50.0°F (1901) | 2.20 in (1943) |
| September 19 | 99.0°F (1904) | 50.0°F (1901) | 4.68 in (1943) |
| September 20 | 98.1°F (1933) | 54.0°F (1981) | 6.25 in (1898) |
| September 21 | 99.0°F (1904) | 48.0°F (1918) | 4.10 in (1909) |
| September 22 | 98.1°F (1934) | 48.9°F (1983) | 5.83 in (1920) |
| September 23 | 99.0°F (1904) | 48.9°F (1999) | 1.75 in (1958) |
| September 24 | 97.0°F (1936) | 48.9°F (1927) | 3.50 in (2005) |
| September 25 | 99.0°F (1905) | 51.1°F (1999) | 1.63 in (1946) |
| September 26 | 98.1°F (1905) | 51.1°F (1899) | 3.34 in (2002) |
| September 27 | 98.1°F (1904) | 48.0°F (2000) | 0.98 in (1957) |
| September 28 | 96.1°F (1920) | 43.0°F (1909) | 1.60 in (1905) |
| September 29 | 97.0°F (1915) | 46.0°F (1967) | 2.97 in (1905) |
| September 30 | 97.0°F (1900) | 45.0°F (1967) | 4.56 in (1915) |