September weather in Casa Grande, AZ
The average temperature in Casa Grande in September is 85.5°F (70.7°F–100.4°F). Average precipitation: 0.72 inches.
September is a fall month in Casa Grande, and is warmer than the annual average of 72.4°F. Daily temperatures swing about 29.7°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
100.4°F
Avg Low
70.7°F
Precipitation
0.72 in
Daylight
12h 11m
September records in Casa Grande
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 114.1°F (1950) | 59.0°F (1980) | 0.80 in (1935) |
| September 2 | 116.1°F (1950) | 57.9°F (1955) | 0.58 in (1971) |
| September 3 | 113.0°F (1947) | 52.0°F (1912) | 0.67 in (2006) |
| September 4 | 114.1°F (2020) | 51.1°F (1921) | 0.84 in (1970) |
| September 5 | 115.0°F (1947) | 48.0°F (1912) | 1.18 in (1967) |
| September 6 | 113.0°F (2020) | 50.0°F (1912) | 1.05 in (1964) |
| September 7 | 111.9°F (1948) | 48.0°F (1912) | 0.92 in (1926) |
| September 8 | 111.9°F (1910) | 45.0°F (1912) | 2.59 in (1919) |
| September 9 | 114.1°F (1907) | 46.0°F (1912) | 1.50 in (1908) |
| September 10 | 113.0°F (1907) | 55.9°F (1925) | 1.10 in (1933) |
| September 11 | 114.1°F (1932) | 54.0°F (1986) | 0.71 in (2002) |
| September 12 | 111.0°F (1907) | 50.0°F (1985) | 2.00 in (1993) |
| September 13 | 113.0°F (1907) | 53.1°F (1985) | 0.73 in (1961) |
| September 14 | 109.9°F (1905) | 53.1°F (1930) | 0.70 in (1949) |
| September 15 | 111.9°F (1905) | 54.0°F (1930) | 0.59 in (1969) |
| September 16 | 111.9°F (1932) | 55.0°F (1903) | 0.25 in (1907) |
| September 17 | 111.0°F (1932) | 55.9°F (1921) | 0.59 in (1990) |
| September 18 | 111.9°F (1980) | 55.9°F (1976) | 2.92 in (1946) |
| September 19 | 111.9°F (1932) | 54.0°F (1986) | 1.91 in (1946) |
| September 20 | 111.9°F (1910) | 46.9°F (1955) | 1.25 in (1933) |
| September 21 | 109.9°F (1910) | 48.0°F (1965) | 0.79 in (1952) |
| September 22 | 108.0°F (1906) | 50.0°F (1965) | 0.39 in (1950) |
| September 23 | 111.0°F (1906) | 45.0°F (1941) | 0.92 in (1987) |
| September 24 | 113.0°F (1907) | 46.9°F (1941) | 1.59 in (1976) |
| September 25 | 111.9°F (1907) | 48.9°F (1934) | 0.42 in (1943) |
| September 26 | 111.9°F (1910) | 46.9°F (1908) | 1.55 in (1926) |
| September 27 | 111.9°F (2024) | 42.1°F (1908) | 0.59 in (1977) |
| September 28 | 111.9°F (2024) | 43.0°F (1908) | 1.40 in (1941) |
| September 29 | 113.0°F (1910) | 39.9°F (1982) | 1.17 in (1983) |
| September 30 | 108.0°F (1980) | 39.9°F (1908) | 1.00 in (1990) |