September weather in Tustin, CA
The average temperature in Tustin in September is 73.8°F (63.9°F–83.8°F). Average precipitation: 0.12 inches.
September is a fall month in Tustin, and is warmer than the annual average of 66.1°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
83.8°F
Avg Low
63.9°F
Precipitation
0.12 in
Daylight
12h 12m
September records in Tustin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (1955) | 46.0°F (1941) | 0.00 in (1916) |
| September 2 | 106.0°F (1955) | 46.9°F (1942) | 0.06 in (2023) |
| September 3 | 105.1°F (2007) | 39.9°F (1923) | 0.05 in (1972) |
| September 4 | 108.0°F (1988) | 45.0°F (1942) | 0.41 in (1963) |
| September 5 | 109.9°F (2020) | 46.0°F (1918) | 0.99 in (1978) |
| September 6 | 113.0°F (2024) | 45.0°F (1933) | 0.73 in (1978) |
| September 7 | 105.1°F (1949) | 51.1°F (1918) | 0.00 in (1916) |
| September 8 | 106.0°F (2024) | 45.0°F (1935) | 0.26 in (1982) |
| September 9 | 102.9°F (1956) | 39.9°F (1917) | 0.23 in (2015) |
| September 10 | 100.0°F (1948) | 46.0°F (1933) | 1.41 in (1976) |
| September 11 | 102.0°F (1943) | 46.0°F (1920) | 0.73 in (1976) |
| September 12 | 105.1°F (1971) | 45.0°F (1952) | 0.12 in (1939) |
| September 13 | 102.9°F (1971) | 45.0°F (1949) | 0.05 in (1923) |
| September 14 | 100.9°F (2012) | 44.1°F (1939) | 0.13 in (1918) |
| September 15 | 102.0°F (1979) | 46.0°F (1939) | 0.97 in (2015) |
| September 16 | 100.9°F (1979) | 46.9°F (1952) | 0.42 in (1929) |
| September 17 | 102.9°F (1922) | 45.0°F (1952) | 0.98 in (1963) |
| September 18 | 106.0°F (1922) | 43.0°F (1933) | 0.35 in (1963) |
| September 19 | 108.0°F (1939) | 46.0°F (1925) | 0.39 in (1989) |
| September 20 | 109.0°F (1939) | 45.0°F (1942) | 0.35 in (2005) |
| September 21 | 111.0°F (1939) | 43.0°F (1944) | 0.05 in (1988) |
| September 22 | 111.0°F (1939) | 43.0°F (1941) | 0.52 in (2007) |
| September 23 | 106.0°F (1939) | 41.0°F (1918) | 0.16 in (1934) |
| September 24 | 104.0°F (1978) | 42.1°F (1941) | 0.50 in (1986) |
| September 25 | 102.9°F (1963) | 42.1°F (1944) | 2.81 in (1939) |
| September 26 | 109.9°F (1963) | 39.9°F (1948) | 0.86 in (1939) |
| September 27 | 111.0°F (2010) | 41.0°F (1948) | 0.48 in (1919) |
| September 28 | 107.1°F (1963) | 41.0°F (1920) | 0.28 in (1951) |
| September 29 | 100.0°F (1963) | 43.0°F (1934) | 0.45 in (1919) |
| September 30 | 104.0°F (2020) | 43.0°F (1948) | 0.88 in (1919) |