September weather in Irvine, CA
The average temperature in Irvine in September is 73.9°F (61.1°F–86.8°F). Average precipitation: 0.18 inches.
September is a fall month in Irvine, and is warmer than the annual average of 64.9°F. Daily temperatures swing about 25.7°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
86.8°F
Avg Low
61.1°F
Precipitation
0.18 in
Daylight
12h 12m
September records in Irvine
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 109.9°F (1955) | 42.1°F (1979) | 0.00 in (1902) |
| September 2 | 107.1°F (1955) | 46.9°F (1942) | 0.36 in (1998) |
| September 3 | 105.1°F (1955) | 46.0°F (1925) | 0.04 in (1931) |
| September 4 | 108.0°F (1988) | 43.0°F (1979) | 0.15 in (1963) |
| September 5 | 108.0°F (1984) | 42.1°F (1979) | 0.41 in (1985) |
| September 6 | 106.0°F (1928) | 44.1°F (1942) | 1.32 in (1978) |
| September 7 | 105.1°F (1949) | 42.1°F (1935) | 0.12 in (1908) |
| September 8 | 107.1°F (1984) | 44.1°F (1924) | 0.76 in (1982) |
| September 9 | 105.1°F (1956) | 45.0°F (1924) | 0.05 in (1945) |
| September 10 | 102.0°F (1983) | 46.9°F (1919) | 0.65 in (1976) |
| September 11 | 102.9°F (1963) | 44.1°F (1952) | 1.03 in (1976) |
| September 12 | 108.0°F (1971) | 44.1°F (1952) | 0.27 in (1939) |
| September 13 | 106.0°F (1971) | 43.0°F (1939) | 0.25 in (1923) |
| September 14 | 106.0°F (1979) | 44.1°F (1939) | 0.06 in (1918) |
| September 15 | 102.9°F (1979) | 45.0°F (1956) | 0.80 in (1997) |
| September 16 | 105.1°F (1979) | 46.0°F (1921) | 0.03 in (1920) |
| September 17 | 105.1°F (1922) | 44.1°F (1943) | 0.19 in (1982) |
| September 18 | 107.1°F (1934) | 44.1°F (1954) | 1.13 in (1963) |
| September 19 | 106.0°F (1939) | 42.1°F (1954) | 0.59 in (1989) |
| September 20 | 109.9°F (1939) | 43.0°F (1924) | 0.25 in (1952) |
| September 21 | 109.0°F (1939) | 42.1°F (1926) | 0.19 in (1983) |
| September 22 | 105.1°F (1939) | 41.0°F (1941) | 0.26 in (2000) |
| September 23 | 105.1°F (1997) | 41.0°F (1923) | 0.46 in (1987) |
| September 24 | 107.1°F (1997) | 43.0°F (1921) | 1.00 in (1908) |
| September 25 | 102.9°F (1975) | 44.1°F (1934) | 3.07 in (1939) |
| September 26 | 111.0°F (1963) | 39.0°F (1948) | 0.33 in (1982) |
| September 27 | 109.0°F (1963) | 41.0°F (1924) | 0.39 in (1919) |
| September 28 | 108.0°F (1963) | 42.1°F (1936) | 0.70 in (1967) |
| September 29 | 106.0°F (1999) | 42.1°F (1925) | 0.20 in (1919) |
| September 30 | 102.0°F (1999) | 39.9°F (1926) | 0.60 in (1916) |