September weather in Newport Beach, CA
The average temperature in Newport Beach in September is 69.1°F (64.1°F–74.1°F). Average precipitation: 0.10 inches.
September is a fall month in Newport Beach, and is warmer than the annual average of 62.8°F. Daily temperatures swing about 10°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 12m. For travel, September is one of the best months of the year to visit.
Avg High
74.1°F
Avg Low
64.1°F
Precipitation
0.10 in
Daylight
12h 12m
September records in Newport Beach
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1955) | 55.9°F (1933) | 0.05 in (1967) |
| September 2 | 87.1°F (1998) | 53.1°F (1929) | 0.16 in (1967) |
| September 3 | 91.9°F (1998) | 52.0°F (1929) | 0.01 in (1972) |
| September 4 | 97.0°F (2022) | 50.0°F (1929) | 0.60 in (1963) |
| September 5 | 91.0°F (1988) | 48.0°F (1929) | 0.70 in (1978) |
| September 6 | 95.0°F (2024) | 52.0°F (1942) | 1.30 in (1978) |
| September 7 | 84.9°F (1984) | 48.0°F (1929) | 0.02 in (1933) |
| September 8 | 95.0°F (2022) | 46.9°F (1929) | 0.06 in (1982) |
| September 9 | 95.0°F (2022) | 45.0°F (1929) | 0.16 in (1976) |
| September 10 | 89.1°F (2015) | 51.1°F (1929) | 1.25 in (1976) |
| September 11 | 91.9°F (1959) | 51.1°F (1929) | 0.73 in (1976) |
| September 12 | 89.1°F (1959) | 48.9°F (1929) | 0.18 in (1923) |
| September 13 | 84.9°F (1984) | 52.0°F (1929) | 0.00 in (1921) |
| September 14 | 84.0°F (1983) | 46.9°F (1929) | 0.10 in (1978) |
| September 15 | 90.0°F (1979) | 50.0°F (1929) | 1.03 in (2015) |
| September 16 | 91.9°F (1979) | 53.1°F (1921) | 0.02 in (1982) |
| September 17 | 93.0°F (1929) | 52.0°F (1924) | 1.09 in (1963) |
| September 18 | 89.1°F (1939) | 48.9°F (1933) | 0.31 in (1929) |
| September 19 | 95.0°F (1939) | 50.0°F (1933) | 0.65 in (1989) |
| September 20 | 93.0°F (1939) | 48.9°F (1954) | 0.25 in (1952) |
| September 21 | 100.0°F (1939) | 50.0°F (1933) | 0.03 in (1947) |
| September 22 | 97.0°F (1939) | 52.0°F (1933) | 0.04 in (1934) |
| September 23 | 93.0°F (1939) | 50.0°F (1925) | 0.21 in (1934) |
| September 24 | 91.0°F (1978) | 50.0°F (1921) | 0.55 in (1958) |
| September 25 | 98.1°F (1970) | 50.0°F (1923) | 2.77 in (1939) |
| September 26 | 107.1°F (1963) | 50.0°F (1934) | 0.63 in (1982) |
| September 27 | 97.0°F (1973) | 50.0°F (1939) | 0.02 in (1991) |
| September 28 | 88.0°F (1963) | 48.9°F (1939) | 0.35 in (1951) |
| September 29 | 88.0°F (1924) | 52.0°F (1929) | 0.18 in (1983) |
| September 30 | 93.9°F (1965) | 51.1°F (1931) | 0.51 in (1983) |