September weather in Santa Monica, CA
The average temperature in Santa Monica in September is 65.5°F (60.9°F–70.0°F). Average precipitation: 0.03 inches.
September is a fall month in Santa Monica, and is warmer than the annual average of 60.5°F. Daily temperatures swing about 9.1°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 12h 12m. For travel, September is one of the best months of the year to visit.
Avg High
70.0°F
Avg Low
60.9°F
Precipitation
0.03 in
Daylight
12h 12m
September records in Santa Monica
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (1955) | 44.1°F (1961) | 0.02 in (1967) |
| September 2 | 88.0°F (1955) | 55.0°F (1942) | 0.04 in (1967) |
| September 3 | 88.0°F (1998) | 53.1°F (1942) | 0.03 in (1972) |
| September 4 | 84.9°F (1988) | 55.9°F (1948) | 0.39 in (1963) |
| September 5 | 87.1°F (2004) | 54.0°F (1948) | 0.08 in (1985) |
| September 6 | 84.0°F (2004) | 54.0°F (1946) | 0.12 in (1976) |
| September 7 | 84.0°F (1955) | 54.0°F (1942) | 0.20 in (1976) |
| September 8 | 84.0°F (1949) | 50.0°F (1942) | 0.06 in (1975) |
| September 9 | 84.0°F (1976) | 54.0°F (1946) | 0.06 in (1982) |
| September 10 | 84.9°F (1983) | 50.0°F (1969) | 0.00 in (1937) |
| September 11 | 84.9°F (1939) | 52.0°F (1946) | 0.28 in (1976) |
| September 12 | 84.9°F (1983) | 54.0°F (1952) | 0.05 in (1963) |
| September 13 | 82.9°F (1959) | 55.0°F (1949) | 0.03 in (1987) |
| September 14 | 78.1°F (1937) | 53.1°F (1943) | 0.00 in (1937) |
| September 15 | 84.9°F (1979) | 54.0°F (1946) | 0.23 in (1984) |
| September 16 | 90.0°F (1956) | 54.0°F (1952) | 0.00 in (1937) |
| September 17 | 87.1°F (1979) | 53.1°F (1952) | 0.38 in (1963) |
| September 18 | 87.1°F (1946) | 50.0°F (1943) | 0.04 in (1966) |
| September 19 | 87.1°F (1939) | 55.0°F (1943) | 0.21 in (1963) |
| September 20 | 87.1°F (1939) | 53.1°F (1944) | 0.03 in (1988) |
| September 21 | 93.9°F (1939) | 54.0°F (1944) | 0.00 in (1937) |
| September 22 | 105.1°F (1939) | 50.0°F (1944) | 0.00 in (1937) |
| September 23 | 84.9°F (1968) | 53.1°F (1941) | 0.14 in (1987) |
| September 24 | 91.0°F (1978) | 52.0°F (1943) | 0.71 in (1986) |
| September 25 | 88.0°F (1978) | 48.9°F (1948) | 2.61 in (1939) |
| September 26 | 104.0°F (1963) | 46.0°F (1948) | 0.60 in (1982) |
| September 27 | 93.9°F (1970) | 50.0°F (1955) | 0.01 in (2008) |
| September 28 | 84.9°F (1970) | 52.0°F (1943) | 0.28 in (1967) |
| September 29 | 86.0°F (1970) | 48.9°F (1948) | 0.70 in (1967) |
| September 30 | 84.9°F (1999) | 51.1°F (1948) | 1.00 in (1983) |