September weather in Signal Hill, CA
The average temperature in Signal Hill in September is 73.1°F (63.9°F–82.4°F). Average precipitation: 0.08 inches.
September is a fall month in Signal Hill, and is warmer than the annual average of 64.9°F. Daily temperatures swing about 18.5°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
82.4°F
Avg Low
63.9°F
Precipitation
0.08 in
Daylight
12h 12m
September records in Signal Hill
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 107.1°F (1955) | 55.9°F (1951) | 0.11 in (1967) |
| September 2 | 106.0°F (1955) | 55.0°F (1964) | 0.00 in (1949) |
| September 3 | 102.9°F (1988) | 55.0°F (1964) | 0.13 in (1972) |
| September 4 | 109.0°F (2022) | 55.0°F (1964) | 0.36 in (1963) |
| September 5 | 108.0°F (1984) | 52.0°F (1962) | 1.02 in (1978) |
| September 6 | 109.0°F (2024) | 55.0°F (1951) | 0.08 in (1965) |
| September 7 | 100.9°F (1949) | 55.0°F (1956) | 0.00 in (1949) |
| September 8 | 106.0°F (2024) | 54.0°F (1964) | 0.11 in (2014) |
| September 9 | 102.9°F (2015) | 53.1°F (1952) | 0.20 in (2022) |
| September 10 | 98.1°F (1983) | 55.9°F (1950) | 1.21 in (1976) |
| September 11 | 104.0°F (1983) | 52.0°F (1952) | 0.17 in (1976) |
| September 12 | 108.0°F (1971) | 52.0°F (1952) | 0.01 in (1959) |
| September 13 | 107.1°F (1971) | 54.0°F (1949) | 0.02 in (1978) |
| September 14 | 104.0°F (2012) | 53.1°F (1949) | 0.00 in (1949) |
| September 15 | 102.9°F (2012) | 55.0°F (1954) | 0.93 in (2015) |
| September 16 | 99.0°F (1958) | 54.0°F (1952) | 0.00 in (1949) |
| September 17 | 97.0°F (1979) | 52.0°F (1952) | 0.84 in (1963) |
| September 18 | 97.0°F (1984) | 54.0°F (1952) | 0.03 in (1965) |
| September 19 | 97.0°F (1984) | 51.1°F (1978) | 0.34 in (1989) |
| September 20 | 100.0°F (2015) | 53.1°F (1978) | 0.32 in (2005) |
| September 21 | 98.1°F (2021) | 52.0°F (1953) | 0.13 in (2007) |
| September 22 | 100.0°F (1975) | 53.1°F (1953) | 0.33 in (2007) |
| September 23 | 106.0°F (1978) | 52.0°F (1953) | 0.18 in (1958) |
| September 24 | 106.0°F (1978) | 54.0°F (1953) | 1.39 in (1986) |
| September 25 | 105.1°F (1963) | 52.0°F (1955) | 0.44 in (1997) |
| September 26 | 109.9°F (1963) | 55.0°F (1949) | 0.11 in (1982) |
| September 27 | 111.0°F (2010) | 51.1°F (1949) | 0.05 in (1967) |
| September 28 | 108.0°F (1963) | 52.0°F (1949) | 0.23 in (1967) |
| September 29 | 104.0°F (1999) | 52.0°F (1965) | 0.37 in (1983) |
| September 30 | 105.1°F (2020) | 50.0°F (1965) | 0.92 in (1983) |