September weather in Imperial Beach, CA
The average temperature in Imperial Beach in September is 68.7°F (62.4°F–75.0°F). Average precipitation: 0.14 inches.
September is a fall month in Imperial Beach, and is warmer than the annual average of 62.3°F. Daily temperatures swing about 12.6°F between overnight low and afternoon high. Daylight averages about 12h 11m. For travel, September is one of the best months of the year to visit.
Avg High
75.0°F
Avg Low
62.4°F
Precipitation
0.14 in
Daylight
12h 11m
September records in Imperial Beach
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1967) | 52.0°F (2010) | 0.08 in (1995) |
| September 2 | 99.0°F (2008) | 57.0°F (1964) | 0.00 in (1945) |
| September 3 | 100.9°F (2008) | 54.0°F (1971) | 0.03 in (1976) |
| September 4 | 100.0°F (2008) | 52.0°F (1971) | 1.12 in (1963) |
| September 5 | 99.0°F (2008) | 55.9°F (1971) | 0.00 in (1945) |
| September 6 | 100.0°F (2008) | 55.0°F (1970) | 0.06 in (1972) |
| September 7 | 111.0°F (2008) | 55.9°F (1973) | 0.08 in (1975) |
| September 8 | 125.1°F (2008) | 55.0°F (1965) | 0.15 in (1982) |
| September 9 | 99.0°F (2008) | 51.1°F (2010) | 0.47 in (2022) |
| September 10 | 122.0°F (2009) | 50.0°F (2010) | 1.12 in (1976) |
| September 11 | 125.1°F (2009) | 1.2°F (2009) | 0.02 in (1985) |
| September 12 | 89.1°F (2015) | 54.0°F (1985) | 0.00 in (1945) |
| September 13 | 84.0°F (2015) | 55.0°F (1966) | 0.00 in (1945) |
| September 14 | 84.9°F (2015) | 52.0°F (1966) | 0.00 in (1945) |
| September 15 | 84.0°F (1979) | 52.0°F (2010) | 0.42 in (2015) |
| September 16 | 95.0°F (1979) | 51.1°F (2010) | 0.14 in (1982) |
| September 17 | 84.0°F (1979) | 51.1°F (2010) | 0.58 in (1963) |
| September 18 | 87.1°F (1979) | 48.9°F (2010) | 0.50 in (1963) |
| September 19 | 82.9°F (1979) | 51.1°F (2010) | 0.05 in (1963) |
| September 20 | 91.0°F (2015) | 52.0°F (1970) | 0.48 in (2016) |
| September 21 | 82.0°F (1978) | 52.0°F (2007) | 0.07 in (2016) |
| September 22 | 86.0°F (1978) | 50.0°F (2010) | 0.13 in (1987) |
| September 23 | 107.1°F (1975) | 51.1°F (1970) | 0.10 in (1987) |
| September 24 | 102.9°F (1978) | 51.1°F (2007) | 0.34 in (1958) |
| September 25 | 93.0°F (1978) | 53.1°F (1945) | 1.06 in (1997) |
| September 26 | 108.0°F (1963) | 51.1°F (1945) | 0.03 in (1983) |
| September 27 | 100.0°F (1963) | 48.9°F (2013) | 0.21 in (1982) |
| September 28 | 91.9°F (1970) | 51.1°F (1945) | 0.00 in (1945) |
| September 29 | 84.9°F (1945) | 1.2°F (2011) | 0.05 in (1971) |
| September 30 | 86.0°F (1945) | 48.0°F (2013) | 0.14 in (1983) |