September weather in Imperial, CA
The average temperature in Imperial in September is 87.2°F (72.2°F–102.2°F). Average precipitation: 0.18 inches.
September is a fall month in Imperial, and is warmer than the annual average of 73.7°F. Daily temperatures swing about 30°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
102.2°F
Avg Low
72.2°F
Precipitation
0.18 in
Daylight
12h 11m
September records in Imperial
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 116.1°F (1969) | 64.0°F (1966) | 0.52 in (2023) |
| September 2 | 111.9°F (2010) | 60.1°F (2000) | 0.48 in (1967) |
| September 3 | 115.0°F (2010) | 62.1°F (1964) | 0.03 in (2017) |
| September 4 | 114.1°F (2020) | 62.1°F (2004) | 0.13 in (2013) |
| September 5 | 120.9°F (2020) | 62.1°F (2004) | 0.00 in (1962) |
| September 6 | 118.0°F (2020) | 64.0°F (1970) | 0.41 in (1976) |
| September 7 | 113.0°F (2020) | 66.0°F (1965) | 0.20 in (1975) |
| September 8 | 114.1°F (2011) | 61.0°F (1965) | 0.00 in (1962) |
| September 9 | 115.0°F (1968) | 61.0°F (1965) | 1.08 in (2022) |
| September 10 | 113.0°F (1968) | 60.1°F (2010) | 2.22 in (1976) |
| September 11 | 115.0°F (1971) | 64.0°F (2020) | 0.00 in (1962) |
| September 12 | 118.0°F (1971) | 61.0°F (1965) | 0.00 in (1962) |
| September 13 | 113.0°F (1971) | 64.9°F (1972) | 0.09 in (2011) |
| September 14 | 113.0°F (1971) | 63.0°F (1970) | 0.53 in (1969) |
| September 15 | 113.0°F (2000) | 57.9°F (1970) | 0.00 in (1962) |
| September 16 | 109.9°F (1962) | 61.0°F (1970) | 0.00 in (1962) |
| September 17 | 111.9°F (1962) | 57.0°F (2006) | 0.79 in (1963) |
| September 18 | 111.0°F (1962) | 59.0°F (2006) | 0.39 in (2025) |
| September 19 | 111.9°F (1962) | 57.9°F (1965) | 0.00 in (1962) |
| September 20 | 109.0°F (2010) | 54.0°F (1965) | 0.16 in (2016) |
| September 21 | 108.0°F (2003) | 54.0°F (1978) | 0.44 in (2007) |
| September 22 | 111.9°F (1966) | 55.0°F (1978) | 0.03 in (2025) |
| September 23 | 111.0°F (1966) | 55.0°F (1968) | 0.12 in (1976) |
| September 24 | 111.0°F (2002) | 57.0°F (1968) | 0.01 in (1976) |
| September 25 | 109.9°F (1963) | 55.0°F (2017) | 0.44 in (2019) |
| September 26 | 109.9°F (2010) | 54.0°F (1970) | 0.07 in (1974) |
| September 27 | 111.0°F (2009) | 55.0°F (2013) | 0.00 in (1962) |
| September 28 | 109.0°F (1963) | 55.0°F (1971) | 0.00 in (1962) |
| September 29 | 109.9°F (1969) | 55.0°F (1965) | 0.44 in (1971) |
| September 30 | 108.0°F (1969) | 54.0°F (1965) | 0.77 in (2018) |