September weather in San Fernando, CA
The average temperature in San Fernando in September is °F (°F–°F). Average precipitation: 0.12 inches.
September is a fall month in San Fernando, and is cooler than the annual average of 0°F. Expect about 1 days with precipitation. Daylight averages about 12h 12m.
Avg High
°F
Avg Low
°F
Precipitation
0.12 in
Daylight
12h 12m
September records in San Fernando
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (2025) | 57.9°F (2024) | 0.22 in (2023) |
| September 2 | 100.0°F (2024) | 62.1°F (2024) | 1.09 in (1967) |
| September 3 | 102.9°F (2024) | 64.9°F (2023) | 0.06 in (1995) |
| September 4 | 104.0°F (2024) | 64.9°F (2023) | 0.31 in (1963) |
| September 5 | 107.1°F (2024) | 55.0°F (2023) | 0.14 in (1965) |
| September 6 | 114.1°F (2024) | 59.0°F (2023) | 0.81 in (1965) |
| September 7 | 115.0°F (2024) | 60.1°F (2023) | 0.07 in (1978) |
| September 8 | 109.9°F (2024) | 61.0°F (2023) | 0.03 in (1950) |
| September 9 | 111.0°F (2024) | 59.0°F (2023) | 0.15 in (2022) |
| September 10 | 109.9°F (2024) | 60.1°F (2025) | 0.76 in (1976) |
| September 11 | 105.1°F (2024) | 61.0°F (2025) | 2.21 in (1976) |
| September 12 | 96.1°F (2024) | 59.0°F (2025) | 0.32 in (1984) |
| September 13 | 98.1°F (2023) | 57.9°F (2025) | 0.06 in (1959) |
| September 14 | 91.9°F (2023) | 60.1°F (2024) | 0.07 in (1978) |
| September 15 | 88.0°F (2025) | 57.9°F (2023) | 0.94 in (2015) |
| September 16 | 95.0°F (2025) | 55.9°F (2024) | 0.15 in (1976) |
| September 17 | 99.0°F (2025) | 52.0°F (2024) | 0.93 in (1950) |
| September 18 | 100.0°F (2025) | 52.0°F (2024) | 0.70 in (1965) |
| September 19 | 80.1°F (2024) | 57.0°F (2023) | 0.63 in (1989) |
| September 20 | 86.0°F (2025) | 55.9°F (2023) | 0.09 in (1952) |
| September 21 | 84.9°F (2025) | 57.9°F (2024) | 0.08 in (1988) |
| September 22 | 84.0°F (2025) | 54.0°F (2023) | 0.98 in (2007) |
| September 23 | 91.9°F (2024) | 57.0°F (2023) | 0.55 in (1958) |
| September 24 | 100.9°F (2024) | 55.9°F (2023) | 0.14 in (1958) |
| September 25 | 97.0°F (2024) | 55.9°F (2023) | 1.00 in (1986) |
| September 26 | 90.0°F (2024) | 55.0°F (2023) | 0.76 in (1982) |
| September 27 | 93.9°F (2023) | 57.9°F (2023) | 0.28 in (1982) |
| September 28 | 96.1°F (2023) | 55.9°F (2023) | 0.13 in (1967) |
| September 29 | 91.9°F (2023) | 53.1°F (2023) | 0.20 in (1983) |
| September 30 | 95.0°F (2024) | 55.9°F (2023) | 1.62 in (1983) |