September weather in Porterville, CA
The average temperature in Porterville in September is 77.3°F (62.3°F–92.3°F). Average precipitation: 0.06 inches.
September is a fall month in Porterville, and is warmer than the annual average of 65.7°F. Daily temperatures swing about 30°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 13m. For travel, September is hot.
Avg High
92.3°F
Avg Low
62.3°F
Precipitation
0.06 in
Daylight
12h 13m
September records in Porterville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (1902) | 48.9°F (1907) | 0.41 in (1964) |
| September 2 | 108.0°F (1988) | 50.0°F (1964) | 0.02 in (1967) |
| September 3 | 109.0°F (1950) | 51.1°F (1964) | 0.04 in (1931) |
| September 4 | 108.0°F (1955) | 45.0°F (1912) | 0.00 in (1902) |
| September 5 | 109.9°F (1932) | 46.9°F (1912) | 1.35 in (1978) |
| September 6 | 106.0°F (1904) | 46.9°F (1911) | 0.98 in (1978) |
| September 7 | 109.9°F (1904) | 48.0°F (1912) | 0.01 in (1950) |
| September 8 | 109.0°F (1904) | 45.0°F (1920) | 0.32 in (1958) |
| September 9 | 107.1°F (1944) | 44.1°F (1920) | 0.06 in (1908) |
| September 10 | 105.1°F (1922) | 44.1°F (1931) | 0.03 in (1976) |
| September 11 | 106.0°F (1922) | 43.0°F (1931) | 0.70 in (1985) |
| September 12 | 105.1°F (1922) | 42.1°F (1928) | 0.41 in (1976) |
| September 13 | 107.1°F (1955) | 46.0°F (1966) | 0.07 in (1910) |
| September 14 | 105.1°F (1929) | 45.0°F (1921) | 0.07 in (1918) |
| September 15 | 105.1°F (1971) | 45.0°F (1966) | 0.03 in (1910) |
| September 16 | 107.1°F (1913) | 46.0°F (1907) | 0.01 in (1927) |
| September 17 | 109.0°F (1913) | 44.1°F (1908) | 0.03 in (1957) |
| September 18 | 111.9°F (1913) | 46.0°F (1907) | 0.38 in (1963) |
| September 19 | 106.0°F (1922) | 44.1°F (1947) | 0.69 in (1967) |
| September 20 | 104.0°F (1939) | 41.0°F (1968) | 0.09 in (1959) |
| September 21 | 108.0°F (1939) | 37.0°F (1968) | 0.03 in (1911) |
| September 22 | 104.0°F (1939) | 39.9°F (1968) | 0.35 in (1983) |
| September 23 | 104.0°F (1949) | 42.1°F (1945) | 0.48 in (1958) |
| September 24 | 104.0°F (1919) | 39.9°F (1923) | 0.92 in (1908) |
| September 25 | 102.9°F (1939) | 39.0°F (1920) | 1.19 in (1904) |
| September 26 | 100.9°F (1956) | 39.0°F (1948) | 0.92 in (1982) |
| September 27 | 106.0°F (1963) | 41.0°F (1948) | 0.23 in (1918) |
| September 28 | 104.0°F (1963) | 41.0°F (1948) | 0.08 in (1905) |
| September 29 | 100.9°F (1921) | 41.0°F (1905) | 0.65 in (1976) |
| September 30 | 102.9°F (1992) | 41.0°F (1911) | 1.55 in (1976) |