September weather in Shasta Lake, CA
The average temperature in Shasta Lake in September is 76.6°F (63.0°F–90.3°F). Average precipitation: 0.52 inches.
September is a fall month in Shasta Lake, and is warmer than the annual average of 63.5°F. Daily temperatures swing about 27.3°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 12h 15m. For travel, September is hot.
Avg High
90.3°F
Avg Low
63.0°F
Precipitation
0.52 in
Daylight
12h 15m
September records in Shasta Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 109.0°F (1987) | 48.0°F (1964) | 1.28 in (2000) |
| September 2 | 108.0°F (1950) | 46.9°F (1999) | 2.01 in (2023) |
| September 3 | 114.1°F (1955) | 53.1°F (1964) | 0.14 in (2000) |
| September 4 | 111.9°F (1988) | 53.1°F (1960) | 0.17 in (2000) |
| September 5 | 111.9°F (1988) | 52.0°F (1952) | 0.20 in (1952) |
| September 6 | 109.9°F (2022) | 50.0°F (1952) | 1.53 in (1978) |
| September 7 | 111.0°F (2022) | 51.1°F (1952) | 0.11 in (2017) |
| September 8 | 109.9°F (2020) | 50.0°F (1952) | 4.18 in (1985) |
| September 9 | 108.0°F (1944) | 48.9°F (1985) | 1.88 in (1985) |
| September 10 | 107.1°F (1944) | 46.0°F (1985) | 3.14 in (1978) |
| September 11 | 106.0°F (1944) | 46.0°F (1985) | 0.45 in (1997) |
| September 12 | 106.0°F (1945) | 50.0°F (1985) | 0.12 in (1976) |
| September 13 | 102.0°F (1945) | 50.0°F (1952) | 0.25 in (1966) |
| September 14 | 102.0°F (1945) | 51.1°F (2016) | 0.24 in (1980) |
| September 15 | 105.1°F (1981) | 50.0°F (1959) | 1.16 in (1997) |
| September 16 | 106.0°F (1979) | 48.9°F (1946) | 0.64 in (1976) |
| September 17 | 100.0°F (1979) | 50.0°F (1977) | 2.10 in (1986) |
| September 18 | 104.0°F (1991) | 48.0°F (1978) | 3.10 in (1959) |
| September 19 | 102.0°F (1991) | 46.0°F (1986) | 4.34 in (1959) |
| September 20 | 102.9°F (1943) | 46.9°F (1986) | 3.24 in (1977) |
| September 21 | 104.0°F (1943) | 48.9°F (2004) | 0.72 in (2013) |
| September 22 | 105.1°F (1943) | 48.9°F (2013) | 0.71 in (2013) |
| September 23 | 105.1°F (1943) | 50.0°F (1948) | 2.00 in (1983) |
| September 24 | 104.0°F (2003) | 46.9°F (1948) | 0.58 in (1986) |
| September 25 | 102.9°F (2003) | 46.9°F (1948) | 2.00 in (2014) |
| September 26 | 102.9°F (1944) | 48.0°F (1981) | 0.54 in (2014) |
| September 27 | 105.1°F (2009) | 46.0°F (1986) | 4.43 in (1957) |
| September 28 | 100.9°F (2016) | 46.0°F (1986) | 1.09 in (1957) |
| September 29 | 99.0°F (2008) | 43.0°F (2019) | 1.54 in (1977) |
| September 30 | 100.9°F (2010) | 43.0°F (1971) | 0.68 in (1971) |