September weather in South Lake Tahoe, CA
The average temperature in South Lake Tahoe in September is 54.4°F (35.4°F–73.4°F). Average precipitation: 0.28 inches.
September is a fall month in South Lake Tahoe, and is warmer than the annual average of 44.2°F. Daily temperatures swing about 38°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 12h 14m. For travel, September is cool.
Avg High
73.4°F
Avg Low
35.4°F
Precipitation
0.28 in
Daylight
12h 14m
September records in South Lake Tahoe
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (1988) | 27.0°F (1999) | 0.89 in (2023) |
| September 2 | 89.1°F (1988) | 26.1°F (1973) | 0.19 in (2025) |
| September 3 | 89.1°F (2020) | 28.0°F (1994) | 0.15 in (2023) |
| September 4 | 93.9°F (1988) | 28.9°F (1999) | 0.00 in (2001) |
| September 5 | 93.9°F (1988) | 30.0°F (1995) | 0.10 in (2012) |
| September 6 | 93.0°F (2022) | 24.1°F (2000) | 0.23 in (2022) |
| September 7 | 90.0°F (1988) | 27.0°F (2002) | 0.00 in (2001) |
| September 8 | 90.0°F (1988) | 25.0°F (1978) | 0.09 in (2017) |
| September 9 | 88.0°F (1988) | 28.9°F (1979) | 0.00 in (2001) |
| September 10 | 87.1°F (2015) | 28.0°F (1986) | 0.10 in (2021) |
| September 11 | 88.0°F (1990) | 23.0°F (2005) | 0.19 in (2017) |
| September 12 | 88.0°F (1990) | 21.9°F (1972) | 0.16 in (2011) |
| September 13 | 84.9°F (1990) | 24.1°F (1985) | 0.03 in (2015) |
| September 14 | 88.0°F (1990) | 21.9°F (1970) | 0.04 in (2006) |
| September 15 | 84.9°F (1981) | 26.1°F (1970) | 0.03 in (2015) |
| September 16 | 84.9°F (1981) | 21.9°F (2006) | 0.02 in (2019) |
| September 17 | 82.0°F (1995) | 25.0°F (1996) | 0.00 in (2001) |
| September 18 | 84.9°F (2009) | 24.1°F (1986) | 0.57 in (2024) |
| September 19 | 82.0°F (1991) | 21.9°F (1978) | 0.43 in (2022) |
| September 20 | 84.0°F (2000) | 19.9°F (1978) | 0.31 in (2017) |
| September 21 | 84.0°F (2000) | 21.9°F (1986) | 0.29 in (2022) |
| September 22 | 82.9°F (2011) | 24.1°F (1980) | 0.16 in (2007) |
| September 23 | 82.9°F (2009) | 23.0°F (1972) | 0.00 in (2001) |
| September 24 | 84.0°F (2009) | 23.0°F (1993) | 0.00 in (2001) |
| September 25 | 84.0°F (2009) | 19.0°F (1984) | 0.32 in (2001) |
| September 26 | 84.9°F (2009) | 24.1°F (1970) | 0.80 in (2014) |
| September 27 | 84.9°F (2009) | 23.0°F (1971) | 0.62 in (2014) |
| September 28 | 82.9°F (2010) | 24.1°F (1986) | 0.21 in (2014) |
| September 29 | 84.9°F (2010) | 24.1°F (1986) | 0.04 in (2007) |
| September 30 | 84.9°F (2010) | 26.1°F (1980) | 0.16 in (2023) |