September weather in Blue Lake, CA
The average temperature in Blue Lake in September is 56.8°F (48.5°F–65.1°F). Average precipitation: 0.85 inches.
September is a fall month in Blue Lake, and is warmer than the annual average of 52.5°F. Daily temperatures swing about 16.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
65.1°F
Avg Low
48.5°F
Precipitation
0.85 in
Daylight
12h 15m
September records in Blue Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.0°F (2017) | 42.1°F (2008) | 0.13 in (2023) |
| September 2 | 96.1°F (2017) | 42.1°F (2008) | 0.10 in (2000) |
| September 3 | 82.9°F (2003) | 41.0°F (2008) | 0.06 in (2023) |
| September 4 | 73.0°F (2024) | 39.0°F (2002) | 0.19 in (2007) |
| September 5 | 78.1°F (2008) | 41.0°F (2010) | 0.03 in (2009) |
| September 6 | 78.1°F (2000) | 39.9°F (1992) | 0.01 in (2004) |
| September 7 | 80.1°F (2020) | 41.0°F (1992) | 0.10 in (2010) |
| September 8 | 73.0°F (1997) | 41.0°F (2002) | 0.51 in (2025) |
| September 9 | 73.9°F (2022) | 42.1°F (2002) | 0.37 in (2003) |
| September 10 | 72.0°F (2014) | 43.0°F (2010) | 0.01 in (2003) |
| September 11 | 78.1°F (2003) | 43.0°F (2012) | 0.06 in (2024) |
| September 12 | 77.0°F (2003) | 43.0°F (2010) | 0.01 in (2002) |
| September 13 | 82.9°F (2000) | 39.9°F (1992) | 0.46 in (2009) |
| September 14 | 72.0°F (2003) | 39.0°F (1992) | 0.27 in (2000) |
| September 15 | 73.0°F (2019) | 42.1°F (2017) | 0.68 in (2019) |
| September 16 | 73.9°F (2009) | 39.0°F (2006) | 0.44 in (2015) |
| September 17 | 75.0°F (2000) | 41.0°F (2003) | 1.17 in (2019) |
| September 18 | 88.0°F (2000) | 39.9°F (2003) | 0.91 in (2010) |
| September 19 | 87.1°F (2000) | 39.9°F (2007) | 0.51 in (2010) |
| September 20 | 80.1°F (1997) | 39.9°F (1993) | 0.61 in (2013) |
| September 21 | 82.0°F (2021) | 37.0°F (1993) | 0.56 in (2013) |
| September 22 | 84.0°F (2003) | 39.0°F (1993) | 0.14 in (2013) |
| September 23 | 82.0°F (2006) | 37.9°F (1993) | 0.33 in (2020) |
| September 24 | 79.0°F (2019) | 37.9°F (2005) | 2.62 in (2014) |
| September 25 | 90.0°F (2016) | 37.0°F (1993) | 1.98 in (2023) |
| September 26 | 79.0°F (1992) | 39.9°F (2013) | 0.12 in (2001) |
| September 27 | 81.0°F (2017) | 41.0°F (1999) | 0.73 in (2021) |
| September 28 | 91.0°F (2020) | 39.9°F (1999) | 0.15 in (2007) |
| September 29 | 77.0°F (1999) | 37.9°F (2007) | 2.04 in (2013) |
| September 30 | 78.1°F (1992) | 37.9°F (2002) | 0.59 in (2007) |