September weather in St. George, AK
The average temperature in St. George in September is 46.0°F (42.4°F–49.6°F). Average precipitation: 2.53 inches.
September is a fall month in St. George, and is warmer than the annual average of 36.7°F. Daily temperatures swing about 7.2°F between overnight low and afternoon high. Expect about 20 days with precipitation. Daylight averages about 12h 27m. For travel, September is cool.
Avg High
49.6°F
Avg Low
42.4°F
Precipitation
2.53 in
Daylight
12h 27m
September records in St. George
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 57.9°F (2016) | 37.9°F (2002) | 0.93 in (2013) |
| September 2 | 57.0°F (2016) | 37.0°F (2002) | 0.66 in (2012) |
| September 3 | 59.0°F (2016) | 35.1°F (2022) | 0.48 in (2002) |
| September 4 | 55.9°F (2014) | 39.9°F (2003) | 0.27 in (2005) |
| September 5 | 57.0°F (2016) | 37.0°F (2003) | 1.45 in (2025) |
| September 6 | 55.0°F (2018) | 37.0°F (2003) | 0.81 in (2020) |
| September 7 | 55.9°F (2014) | 34.0°F (2012) | 0.30 in (2015) |
| September 8 | 55.9°F (2021) | 31.1°F (2012) | 0.58 in (2000) |
| September 9 | 55.9°F (2014) | 35.1°F (2011) | 0.19 in (2012) |
| September 10 | 57.0°F (2024) | 37.9°F (2013) | 0.48 in (2016) |
| September 11 | 57.0°F (2018) | 37.0°F (2025) | 0.62 in (2001) |
| September 12 | 57.0°F (2018) | 33.1°F (2000) | 0.43 in (2010) |
| September 13 | 57.0°F (2003) | 33.1°F (2000) | 0.98 in (2015) |
| September 14 | 55.9°F (2003) | 30.9°F (2000) | 0.57 in (2020) |
| September 15 | 54.0°F (2003) | 37.0°F (2008) | 0.84 in (2017) |
| September 16 | 55.0°F (2003) | 30.2°F (2012) | 0.37 in (2019) |
| September 17 | 54.0°F (2003) | 30.9°F (2001) | 0.61 in (2012) |
| September 18 | 53.1°F (2010) | 33.1°F (2012) | 0.30 in (1998) |
| September 19 | 53.1°F (2003) | 32.0°F (2012) | 0.36 in (2001) |
| September 20 | 52.0°F (2016) | 30.2°F (2012) | 0.81 in (2013) |
| September 21 | 52.0°F (2010) | 27.1°F (2012) | 0.34 in (2005) |
| September 22 | 53.1°F (2014) | 31.1°F (2012) | 0.47 in (1998) |
| September 23 | 53.1°F (2014) | 30.2°F (2012) | 0.15 in (2001) |
| September 24 | 54.0°F (2014) | 32.0°F (2000) | 1.05 in (2012) |
| September 25 | 51.1°F (2014) | 27.1°F (2009) | 0.40 in (2014) |
| September 26 | 53.1°F (2015) | 28.2°F (2011) | 0.64 in (2013) |
| September 27 | 54.0°F (2003) | 28.0°F (1998) | 0.72 in (2022) |
| September 28 | 52.0°F (2016) | 32.0°F (2011) | 0.50 in (2004) |
| September 29 | 52.0°F (2018) | 30.2°F (2012) | 0.42 in (2018) |
| September 30 | 52.0°F (2016) | 33.1°F (2005) | 0.32 in (2018) |