September weather in Twin Falls, ID
The average temperature in Twin Falls in September is 63.7°F (47.4°F–79.9°F). Average precipitation: 0.33 inches.
September is a fall month in Twin Falls, and is warmer than the annual average of 51.6°F. Daily temperatures swing about 32.5°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
79.9°F
Avg Low
47.4°F
Precipitation
0.33 in
Daylight
12h 16m
September records in Twin Falls
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2004) | 41.0°F (1989) | 0.12 in (2000) |
| September 2 | 98.1°F (1987) | 35.1°F (2008) | 0.23 in (2000) |
| September 3 | 102.9°F (2007) | 41.0°F (1981) | 0.06 in (1997) |
| September 4 | 96.1°F (1998) | 37.0°F (1989) | 0.13 in (1992) |
| September 5 | 93.0°F (1998) | 39.9°F (1980) | 0.02 in (1990) |
| September 6 | 93.0°F (1980) | 37.9°F (1996) | 0.15 in (1997) |
| September 7 | 91.0°F (1994) | 33.1°F (1992) | 0.07 in (2002) |
| September 8 | 93.9°F (2005) | 37.0°F (1999) | 0.29 in (1980) |
| September 9 | 93.0°F (1990) | 34.0°F (2001) | 0.71 in (1985) |
| September 10 | 93.0°F (1997) | 35.1°F (1983) | 0.40 in (1985) |
| September 11 | 95.0°F (2001) | 33.1°F (1983) | 0.44 in (1991) |
| September 12 | 93.0°F (1990) | 33.1°F (1988) | 0.70 in (1997) |
| September 13 | 93.0°F (2007) | 34.0°F (1985) | 0.25 in (2001) |
| September 14 | 91.9°F (2002) | 32.0°F (2003) | 0.55 in (1980) |
| September 15 | 99.0°F (1990) | 36.0°F (1991) | 0.13 in (1986) |
| September 16 | 90.0°F (2000) | 37.9°F (1986) | 0.04 in (1996) |
| September 17 | 93.0°F (1989) | 28.9°F (1987) | 0.10 in (1989) |
| September 18 | 91.9°F (1981) | 30.0°F (1987) | 0.00 in (1980) |
| September 19 | 93.0°F (1981) | 30.9°F (1988) | 0.06 in (1980) |
| September 20 | 93.0°F (1984) | 30.9°F (1985) | 0.59 in (1988) |
| September 21 | 89.1°F (1991) | 27.0°F (1983) | 0.09 in (1984) |
| September 22 | 89.1°F (1999) | 27.0°F (1983) | 0.02 in (1997) |
| September 23 | 93.0°F (2001) | 30.0°F (1996) | 0.03 in (2007) |
| September 24 | 93.9°F (2001) | 28.9°F (2000) | 0.01 in (1993) |
| September 25 | 91.0°F (2001) | 28.9°F (1984) | 0.29 in (1998) |
| September 26 | 89.1°F (1989) | 28.9°F (1984) | 0.64 in (1982) |
| September 27 | 89.1°F (2001) | 28.9°F (1987) | 0.45 in (1983) |
| September 28 | 93.0°F (2009) | 27.0°F (1987) | 0.05 in (1989) |
| September 29 | 91.0°F (2008) | 26.1°F (1985) | 0.12 in (1983) |
| September 30 | 93.9°F (2010) | 24.1°F (1985) | 0.52 in (1994) |