September weather in Star, ID
The average temperature in Star in September is 63.8°F (46.5°F–81.0°F). Average precipitation: 0.36 inches.
September is a fall month in Star, and is warmer than the annual average of 52°F. Daily temperatures swing about 34.5°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
81.0°F
Avg Low
46.5°F
Precipitation
0.36 in
Daylight
12h 17m
September records in Star
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (2004) | 37.9°F (1980) | 0.39 in (1984) |
| September 2 | 99.0°F (1998) | 39.0°F (1989) | 0.15 in (2000) |
| September 3 | 100.9°F (1998) | 35.1°F (1989) | 0.30 in (1997) |
| September 4 | 100.9°F (1998) | 34.0°F (1989) | 0.14 in (1995) |
| September 5 | 100.9°F (1998) | 37.0°F (1980) | 0.12 in (2000) |
| September 6 | 99.0°F (1998) | 37.0°F (1996) | 0.39 in (1978) |
| September 7 | 95.0°F (1988) | 35.1°F (1992) | 0.12 in (1978) |
| September 8 | 96.1°F (1998) | 33.1°F (1992) | 0.26 in (1978) |
| September 9 | 93.0°F (2012) | 35.1°F (1977) | 0.83 in (1986) |
| September 10 | 95.0°F (1997) | 37.0°F (1983) | 0.27 in (1998) |
| September 11 | 93.0°F (1990) | 36.0°F (1979) | 1.69 in (1980) |
| September 12 | 99.0°F (1996) | 35.1°F (1979) | 0.08 in (1997) |
| September 13 | 93.0°F (1996) | 36.0°F (1979) | 0.24 in (2004) |
| September 14 | 93.9°F (2009) | 35.1°F (1992) | 0.63 in (1980) |
| September 15 | 98.1°F (2000) | 37.0°F (1992) | 0.08 in (1997) |
| September 16 | 93.9°F (1995) | 37.9°F (1982) | 0.38 in (1996) |
| September 17 | 93.9°F (1981) | 34.0°F (1987) | 0.17 in (1977) |
| September 18 | 98.1°F (1981) | 35.1°F (1987) | 0.81 in (1989) |
| September 19 | 97.0°F (1981) | 30.0°F (1978) | 0.08 in (1980) |
| September 20 | 91.0°F (2008) | 32.0°F (1978) | 0.16 in (1986) |
| September 21 | 88.0°F (1979) | 28.9°F (1983) | 0.96 in (2008) |
| September 22 | 88.0°F (1979) | 30.0°F (1977) | 0.01 in (1977) |
| September 23 | 93.0°F (1992) | 30.0°F (1977) | 1.00 in (2007) |
| September 24 | 90.0°F (2011) | 30.9°F (1984) | 0.74 in (1977) |
| September 25 | 95.0°F (2011) | 28.0°F (1984) | 0.39 in (1986) |
| September 26 | 90.0°F (2009) | 32.0°F (1984) | 0.61 in (1979) |
| September 27 | 89.1°F (2003) | 35.1°F (1984) | 0.10 in (2014) |
| September 28 | 88.0°F (1991) | 30.0°F (1999) | 0.10 in (2014) |
| September 29 | 89.1°F (2003) | 30.9°F (1999) | 0.56 in (2014) |
| September 30 | 93.0°F (1989) | 34.0°F (1981) | 0.23 in (1977) |