September weather in Island Park, ID
The average temperature in Island Park in September is °F (°F–°F). Average precipitation: 1.80 inches.
September is a fall month in Island Park, and is cooler than the annual average of 0°F. Expect about 6 days with precipitation. Daylight averages about 12h 17m.
Avg High
°F
Avg Low
°F
Precipitation
1.80 in
Daylight
12h 17m
September records in Island Park
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 80.1°F (2022) | 33.8°F (2020) | 1.00 in (2000) |
| September 2 | 81.1°F (2017) | 29.1°F (2008) | 0.30 in (1995) |
| September 3 | 83.5°F (2022) | 33.1°F (1989) | 1.30 in (2023) |
| September 4 | 84.9°F (2006) | 32.5°F (1999) | 1.20 in (1992) |
| September 5 | 82.6°F (1998) | 29.8°F (1996) | 0.50 in (2016) |
| September 6 | 82.2°F (2022) | 26.6°F (1992) | 1.20 in (2002) |
| September 7 | 83.3°F (2022) | 21.7°F (1992) | 0.40 in (2002) |
| September 8 | 79.0°F (1994) | 26.1°F (2020) | 1.60 in (2019) |
| September 9 | 79.7°F (2021) | 30.7°F (2001) | 0.50 in (2010) |
| September 10 | 78.8°F (1996) | 26.6°F (1989) | 0.50 in (2019) |
| September 11 | 79.7°F (1990) | 25.0°F (1988) | 1.10 in (1985) |
| September 12 | 77.7°F (2006) | 24.8°F (1993) | 0.90 in (2017) |
| September 13 | 78.3°F (2006) | 24.1°F (1993) | 0.80 in (2017) |
| September 14 | 83.5°F (1990) | 28.0°F (1993) | 0.40 in (2022) |
| September 15 | 82.9°F (2000) | 30.0°F (1991) | 0.90 in (2015) |
| September 16 | 80.8°F (2000) | 28.8°F (2006) | 2.10 in (2015) |
| September 17 | 78.1°F (2008) | 26.1°F (1996) | 0.90 in (2024) |
| September 18 | 77.0°F (2008) | 23.4°F (1988) | 0.50 in (2017) |
| September 19 | 75.6°F (2008) | 24.3°F (1988) | 0.60 in (2004) |
| September 20 | 69.6°F (2012) | 20.7°F (1995) | 1.10 in (2017) |
| September 21 | 72.1°F (2001) | 19.6°F (1995) | 0.70 in (2022) |
| September 22 | 72.1°F (2012) | 17.8°F (2000) | 0.70 in (2016) |
| September 23 | 74.8°F (1994) | 18.1°F (2000) | 0.70 in (2007) |
| September 24 | 80.8°F (2001) | 22.1°F (2000) | 0.30 in (1986) |
| September 25 | 80.4°F (2001) | 27.1°F (1996) | 0.50 in (1986) |
| September 26 | 74.5°F (1991) | 23.5°F (1999) | 0.50 in (1986) |
| September 27 | 75.7°F (2001) | 22.1°F (1999) | 1.30 in (2014) |
| September 28 | 74.3°F (1994) | 18.9°F (1999) | 0.40 in (2014) |
| September 29 | 73.9°F (2008) | 26.6°F (2019) | 1.00 in (1983) |
| September 30 | 75.4°F (2008) | 25.0°F (2019) | 0.90 in (2017) |