September weather in Glenns Ferry, ID
The average temperature in Glenns Ferry in September is 66.2°F (46.1°F–86.3°F). Average precipitation: 0.44 inches.
September is a fall month in Glenns Ferry, and is warmer than the annual average of 54.6°F. Daily temperatures swing about 40.2°F between overnight low and afternoon high. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
86.3°F
Avg Low
46.1°F
Precipitation
0.44 in
Daylight
12h 17m
September records in Glenns Ferry
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 109.0°F (2022) | 34.0°F (1905) | 0.19 in (1964) |
| September 2 | 107.1°F (1905) | 36.0°F (1921) | 0.60 in (1909) |
| September 3 | 104.0°F (1950) | 30.0°F (1921) | 0.45 in (2000) |
| September 4 | 108.0°F (2022) | 30.9°F (1921) | 0.05 in (1940) |
| September 5 | 102.9°F (1918) | 33.1°F (1956) | 0.36 in (2016) |
| September 6 | 105.1°F (2020) | 34.0°F (1996) | 0.74 in (1978) |
| September 7 | 109.0°F (2022) | 0.0°F (2021) | 0.30 in (1947) |
| September 8 | 105.1°F (2022) | 25.0°F (1927) | 0.39 in (1985) |
| September 9 | 104.0°F (1905) | 27.0°F (1927) | 0.89 in (1961) |
| September 10 | 102.0°F (1959) | 25.0°F (1921) | 0.25 in (1978) |
| September 11 | 102.0°F (1919) | 23.0°F (1921) | 0.73 in (1980) |
| September 12 | 99.0°F (1913) | 28.0°F (1921) | 0.29 in (1997) |
| September 13 | 100.9°F (1990) | 28.0°F (1914) | 0.11 in (1998) |
| September 14 | 97.0°F (2009) | 26.1°F (1915) | 0.50 in (1918) |
| September 15 | 99.0°F (2000) | 28.9°F (1915) | 0.30 in (2015) |
| September 16 | 100.9°F (1995) | 28.0°F (1921) | 0.23 in (2024) |
| September 17 | 99.0°F (1995) | 26.1°F (1921) | 0.33 in (1993) |
| September 18 | 100.0°F (1962) | 28.0°F (1921) | 0.72 in (1919) |
| September 19 | 98.1°F (1910) | 23.0°F (1965) | 0.59 in (1940) |
| September 20 | 97.0°F (1910) | 27.0°F (1986) | 0.55 in (1982) |
| September 21 | 97.0°F (1979) | 21.9°F (1983) | 0.22 in (1945) |
| September 22 | 105.1°F (1905) | 23.0°F (1983) | 0.45 in (1930) |
| September 23 | 96.1°F (1949) | 25.0°F (1956) | 0.60 in (1954) |
| September 24 | 100.0°F (2001) | 24.1°F (1913) | 0.16 in (1940) |
| September 25 | 97.0°F (2011) | 15.1°F (1926) | 0.22 in (1986) |
| September 26 | 96.1°F (2009) | 19.0°F (1926) | 1.80 in (1923) |
| September 27 | 97.0°F (1963) | 24.1°F (1911) | 0.42 in (1986) |
| September 28 | 97.0°F (1913) | 24.1°F (1986) | 0.25 in (1909) |
| September 29 | 95.0°F (1963) | 19.0°F (1988) | 0.56 in (2014) |
| September 30 | 96.1°F (1963) | 21.9°F (1985) | 0.28 in (1983) |