September weather in Mountain Home, ID
The average temperature in Mountain Home in September is 64.9°F (48.0°F–81.9°F). Average precipitation: inches.
September is a fall month in Mountain Home, and is warmer than the annual average of 52.3°F. Daily temperatures swing about 33.9°F between overnight low and afternoon high. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
81.9°F
Avg Low
48.0°F
Precipitation
in
Daylight
12h 17m
September records in Mountain Home
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1916) | 30.0°F (1926) | 1.30 in (1915) |
| September 2 | 102.9°F (1950) | 35.1°F (1951) | 0.23 in (1964) |
| September 3 | 104.0°F (2007) | 32.0°F (1926) | 0.17 in (1995) |
| September 4 | 102.0°F (1955) | 30.0°F (1921) | 0.53 in (1912) |
| September 5 | 107.1°F (1955) | 28.9°F (1910) | 0.58 in (2000) |
| September 6 | 105.1°F (1955) | 32.0°F (1992) | 0.34 in (1978) |
| September 7 | 102.0°F (1955) | 30.9°F (1911) | 0.47 in (1908) |
| September 8 | 98.1°F (1955) | 26.1°F (1927) | 0.31 in (1950) |
| September 9 | 99.0°F (1969) | 28.9°F (1914) | 1.15 in (1991) |
| September 10 | 99.0°F (1953) | 25.0°F (1913) | 0.29 in (1940) |
| September 11 | 100.0°F (1953) | 27.0°F (1916) | 1.68 in (1980) |
| September 12 | 102.0°F (1953) | 28.0°F (1910) | 0.35 in (1967) |
| September 13 | 100.0°F (1953) | 27.0°F (1921) | 0.68 in (1939) |
| September 14 | 102.0°F (2000) | 24.1°F (1915) | 0.48 in (1918) |
| September 15 | 100.0°F (1953) | 24.1°F (1927) | 0.62 in (1914) |
| September 16 | 97.0°F (1956) | 24.1°F (1921) | 0.21 in (1976) |
| September 17 | 98.1°F (1956) | 26.1°F (1912) | 0.62 in (1919) |
| September 18 | 98.1°F (1981) | 23.0°F (1911) | 0.59 in (1989) |
| September 19 | 97.0°F (1952) | 25.0°F (1911) | 0.60 in (1940) |
| September 20 | 93.9°F (1906) | 27.0°F (1947) | 0.83 in (1982) |
| September 21 | 95.0°F (1936) | 25.0°F (1926) | 0.47 in (1984) |
| September 22 | 95.0°F (1906) | 24.1°F (1926) | 0.41 in (1930) |
| September 23 | 98.1°F (2001) | 25.0°F (1929) | 1.11 in (1917) |
| September 24 | 99.0°F (2001) | 18.0°F (1926) | 0.13 in (1933) |
| September 25 | 96.1°F (1952) | 9.0°F (1926) | 0.50 in (1973) |
| September 26 | 98.1°F (1952) | 12.9°F (1926) | 1.25 in (1923) |
| September 27 | 93.0°F (1952) | 19.9°F (1908) | 0.40 in (1986) |
| September 28 | 93.0°F (1952) | 21.9°F (1929) | 0.35 in (1927) |
| September 29 | 93.9°F (1906) | 21.9°F (1922) | 0.30 in (1962) |
| September 30 | 93.9°F (1992) | 24.1°F (1921) | 0.96 in (1983) |