September weather in Grace, ID
The average temperature in Grace in September is 57.2°F (40.9°F–73.4°F). Average precipitation: 1.38 inches.
September is a fall month in Grace, and is warmer than the annual average of 43.8°F. Daily temperatures swing about 32.5°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
73.4°F
Avg Low
40.9°F
Precipitation
1.38 in
Daylight
12h 16m
September records in Grace
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2016) | 30.0°F (2006) | 0.59 in (1970) |
| September 2 | 98.1°F (1917) | 28.9°F (2008) | 1.21 in (1973) |
| September 3 | 93.9°F (2007) | 28.9°F (1964) | 0.48 in (1971) |
| September 4 | 95.0°F (1998) | 27.0°F (1989) | 0.55 in (2023) |
| September 5 | 93.0°F (2020) | 30.0°F (1910) | 1.00 in (1945) |
| September 6 | 93.9°F (2022) | 27.0°F (1996) | 0.63 in (1972) |
| September 7 | 93.9°F (2022) | 28.0°F (1929) | 1.04 in (2002) |
| September 8 | 91.9°F (2022) | 27.0°F (1976) | 1.25 in (1973) |
| September 9 | 89.1°F (1997) | 23.0°F (1962) | 1.01 in (1983) |
| September 10 | 91.0°F (1919) | 27.0°F (1976) | 0.95 in (1998) |
| September 11 | 89.1°F (2001) | 25.0°F (1989) | 0.85 in (1939) |
| September 12 | 90.0°F (1990) | 25.0°F (1951) | 1.19 in (1984) |
| September 13 | 91.9°F (1990) | 24.1°F (1949) | 0.47 in (2016) |
| September 14 | 89.1°F (1918) | 23.0°F (1993) | 0.47 in (2017) |
| September 15 | 97.0°F (2000) | 24.1°F (1912) | 0.60 in (2015) |
| September 16 | 89.1°F (2000) | 21.9°F (1936) | 2.00 in (2015) |
| September 17 | 89.1°F (1995) | 24.1°F (1921) | 1.64 in (1947) |
| September 18 | 88.0°F (2014) | 16.0°F (1965) | 1.00 in (1948) |
| September 19 | 90.0°F (1920) | 23.0°F (1945) | 0.97 in (1961) |
| September 20 | 90.0°F (1918) | 16.0°F (1983) | 0.75 in (2023) |
| September 21 | 89.1°F (1918) | 19.0°F (1983) | 1.06 in (1929) |
| September 22 | 87.1°F (2001) | 19.9°F (1980) | 1.15 in (2016) |
| September 23 | 90.0°F (2001) | 21.9°F (1996) | 0.88 in (1934) |
| September 24 | 91.0°F (2001) | 19.9°F (1926) | 0.77 in (1955) |
| September 25 | 89.1°F (1994) | 10.9°F (1926) | 0.95 in (2013) |
| September 26 | 87.1°F (1994) | 21.9°F (1970) | 1.30 in (1982) |
| September 27 | 87.1°F (2010) | 19.0°F (1996) | 1.13 in (2019) |
| September 28 | 90.0°F (2010) | 21.0°F (1985) | 1.76 in (2019) |
| September 29 | 90.0°F (2010) | 15.1°F (1985) | 0.75 in (2014) |
| September 30 | 88.0°F (2010) | 15.1°F (1985) | 0.80 in (1971) |