September weather in St. Maries, ID
The average temperature in St. Maries in September is 59.1°F (43.7°F–74.5°F). Average precipitation: 1.04 inches.
September is a fall month in St. Maries, and is warmer than the annual average of 47.9°F. Daily temperatures swing about 30.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
74.5°F
Avg Low
43.7°F
Precipitation
1.04 in
Daylight
12h 19m
September records in St. Maries
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (2022) | 34.0°F (1930) | 0.52 in (2010) |
| September 2 | 102.9°F (2025) | 32.0°F (1910) | 0.46 in (1943) |
| September 3 | 104.0°F (1988) | 30.0°F (1956) | 1.04 in (1916) |
| September 4 | 102.0°F (1988) | 28.9°F (1956) | 0.59 in (1960) |
| September 5 | 102.9°F (1988) | 28.9°F (1956) | 1.24 in (1940) |
| September 6 | 98.1°F (1973) | 28.9°F (1929) | 0.46 in (1897) |
| September 7 | 98.1°F (1944) | 28.0°F (1929) | 1.03 in (1947) |
| September 8 | 97.0°F (1944) | 28.9°F (1962) | 0.30 in (1916) |
| September 9 | 97.0°F (1944) | 30.0°F (1908) | 0.76 in (1931) |
| September 10 | 97.0°F (1958) | 25.0°F (1921) | 0.95 in (2000) |
| September 11 | 97.0°F (1953) | 28.0°F (1906) | 1.10 in (1927) |
| September 12 | 98.1°F (1944) | 28.9°F (1970) | 1.85 in (2024) |
| September 13 | 97.0°F (1944) | 26.1°F (1970) | 1.04 in (1927) |
| September 14 | 93.9°F (1990) | 25.0°F (1970) | 0.77 in (1968) |
| September 15 | 96.1°F (1979) | 26.1°F (1970) | 0.60 in (1959) |
| September 16 | 93.9°F (1937) | 28.0°F (1965) | 0.68 in (1947) |
| September 17 | 99.0°F (1981) | 21.9°F (1926) | 1.41 in (1985) |
| September 18 | 95.0°F (1938) | 21.0°F (1926) | 1.33 in (1968) |
| September 19 | 97.0°F (1938) | 18.0°F (1926) | 0.51 in (1940) |
| September 20 | 93.0°F (1979) | 26.1°F (1934) | 0.70 in (2017) |
| September 21 | 93.9°F (1939) | 28.0°F (1932) | 1.01 in (2008) |
| September 22 | 96.1°F (1966) | 27.0°F (1946) | 0.73 in (1901) |
| September 23 | 95.0°F (1990) | 25.0°F (1931) | 1.11 in (1900) |
| September 24 | 96.1°F (1990) | 19.0°F (1926) | 1.20 in (1992) |
| September 25 | 97.0°F (2024) | 3.0°F (2000) | 0.57 in (1951) |
| September 26 | 93.9°F (1943) | 24.1°F (1926) | 1.02 in (1947) |
| September 27 | 91.0°F (1967) | 27.0°F (1935) | 0.99 in (1905) |
| September 28 | 93.9°F (1963) | 19.9°F (1935) | 1.22 in (1940) |
| September 29 | 91.9°F (1963) | 21.0°F (1983) | 0.91 in (2013) |
| September 30 | 88.0°F (1946) | 23.0°F (1935) | 0.94 in (1956) |