September weather in Cle Elum, WA
The average temperature in Cle Elum in September is 57.8°F (42.7°F–72.9°F). Average precipitation: 0.90 inches.
September is a fall month in Cle Elum, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 30.2°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
72.9°F
Avg Low
42.7°F
Precipitation
0.90 in
Daylight
12h 19m
September records in Cle Elum
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1998) | 28.9°F (1914) | 0.55 in (1961) |
| September 2 | 98.1°F (1935) | 28.0°F (1919) | 0.49 in (1971) |
| September 3 | 96.1°F (1988) | 28.0°F (1956) | 0.40 in (1911) |
| September 4 | 99.0°F (2025) | 28.0°F (1918) | 0.50 in (1913) |
| September 5 | 93.0°F (1988) | 28.9°F (1956) | 0.38 in (1946) |
| September 6 | 93.9°F (1944) | 28.0°F (1983) | 0.71 in (2013) |
| September 7 | 98.1°F (1944) | 28.0°F (1913) | 0.74 in (1903) |
| September 8 | 93.9°F (1981) | 28.9°F (1899) | 0.77 in (2010) |
| September 9 | 93.0°F (1981) | 25.0°F (1910) | 0.60 in (2000) |
| September 10 | 93.0°F (2011) | 28.9°F (1970) | 0.60 in (1985) |
| September 11 | 97.0°F (1944) | 26.1°F (1906) | 0.64 in (1956) |
| September 12 | 91.9°F (1908) | 24.1°F (1921) | 0.89 in (1911) |
| September 13 | 91.0°F (1923) | 21.0°F (1970) | 0.30 in (1899) |
| September 14 | 91.0°F (2001) | 23.0°F (1916) | 0.45 in (1906) |
| September 15 | 91.0°F (1938) | 24.1°F (1916) | 0.41 in (1900) |
| September 16 | 93.9°F (1957) | 23.0°F (1983) | 0.62 in (1986) |
| September 17 | 93.9°F (1981) | 26.1°F (1902) | 0.24 in (1968) |
| September 18 | 93.0°F (1981) | 24.1°F (1965) | 0.74 in (1983) |
| September 19 | 93.9°F (1918) | 24.1°F (1926) | 0.53 in (1921) |
| September 20 | 88.0°F (1936) | 25.0°F (1904) | 0.57 in (1909) |
| September 21 | 90.0°F (1939) | 24.1°F (2002) | 0.83 in (1977) |
| September 22 | 89.1°F (1966) | 25.0°F (1919) | 0.64 in (1904) |
| September 23 | 90.0°F (1990) | 23.0°F (2000) | 0.80 in (1900) |
| September 24 | 89.1°F (1914) | 18.0°F (1926) | 0.70 in (2020) |
| September 25 | 90.0°F (1952) | 17.1°F (1926) | 0.40 in (1923) |
| September 26 | 86.0°F (1974) | 12.0°F (1926) | 1.01 in (1948) |
| September 27 | 88.0°F (1994) | 23.0°F (1926) | 0.64 in (1940) |
| September 28 | 87.1°F (1967) | 23.0°F (1916) | 0.30 in (1962) |
| September 29 | 88.0°F (1936) | 16.0°F (1919) | 0.75 in (1909) |
| September 30 | 87.1°F (1991) | 21.9°F (1901) | 0.78 in (1964) |