September weather in Soap Lake, WA
The average temperature in Soap Lake in September is 64.5°F (50.6°F–78.5°F). Average precipitation: 0.22 inches.
September is a fall month in Soap Lake, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 27.9°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 19m. For travel, September is one of the best months of the year to visit.
Avg High
78.5°F
Avg Low
50.6°F
Precipitation
0.22 in
Daylight
12h 19m
September records in Soap Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1987) | 41.0°F (1980) | 0.16 in (1981) |
| September 2 | 100.9°F (1950) | 42.1°F (1973) | 0.12 in (1971) |
| September 3 | 106.0°F (1988) | 42.1°F (2016) | 0.11 in (1979) |
| September 4 | 102.0°F (1988) | 39.9°F (2002) | 0.67 in (1960) |
| September 5 | 98.1°F (1955) | 45.0°F (1969) | 0.45 in (1971) |
| September 6 | 98.1°F (2024) | 41.0°F (1996) | 0.19 in (1978) |
| September 7 | 99.0°F (2024) | 37.9°F (1992) | 0.24 in (1995) |
| September 8 | 97.0°F (2011) | 37.9°F (2002) | 0.23 in (1995) |
| September 9 | 98.1°F (2011) | 42.1°F (1970) | 0.10 in (1982) |
| September 10 | 99.0°F (2011) | 44.1°F (2003) | 0.63 in (2021) |
| September 11 | 99.0°F (1953) | 41.0°F (1988) | 0.15 in (1966) |
| September 12 | 97.0°F (2013) | 39.0°F (1984) | 0.19 in (1982) |
| September 13 | 98.1°F (2013) | 36.0°F (1970) | 0.42 in (1980) |
| September 14 | 96.1°F (2000) | 37.9°F (1970) | 0.18 in (1959) |
| September 15 | 93.9°F (1967) | 37.0°F (1970) | 0.40 in (1996) |
| September 16 | 96.1°F (1981) | 37.9°F (1965) | 0.41 in (1986) |
| September 17 | 98.1°F (1981) | 34.0°F (1965) | 0.42 in (1985) |
| September 18 | 99.0°F (1981) | 33.1°F (1988) | 0.52 in (1986) |
| September 19 | 97.0°F (1967) | 33.1°F (1957) | 0.50 in (2010) |
| September 20 | 93.0°F (1967) | 34.0°F (1983) | 0.22 in (1959) |
| September 21 | 93.9°F (1967) | 36.0°F (1996) | 0.04 in (1959) |
| September 22 | 96.1°F (1966) | 35.1°F (1956) | 0.63 in (1984) |
| September 23 | 91.9°F (1987) | 28.0°F (2000) | 0.47 in (1986) |
| September 24 | 91.0°F (1952) | 33.1°F (1958) | 0.19 in (2014) |
| September 25 | 91.9°F (1952) | 34.0°F (1970) | 0.38 in (1998) |
| September 26 | 90.0°F (1952) | 33.1°F (1972) | 0.32 in (1959) |
| September 27 | 93.9°F (1994) | 35.1°F (1972) | 0.33 in (1981) |
| September 28 | 93.9°F (1963) | 35.1°F (1985) | 0.43 in (1982) |
| September 29 | 88.0°F (1989) | 30.0°F (1972) | 0.17 in (1951) |
| September 30 | 86.0°F (2008) | 31.1°F (2019) | 0.27 in (2007) |