September weather in Lake Stevens, WA
The average temperature in Lake Stevens in September is 60.0°F (49.6°F–70.4°F). Average precipitation: 2.34 inches.
September is a fall month in Lake Stevens, and is warmer than the annual average of 52.1°F. Daily temperatures swing about 20.8°F between overnight low and afternoon high. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
70.4°F
Avg Low
49.6°F
Precipitation
2.34 in
Daylight
12h 20m
September records in Lake Stevens
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (2022) | 0.0°F (1997) | 1.74 in (2010) |
| September 2 | 82.9°F (1987) | 39.9°F (1919) | 1.58 in (1971) |
| September 3 | 86.0°F (1988) | 39.9°F (1917) | 1.02 in (2014) |
| September 4 | 84.0°F (1988) | 39.9°F (1918) | 0.86 in (1945) |
| September 5 | 84.9°F (1964) | 34.0°F (1992) | 2.26 in (1931) |
| September 6 | 84.0°F (2024) | 30.9°F (1992) | 1.63 in (1984) |
| September 7 | 89.1°F (1986) | 39.0°F (1947) | 0.80 in (1973) |
| September 8 | 89.1°F (2020) | 35.1°F (1992) | 1.28 in (1951) |
| September 9 | 81.0°F (2012) | 37.0°F (1928) | 1.45 in (1972) |
| September 10 | 88.0°F (1932) | 39.0°F (1921) | 1.02 in (1974) |
| September 11 | 84.0°F (2020) | 37.9°F (1936) | 1.36 in (1919) |
| September 12 | 84.0°F (2013) | 37.9°F (1921) | 0.53 in (1936) |
| September 13 | 82.0°F (2022) | 32.0°F (1970) | 0.64 in (1969) |
| September 14 | 84.9°F (1961) | 33.1°F (1970) | 0.76 in (1936) |
| September 15 | 84.9°F (1979) | 34.0°F (1916) | 2.39 in (1926) |
| September 16 | 82.0°F (1967) | 36.0°F (1936) | 1.35 in (1926) |
| September 17 | 90.0°F (2025) | 37.9°F (1965) | 1.10 in (1964) |
| September 18 | 82.0°F (2025) | 35.1°F (1947) | 1.40 in (1969) |
| September 19 | 82.9°F (1991) | 33.1°F (1957) | 0.92 in (1921) |
| September 20 | 81.0°F (2012) | 35.1°F (1947) | 1.15 in (1923) |
| September 21 | 82.0°F (1974) | 35.1°F (1932) | 1.20 in (1972) |
| September 22 | 86.0°F (1975) | 35.1°F (1932) | 0.86 in (1996) |
| September 23 | 82.0°F (2009) | 32.0°F (1961) | 1.43 in (1972) |
| September 24 | 82.0°F (2011) | 30.0°F (1926) | 0.95 in (1977) |
| September 25 | 81.0°F (1974) | 32.0°F (1926) | 0.60 in (1951) |
| September 26 | 82.0°F (2011) | 33.1°F (1926) | 0.71 in (1894) |
| September 27 | 78.1°F (2022) | 33.1°F (1972) | 1.19 in (1927) |
| September 28 | 79.0°F (1967) | 30.9°F (1919) | 0.85 in (1953) |
| September 29 | 88.0°F (2017) | 32.0°F (1919) | 1.40 in (1944) |
| September 30 | 79.0°F (1992) | 33.1°F (1917) | 1.47 in (1937) |