September weather in Tukwila, WA
The average temperature in Tukwila in September is 62.6°F (53.6°F–71.6°F). Average precipitation: 1.61 inches.
September is a fall month in Tukwila, and is warmer than the annual average of 53.7°F. Daily temperatures swing about 18°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 19m. For travel, September is one of the best months of the year to visit.
Avg High
71.6°F
Avg Low
53.6°F
Precipitation
1.61 in
Daylight
12h 19m
September records in Tukwila
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1987) | 46.0°F (1973) | 0.55 in (1978) |
| September 2 | 98.1°F (1988) | 41.0°F (1960) | 0.71 in (1979) |
| September 3 | 91.9°F (1988) | 45.0°F (1956) | 0.46 in (2007) |
| September 4 | 88.0°F (2017) | 42.1°F (1952) | 0.66 in (2007) |
| September 5 | 90.0°F (2024) | 44.1°F (1950) | 1.09 in (2013) |
| September 6 | 90.0°F (2014) | 45.0°F (1948) | 0.93 in (2009) |
| September 7 | 93.9°F (1981) | 45.0°F (1960) | 0.59 in (2019) |
| September 8 | 84.9°F (1993) | 43.0°F (1950) | 0.60 in (1979) |
| September 9 | 89.1°F (1963) | 39.9°F (1952) | 0.61 in (1982) |
| September 10 | 91.9°F (2022) | 39.0°F (1952) | 0.64 in (2004) |
| September 11 | 93.0°F (2013) | 39.9°F (1952) | 0.58 in (1956) |
| September 12 | 84.9°F (1961) | 44.1°F (1949) | 0.60 in (2004) |
| September 13 | 87.1°F (1999) | 39.0°F (1952) | 0.51 in (1955) |
| September 14 | 93.0°F (1979) | 46.0°F (1955) | 0.73 in (1949) |
| September 15 | 93.0°F (1967) | 42.1°F (1952) | 0.69 in (1959) |
| September 16 | 91.0°F (1967) | 44.1°F (1952) | 0.76 in (1997) |
| September 17 | 84.9°F (1991) | 42.1°F (1965) | 1.49 in (2010) |
| September 18 | 84.9°F (1991) | 41.0°F (1948) | 0.81 in (2021) |
| September 19 | 82.0°F (1999) | 39.9°F (1957) | 0.79 in (1959) |
| September 20 | 88.0°F (1974) | 39.9°F (1949) | 1.05 in (1972) |
| September 21 | 88.0°F (1952) | 39.0°F (1955) | 0.94 in (1981) |
| September 22 | 91.9°F (1990) | 37.0°F (1955) | 1.65 in (1978) |
| September 23 | 82.9°F (1957) | 39.9°F (1948) | 1.08 in (2020) |
| September 24 | 89.1°F (1974) | 37.9°F (1948) | 0.99 in (1950) |
| September 25 | 84.9°F (1991) | 36.0°F (1972) | 0.82 in (2023) |
| September 26 | 82.0°F (2022) | 39.0°F (1972) | 1.51 in (1948) |
| September 27 | 89.1°F (1967) | 35.1°F (1972) | 1.04 in (1981) |
| September 28 | 86.0°F (2017) | 37.9°F (1950) | 1.71 in (2013) |
| September 29 | 81.0°F (1992) | 37.0°F (1954) | 0.92 in (1951) |
| September 30 | 82.0°F (1992) | 36.0°F (1950) | 1.65 in (1953) |