September weather in Tumwater, WA
The average temperature in Tumwater in September is 59.1°F (46.2°F–72.1°F). Average precipitation: 2.04 inches.
September is a fall month in Tumwater, and is warmer than the annual average of 50.5°F. Daily temperatures swing about 25.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
72.1°F
Avg Low
46.2°F
Precipitation
2.04 in
Daylight
12h 19m
September records in Tumwater
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (1987) | 32.0°F (1973) | 1.16 in (1971) |
| September 2 | 98.1°F (1988) | 36.0°F (1960) | 0.84 in (1941) |
| September 3 | 91.0°F (1972) | 36.0°F (1956) | 0.89 in (1945) |
| September 4 | 91.9°F (2003) | 36.0°F (1952) | 1.32 in (1959) |
| September 5 | 95.0°F (1944) | 37.0°F (1947) | 1.01 in (2013) |
| September 6 | 91.0°F (2024) | 36.0°F (1992) | 1.54 in (2009) |
| September 7 | 96.1°F (1981) | 34.0°F (1992) | 0.55 in (1947) |
| September 8 | 90.0°F (1993) | 35.1°F (1976) | 1.02 in (1986) |
| September 9 | 91.0°F (1963) | 36.0°F (1976) | 1.34 in (1978) |
| September 10 | 93.0°F (1944) | 35.1°F (1964) | 0.68 in (1962) |
| September 11 | 91.0°F (2013) | 34.0°F (1988) | 0.93 in (2024) |
| September 12 | 88.0°F (1945) | 32.0°F (1949) | 0.17 in (1976) |
| September 13 | 89.1°F (1999) | 27.0°F (1970) | 0.68 in (1963) |
| September 14 | 90.0°F (1951) | 35.1°F (1992) | 0.76 in (1968) |
| September 15 | 93.9°F (1967) | 32.0°F (1969) | 1.00 in (1955) |
| September 16 | 90.0°F (1967) | 33.1°F (1973) | 0.95 in (1997) |
| September 17 | 86.0°F (1994) | 32.0°F (1965) | 1.67 in (2010) |
| September 18 | 86.0°F (1991) | 30.9°F (1942) | 0.85 in (2010) |
| September 19 | 86.0°F (1999) | 30.0°F (1983) | 1.05 in (1959) |
| September 20 | 91.9°F (1974) | 32.0°F (1983) | 1.11 in (1972) |
| September 21 | 91.0°F (1974) | 32.0°F (1955) | 1.51 in (1972) |
| September 22 | 91.0°F (1990) | 30.9°F (1961) | 1.50 in (1978) |
| September 23 | 91.0°F (1957) | 26.1°F (2000) | 1.23 in (2020) |
| September 24 | 93.0°F (1943) | 30.0°F (2000) | 1.30 in (1950) |
| September 25 | 84.9°F (1991) | 30.9°F (1972) | 0.88 in (2020) |
| September 26 | 86.0°F (2022) | 28.0°F (1972) | 1.12 in (1948) |
| September 27 | 93.0°F (1967) | 25.0°F (1972) | 0.75 in (1953) |
| September 28 | 88.0°F (2017) | 30.0°F (1999) | 2.93 in (2013) |
| September 29 | 89.1°F (1993) | 30.0°F (1961) | 1.14 in (2005) |
| September 30 | 82.9°F (1987) | 28.9°F (1950) | 1.52 in (2013) |