September weather in Bainbridge Island, WA
The average temperature in Bainbridge Island in September is 61.5°F (51.1°F–71.9°F). Average precipitation: 1.80 inches.
September is a fall month in Bainbridge Island, and is warmer than the annual average of 52.3°F. Daily temperatures swing about 20.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 19m. For travel, September is one of the best months of the year to visit.
Avg High
71.9°F
Avg Low
51.1°F
Precipitation
1.80 in
Daylight
12h 19m
September records in Bainbridge Island
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1987) | 37.0°F (1903) | 0.55 in (1927) |
| September 2 | 91.0°F (1987) | 36.0°F (1903) | 1.69 in (1971) |
| September 3 | 97.0°F (1988) | 39.9°F (1903) | 0.72 in (1913) |
| September 4 | 95.0°F (1988) | 43.0°F (1956) | 1.28 in (1913) |
| September 5 | 88.0°F (2017) | 44.1°F (1969) | 0.53 in (1978) |
| September 6 | 91.9°F (1973) | 44.1°F (1901) | 0.86 in (1984) |
| September 7 | 93.0°F (2024) | 42.1°F (1899) | 0.48 in (1970) |
| September 8 | 93.9°F (1981) | 39.9°F (1903) | 1.19 in (1931) |
| September 9 | 86.0°F (1993) | 41.0°F (1952) | 1.47 in (1978) |
| September 10 | 89.1°F (1963) | 41.0°F (1952) | 0.62 in (1978) |
| September 11 | 99.0°F (1917) | 39.9°F (1903) | 1.12 in (1934) |
| September 12 | 93.0°F (2013) | 41.0°F (1921) | 1.54 in (1920) |
| September 13 | 84.0°F (1975) | 36.0°F (1970) | 0.99 in (1936) |
| September 14 | 87.1°F (1999) | 39.9°F (1903) | 1.01 in (1933) |
| September 15 | 93.0°F (1979) | 35.1°F (1903) | 1.16 in (1935) |
| September 16 | 91.9°F (1967) | 35.1°F (1903) | 0.51 in (1946) |
| September 17 | 91.0°F (1967) | 37.9°F (1903) | 1.89 in (1997) |
| September 18 | 82.0°F (2012) | 39.0°F (1965) | 1.72 in (1969) |
| September 19 | 88.0°F (1901) | 37.9°F (1983) | 1.11 in (2011) |
| September 20 | 84.0°F (1999) | 39.0°F (1902) | 0.82 in (1973) |
| September 21 | 87.1°F (1974) | 30.0°F (2003) | 2.03 in (1972) |
| September 22 | 89.1°F (1952) | 39.0°F (1902) | 0.85 in (1972) |
| September 23 | 91.9°F (1990) | 39.0°F (1900) | 1.35 in (2013) |
| September 24 | 88.0°F (2009) | 37.9°F (1970) | 2.12 in (2014) |
| September 25 | 90.0°F (1997) | 37.0°F (1900) | 1.65 in (1988) |
| September 26 | 84.9°F (1991) | 34.0°F (1900) | 1.12 in (1902) |
| September 27 | 82.9°F (2022) | 33.1°F (1972) | 1.48 in (2021) |
| September 28 | 87.1°F (1967) | 37.9°F (1983) | 1.02 in (1953) |
| September 29 | 88.0°F (2017) | 37.0°F (1954) | 2.20 in (2013) |
| September 30 | 82.9°F (1992) | 35.1°F (2009) | 1.60 in (1953) |