September weather in Seaside, OR
The average temperature in Seaside in September is 58.3°F (50.1°F–66.6°F). Average precipitation: 2.91 inches.
September is a fall month in Seaside, and is warmer than the annual average of 51.7°F. Daily temperatures swing about 16.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
66.6°F
Avg Low
50.1°F
Precipitation
2.91 in
Daylight
12h 18m
September records in Seaside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1988) | 39.9°F (1973) | 0.71 in (1961) |
| September 2 | 97.0°F (1934) | 34.0°F (1986) | 1.54 in (1971) |
| September 3 | 96.1°F (1934) | 36.0°F (1986) | 0.95 in (1979) |
| September 4 | 97.0°F (1955) | 39.9°F (1956) | 2.33 in (1959) |
| September 5 | 95.0°F (1973) | 39.9°F (1951) | 1.21 in (1984) |
| September 6 | 93.0°F (1958) | 37.9°F (1947) | 1.51 in (1931) |
| September 7 | 91.9°F (1981) | 37.0°F (1960) | 0.87 in (1984) |
| September 8 | 90.0°F (1948) | 30.0°F (1983) | 0.75 in (1978) |
| September 9 | 96.1°F (1948) | 39.0°F (1970) | 1.12 in (1978) |
| September 10 | 93.0°F (2020) | 37.9°F (1944) | 1.03 in (1985) |
| September 11 | 88.0°F (1975) | 37.9°F (1988) | 0.89 in (1954) |
| September 12 | 90.0°F (1975) | 37.9°F (1970) | 1.41 in (1934) |
| September 13 | 93.9°F (1979) | 35.1°F (1970) | 1.38 in (1935) |
| September 14 | 93.0°F (1967) | 39.0°F (1947) | 2.04 in (1935) |
| September 15 | 91.0°F (1967) | 37.0°F (1969) | 1.96 in (1997) |
| September 16 | 87.1°F (2025) | 37.0°F (1936) | 0.79 in (1997) |
| September 17 | 89.1°F (1962) | 32.0°F (1936) | 3.02 in (1997) |
| September 18 | 89.1°F (1971) | 30.9°F (1936) | 1.94 in (2021) |
| September 19 | 93.0°F (1974) | 30.9°F (1983) | 1.25 in (2021) |
| September 20 | 93.0°F (2014) | 34.0°F (1936) | 2.75 in (2020) |
| September 21 | 97.0°F (1947) | 32.0°F (1960) | 1.25 in (1972) |
| September 22 | 93.0°F (1957) | 36.0°F (1943) | 1.42 in (1948) |
| September 23 | 95.0°F (1943) | 33.1°F (1936) | 1.22 in (1992) |
| September 24 | 95.0°F (1974) | 33.1°F (1936) | 1.78 in (2014) |
| September 25 | 90.0°F (1974) | 33.1°F (1936) | 1.39 in (1950) |
| September 26 | 95.0°F (1949) | 33.1°F (1936) | 2.08 in (2014) |
| September 27 | 91.0°F (1967) | 32.0°F (1972) | 1.22 in (1930) |
| September 28 | 93.0°F (1935) | 33.1°F (1936) | 3.29 in (2013) |
| September 29 | 91.0°F (1957) | 32.0°F (1983) | 1.76 in (2013) |
| September 30 | 87.1°F (1975) | 32.0°F (1950) | 2.66 in (1937) |