September weather in Arlington, OR
The average temperature in Arlington in September is 66.5°F (53.1°F–80.0°F). Average precipitation: 0.33 inches.
September is a fall month in Arlington, and is warmer than the annual average of 54.3°F. Daily temperatures swing about 26.9°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
80.0°F
Avg Low
53.1°F
Precipitation
0.33 in
Daylight
12h 18m
September records in Arlington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1987) | 44.1°F (1999) | 0.74 in (1971) |
| September 2 | 104.0°F (1950) | 43.0°F (1959) | 0.24 in (1941) |
| September 3 | 100.9°F (1998) | 37.0°F (1958) | 0.35 in (1899) |
| September 4 | 99.0°F (1998) | 41.0°F (1956) | 0.25 in (1901) |
| September 5 | 100.9°F (1966) | 39.9°F (1956) | 0.36 in (1937) |
| September 6 | 100.0°F (1944) | 39.0°F (1895) | 0.57 in (1971) |
| September 7 | 102.9°F (1944) | 39.0°F (1960) | 0.46 in (1926) |
| September 8 | 100.9°F (1944) | 39.0°F (1960) | 0.39 in (1995) |
| September 9 | 100.9°F (1963) | 36.0°F (1959) | 0.28 in (1940) |
| September 10 | 98.1°F (1944) | 39.0°F (1964) | 0.45 in (1985) |
| September 11 | 100.0°F (1944) | 37.9°F (1964) | 0.58 in (1893) |
| September 12 | 96.1°F (1960) | 30.9°F (1949) | 0.22 in (1928) |
| September 13 | 95.0°F (2002) | 35.1°F (1949) | 0.60 in (1895) |
| September 14 | 95.0°F (1932) | 37.0°F (1952) | 0.25 in (2025) |
| September 15 | 98.1°F (2013) | 36.0°F (1970) | 0.38 in (1996) |
| September 16 | 100.0°F (1934) | 32.0°F (1965) | 0.34 in (1954) |
| September 17 | 97.0°F (1938) | 33.1°F (1965) | 0.44 in (1954) |
| September 18 | 96.1°F (1984) | 32.0°F (1965) | 0.64 in (2010) |
| September 19 | 95.0°F (1952) | 34.0°F (1957) | 1.37 in (2010) |
| September 20 | 93.9°F (1952) | 33.1°F (1949) | 0.30 in (1982) |
| September 21 | 95.0°F (1967) | 33.1°F (1949) | 0.10 in (1898) |
| September 22 | 93.0°F (1966) | 36.0°F (1993) | 0.30 in (1926) |
| September 23 | 93.9°F (1947) | 32.0°F (2000) | 0.33 in (1986) |
| September 24 | 95.0°F (1952) | 28.9°F (1926) | 0.35 in (1901) |
| September 25 | 97.0°F (1952) | 26.1°F (1926) | 0.30 in (1901) |
| September 26 | 93.9°F (1899) | 30.0°F (1926) | 0.14 in (1948) |
| September 27 | 91.9°F (1963) | 30.9°F (1972) | 0.56 in (1957) |
| September 28 | 93.9°F (1967) | 32.0°F (1999) | 0.31 in (1962) |
| September 29 | 90.0°F (1996) | 30.9°F (1983) | 0.28 in (1951) |
| September 30 | 89.1°F (1991) | 30.0°F (1954) | 0.86 in (2005) |