September weather in Waterville, WA
The average temperature in Waterville in September is 59.4°F (45.1°F–73.8°F). Average precipitation: 0.26 inches.
September is a fall month in Waterville, and is warmer than the annual average of 45.2°F. Daily temperatures swing about 28.7°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
73.8°F
Avg Low
45.1°F
Precipitation
0.26 in
Daylight
12h 19m
September records in Waterville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1998) | 36.0°F (1959) | 0.45 in (1944) |
| September 2 | 93.9°F (1955) | 37.0°F (1932) | 0.46 in (1971) |
| September 3 | 97.0°F (1988) | 30.0°F (1896) | 1.00 in (1916) |
| September 4 | 98.1°F (1988) | 30.9°F (1912) | 0.35 in (1899) |
| September 5 | 95.0°F (2006) | 27.0°F (1985) | 0.44 in (1937) |
| September 6 | 95.0°F (1909) | 28.9°F (1895) | 0.51 in (2013) |
| September 7 | 90.0°F (1909) | 30.9°F (1960) | 0.53 in (1947) |
| September 8 | 90.0°F (1981) | 33.1°F (1962) | 0.53 in (1924) |
| September 9 | 91.0°F (2011) | 32.0°F (1893) | 1.45 in (1952) |
| September 10 | 91.0°F (2011) | 28.9°F (1921) | 0.52 in (2019) |
| September 11 | 91.0°F (2011) | 26.1°F (1895) | 0.48 in (1903) |
| September 12 | 93.0°F (2011) | 30.0°F (1896) | 0.43 in (1905) |
| September 13 | 91.9°F (2009) | 24.1°F (1970) | 0.66 in (1980) |
| September 14 | 97.0°F (2013) | 28.0°F (1896) | 0.68 in (1940) |
| September 15 | 89.1°F (1995) | 27.0°F (1897) | 0.61 in (1986) |
| September 16 | 90.0°F (1981) | 30.0°F (1962) | 0.92 in (1954) |
| September 17 | 91.9°F (1981) | 26.1°F (1965) | 0.75 in (2019) |
| September 18 | 88.0°F (1967) | 28.9°F (1911) | 0.47 in (1986) |
| September 19 | 90.0°F (1994) | 28.9°F (2018) | 0.54 in (2010) |
| September 20 | 88.0°F (1967) | 28.0°F (1934) | 0.33 in (1973) |
| September 21 | 87.1°F (1967) | 25.0°F (1895) | 0.80 in (1898) |
| September 22 | 89.1°F (1967) | 25.0°F (2000) | 0.57 in (1984) |
| September 23 | 89.1°F (1966) | 21.0°F (1926) | 1.05 in (1973) |
| September 24 | 89.1°F (1994) | 15.1°F (1926) | 0.52 in (1959) |
| September 25 | 89.1°F (1994) | 19.9°F (1908) | 0.32 in (1901) |
| September 26 | 87.1°F (1974) | 19.9°F (1908) | 1.00 in (1948) |
| September 27 | 87.1°F (1994) | 21.9°F (1972) | 0.87 in (1927) |
| September 28 | 86.0°F (1991) | 24.1°F (1985) | 0.17 in (1977) |
| September 29 | 84.9°F (1967) | 26.1°F (1897) | 0.50 in (1909) |
| September 30 | 86.0°F (1907) | 24.1°F (1925) | 0.27 in (2013) |