September weather in Grandview, WA
The average temperature in Grandview in September is 61.1°F (44.5°F–77.7°F). Average precipitation: 0.36 inches.
September is a fall month in Grandview, and is warmer than the annual average of 49.9°F. Daily temperatures swing about 33.2°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
77.7°F
Avg Low
44.5°F
Precipitation
0.36 in
Daylight
12h 19m
September records in Grandview
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1967) | 37.0°F (1897) | 0.36 in (1901) |
| September 2 | 102.9°F (1987) | 37.0°F (1919) | 0.68 in (1907) |
| September 3 | 99.0°F (1998) | 37.0°F (1912) | 0.25 in (1979) |
| September 4 | 99.0°F (1998) | 37.9°F (1912) | 0.77 in (1937) |
| September 5 | 98.1°F (2003) | 36.0°F (1912) | 0.78 in (1911) |
| September 6 | 98.1°F (1944) | 35.1°F (1895) | 0.80 in (1971) |
| September 7 | 99.0°F (1944) | 34.0°F (1929) | 0.51 in (1995) |
| September 8 | 97.0°F (1923) | 33.1°F (1908) | 0.59 in (1995) |
| September 9 | 98.1°F (1935) | 30.9°F (1895) | 0.53 in (1933) |
| September 10 | 96.1°F (1963) | 34.0°F (1913) | 0.64 in (1927) |
| September 11 | 97.0°F (1944) | 34.0°F (2012) | 0.32 in (1966) |
| September 12 | 99.0°F (1922) | 28.9°F (1921) | 0.60 in (1903) |
| September 13 | 96.1°F (1923) | 27.0°F (1921) | 0.43 in (1920) |
| September 14 | 95.0°F (1929) | 33.1°F (1915) | 0.56 in (1918) |
| September 15 | 96.1°F (1938) | 30.9°F (1936) | 0.38 in (1986) |
| September 16 | 96.1°F (1938) | 30.0°F (1936) | 1.42 in (1986) |
| September 17 | 97.0°F (1938) | 30.0°F (1965) | 0.47 in (1954) |
| September 18 | 95.0°F (1981) | 30.9°F (1909) | 0.48 in (1969) |
| September 19 | 95.0°F (1952) | 35.1°F (1928) | 0.41 in (2010) |
| September 20 | 95.0°F (1967) | 30.0°F (1895) | 0.26 in (1973) |
| September 21 | 93.0°F (1936) | 30.0°F (1932) | 0.52 in (1898) |
| September 22 | 97.0°F (1967) | 28.9°F (1955) | 0.15 in (1934) |
| September 23 | 93.0°F (1966) | 30.0°F (1926) | 0.27 in (1984) |
| September 24 | 91.9°F (1952) | 21.9°F (1926) | 0.60 in (1986) |
| September 25 | 93.0°F (2001) | 18.0°F (1926) | 0.46 in (1923) |
| September 26 | 97.0°F (1952) | 23.0°F (1926) | 0.46 in (1940) |
| September 27 | 91.0°F (2003) | 26.1°F (1926) | 0.66 in (1981) |
| September 28 | 93.9°F (1918) | 30.0°F (1916) | 0.36 in (1955) |
| September 29 | 91.9°F (2003) | 26.1°F (1919) | 0.37 in (1962) |
| September 30 | 90.0°F (1980) | 28.9°F (1919) | 0.36 in (1925) |