September weather in Twisp, WA
The average temperature in Twisp in September is 59.1°F (41.2°F–77.0°F). Average precipitation: 0.45 inches.
September is a fall month in Twisp, and is warmer than the annual average of 45.7°F. Daily temperatures swing about 35.8°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
77.0°F
Avg Low
41.2°F
Precipitation
0.45 in
Daylight
12h 20m
September records in Twisp
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1918) | 30.9°F (1964) | 0.52 in (1983) |
| September 2 | 100.0°F (2025) | 32.0°F (1960) | 0.32 in (1912) |
| September 3 | 100.0°F (1988) | 30.0°F (1980) | 0.78 in (1946) |
| September 4 | 102.0°F (2025) | 32.0°F (1912) | 0.89 in (1938) |
| September 5 | 102.0°F (2025) | 30.0°F (1969) | 1.00 in (1937) |
| September 6 | 95.0°F (2020) | 30.0°F (1960) | 1.35 in (2013) |
| September 7 | 95.0°F (1944) | 28.0°F (1984) | 0.98 in (1930) |
| September 8 | 95.0°F (1944) | 27.0°F (1962) | 0.54 in (2019) |
| September 9 | 95.0°F (1940) | 28.9°F (1964) | 0.72 in (1952) |
| September 10 | 96.1°F (2011) | 28.9°F (1921) | 0.70 in (1978) |
| September 11 | 96.1°F (1944) | 27.0°F (1964) | 0.44 in (1919) |
| September 12 | 95.0°F (2011) | 26.1°F (1962) | 0.50 in (1966) |
| September 13 | 95.0°F (2011) | 21.0°F (1970) | 0.72 in (1980) |
| September 14 | 93.9°F (2009) | 27.0°F (1984) | 1.08 in (1959) |
| September 15 | 93.0°F (1938) | 26.1°F (1982) | 0.45 in (1954) |
| September 16 | 93.9°F (1981) | 26.1°F (1965) | 0.37 in (1954) |
| September 17 | 96.1°F (1981) | 26.1°F (1971) | 0.42 in (1907) |
| September 18 | 96.1°F (1981) | 28.0°F (1942) | 0.59 in (2019) |
| September 19 | 93.0°F (1918) | 24.1°F (1968) | 0.40 in (2010) |
| September 20 | 91.9°F (1918) | 24.1°F (1983) | 0.63 in (2023) |
| September 21 | 91.0°F (1939) | 27.0°F (1932) | 0.39 in (1972) |
| September 22 | 91.0°F (1987) | 27.0°F (1961) | 0.62 in (1973) |
| September 23 | 91.0°F (1987) | 24.1°F (2000) | 0.54 in (1973) |
| September 24 | 91.0°F (1990) | 19.9°F (1926) | 0.30 in (1938) |
| September 25 | 96.1°F (2003) | 21.9°F (1972) | 0.94 in (1948) |
| September 26 | 89.1°F (1974) | 21.9°F (1972) | 0.51 in (2001) |
| September 27 | 91.0°F (1994) | 21.9°F (1972) | 0.87 in (1940) |
| September 28 | 91.0°F (1994) | 19.9°F (1984) | 0.35 in (1981) |
| September 29 | 89.1°F (1963) | 18.0°F (1983) | 0.88 in (1937) |
| September 30 | 87.1°F (1970) | 21.0°F (1983) | 0.25 in (1964) |