September weather in Harrington, WA
The average temperature in Harrington in September is 59.1°F (42.2°F–75.9°F). Average precipitation: 0.43 inches.
September is a fall month in Harrington, and is warmer than the annual average of 47.2°F. Daily temperatures swing about 33.7°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
75.9°F
Avg Low
42.2°F
Precipitation
0.43 in
Daylight
12h 19m
September records in Harrington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1987) | 30.0°F (2011) | 0.39 in (1981) |
| September 2 | 96.1°F (1988) | 33.1°F (2008) | 0.32 in (1979) |
| September 3 | 98.1°F (1988) | 30.0°F (1980) | 0.31 in (1979) |
| September 4 | 97.0°F (1988) | 28.0°F (2002) | 0.19 in (2000) |
| September 5 | 96.1°F (1988) | 25.0°F (1996) | 0.10 in (2013) |
| September 6 | 93.9°F (2003) | 24.1°F (1992) | 0.49 in (2013) |
| September 7 | 91.0°F (1990) | 28.0°F (1976) | 0.86 in (1995) |
| September 8 | 93.0°F (1981) | 28.9°F (2009) | 0.63 in (2003) |
| September 9 | 91.9°F (2011) | 24.1°F (2000) | 0.28 in (1982) |
| September 10 | 93.0°F (2011) | 30.0°F (1999) | 0.33 in (2000) |
| September 11 | 95.0°F (1996) | 23.0°F (2012) | 0.24 in (1985) |
| September 12 | 93.0°F (2013) | 26.1°F (1962) | 0.44 in (1982) |
| September 13 | 91.9°F (2013) | 28.9°F (1967) | 0.86 in (1980) |
| September 14 | 91.9°F (2002) | 21.9°F (1970) | 0.19 in (1993) |
| September 15 | 90.0°F (1998) | 23.0°F (1970) | 0.15 in (1986) |
| September 16 | 91.9°F (1981) | 25.0°F (2006) | 0.36 in (1963) |
| September 17 | 95.0°F (1981) | 19.9°F (1965) | 0.42 in (1997) |
| September 18 | 91.9°F (1981) | 23.0°F (1965) | 0.87 in (2017) |
| September 19 | 90.0°F (1981) | 27.0°F (1968) | 0.45 in (1988) |
| September 20 | 86.0°F (1979) | 24.1°F (1983) | 0.40 in (1973) |
| September 21 | 90.0°F (2014) | 26.1°F (1993) | 0.39 in (1972) |
| September 22 | 90.0°F (1966) | 21.9°F (1996) | 0.10 in (1973) |
| September 23 | 93.0°F (2001) | 19.0°F (2000) | 0.48 in (1986) |
| September 24 | 93.0°F (2011) | 24.1°F (1981) | 0.61 in (1977) |
| September 25 | 89.1°F (1997) | 23.0°F (1970) | 0.40 in (1998) |
| September 26 | 87.1°F (1963) | 24.1°F (1972) | 0.44 in (1982) |
| September 27 | 88.0°F (1963) | 21.9°F (1999) | 0.33 in (1981) |
| September 28 | 89.1°F (1963) | 23.0°F (1999) | 0.83 in (1962) |
| September 29 | 87.1°F (1992) | 24.1°F (1985) | 0.22 in (2013) |
| September 30 | 88.0°F (1992) | 21.9°F (2009) | 0.29 in (2005) |