September weather in Fairfield, WA
The average temperature in Fairfield in September is 58.4°F (44.2°F–72.6°F). Average precipitation: 1.02 inches.
September is a fall month in Fairfield, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 28.4°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
72.6°F
Avg Low
44.2°F
Precipitation
1.02 in
Daylight
12h 19m
September records in Fairfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (2022) | 34.0°F (1995) | 0.01 in (2015) |
| September 2 | 97.0°F (1988) | 35.1°F (1995) | 0.00 in (1950) |
| September 3 | 96.1°F (1988) | 34.0°F (1995) | 0.47 in (1997) |
| September 4 | 96.1°F (1988) | 37.0°F (2009) | 0.47 in (1997) |
| September 5 | 95.0°F (1988) | 34.0°F (1992) | 0.24 in (2013) |
| September 6 | 93.9°F (1988) | 30.0°F (1999) | 0.53 in (2016) |
| September 7 | 90.0°F (1990) | 30.9°F (1992) | 0.26 in (1995) |
| September 8 | 90.0°F (1990) | 37.0°F (2002) | 0.85 in (1995) |
| September 9 | 87.1°F (1990) | 34.0°F (1992) | 0.25 in (2016) |
| September 10 | 87.1°F (1990) | 37.0°F (1992) | 0.61 in (2019) |
| September 11 | 90.0°F (1996) | 34.0°F (1989) | 0.12 in (1997) |
| September 12 | 91.9°F (2013) | 35.1°F (1988) | 0.33 in (1996) |
| September 13 | 93.0°F (2013) | 33.1°F (1992) | 0.00 in (1950) |
| September 14 | 91.9°F (2002) | 30.9°F (1992) | 0.63 in (1996) |
| September 15 | 91.0°F (2002) | 32.0°F (1996) | 0.40 in (1993) |
| September 16 | 91.9°F (2013) | 30.9°F (1996) | 0.09 in (1992) |
| September 17 | 91.0°F (2009) | 32.0°F (2021) | 0.18 in (1997) |
| September 18 | 91.0°F (2008) | 28.9°F (1988) | 0.60 in (2002) |
| September 19 | 84.9°F (1994) | 36.0°F (1989) | 0.39 in (2016) |
| September 20 | 84.0°F (1991) | 34.0°F (2002) | 0.38 in (2021) |
| September 21 | 82.9°F (2014) | 28.9°F (1991) | 0.03 in (2017) |
| September 22 | 91.0°F (2014) | 27.0°F (1996) | 0.00 in (1950) |
| September 23 | 91.0°F (2014) | 30.9°F (2008) | 0.16 in (2013) |
| September 24 | 91.9°F (2009) | 32.0°F (1999) | 0.69 in (1992) |
| September 25 | 88.0°F (1990) | 33.1°F (2007) | 0.67 in (1998) |
| September 26 | 87.1°F (1990) | 32.0°F (2007) | 0.21 in (1998) |
| September 27 | 86.0°F (2016) | 33.1°F (1992) | 0.10 in (1995) |
| September 28 | 91.9°F (2022) | 32.0°F (1988) | 1.07 in (1995) |
| September 29 | 82.9°F (1989) | 30.0°F (2019) | 0.24 in (1995) |
| September 30 | 88.0°F (1992) | 28.0°F (1995) | 1.14 in (2013) |