Weather on September 1
Federal Way, WA
55 Years of Data
Avg High
74°F
Avg Low
53°F
Warmest
1987
73°F avg
Coldest
1973
53°F avg
About This Date
September 1st in Federal Way, WA typically brings pleasant fall weather, with average highs around 74°F and lows near 53°F. Over 55 years of records, the warmest September 1st was in 1987 (73°F average), while the coldest was 1973 (53°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 1st dates historically, with the wettest September 1st recording 1.83" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Federal Way, WA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 60° | 65° | — | — |
| 2024 | 83° | 60° | 71° | — | — |
| 2023 | 75° | 59° | 67° | — | — |
| 2022 | 75° | 60° | 68° | — | — |
| 2021 | 70° | 47° | 58° | — | — |
| 2020 | 79° | 54° | 66° | — | — |
| 2019 | 78° | 65° | 71° | — | — |
| 2018 | 70° | 57° | 63° | — | — |
| 2017 | 81° | 57° | 69° | — | — |
| 2016 | 67° | 57° | 62° | — | — |
| 2015 | 67° | 59° | 63° | 0.23" | — |
| 2014 | 74° | 54° | 64° | — | — |
| 2013 | 79° | 56° | 67° | — | — |
| 2012 | 72° | 51° | 61° | — | — |
| 2011 | 73° | 49° | 61° | — | — |
| 2010 | 69° | 57° | 63° | 0.03" | — |
| 2009 | 70° | 56° | 63° | — | — |
| 2008 | 65° | 49° | 57° | — | — |
| 2007 | 73° | 55° | 64° | — | — |
| 2006 | 88° | 55° | 71° | — | — |
| 2005 | 78° | 57° | 68° | — | — |
| 2004 | 78° | 56° | 67° | — | — |
| 2003 | 76° | 53° | 64° | — | — |
| 2002 | 72° | 53° | 62° | — | — |
| 2001 | 73° | 59° | 66° | — | — |
| 2000 | 68° | 50° | 59° | — | — |
| 1999 | 66° | 45° | 55° | — | — |
| 1998 | 84° | 59° | 72° | — | — |
| 1997 | 77° | 58° | 67° | — | — |
| 1996 | 71° | 54° | 62° | — | — |
| 1995 | 80° | 54° | 67° | — | — |
| 1994 | 77° | 56° | 66° | — | — |
| 1993 | 77° | 52° | 64° | — | — |
| 1992 | 77° | 58° | 67° | — | — |
| 1991 | 71° | 53° | 62° | — | — |
| 1990 | 74° | 55° | 64° | — | — |
| 1989 | 70° | 54° | 62° | 0.25" | — |
| 1988 | 85° | 46° | 65° | — | — |
| 1987warmest | 89° | 57° | 73° | — | — |
| 1986 | 73° | 51° | 62° | — | — |
| 1985 | 72° | 56° | 64° | — | — |
| 1984 | 71° | 56° | 63° | — | — |
| 1983 | 72° | 58° | 65° | 1.83" | — |
| 1982 | 79° | 49° | 64° | — | — |
| 1981 | 67° | 53° | 60° | 0.2" | — |
| 1980 | 64° | 47° | 55° | 0.51" | — |
| 1979 | 75° | 56° | 65° | 0.74" | — |
| 1978 | 69° | 58° | 63° | 1.12" | — |
| 1977 | 74° | 42° | 58° | 0.25" | — |
| 1976 | 76° | 49° | 62° | — | — |
| 1975 | 65° | 45° | 55° | — | — |
| 1974 | 86° | 50° | 68° | — | — |
| 1973coldest | 72° | 34° | 53° | — | — |
| 1972 | 82° | 43° | 62° | — | — |
| 1971 | 67° | 45° | 56° | 1.22" | — |
55 years of data from KENT