Weather on September 11
Seattle, WA
55 Years of Data
About This Date
September 11th in Seattle, WA typically brings pleasant fall weather, with average highs around 72°F and lows near 55°F. Over 55 years of records, the warmest September 11th was in 2013 (76°F average), while the coldest was 1982 (56°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 16% of September 11th dates historically. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for September 11th in Seattle, WA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 69° | 54° | 61° | — | — |
| 2025 | 70° | 56° | 63° | — | — |
| 2024 | 70° | 56° | 63° | 0.14" | — |
| 2023 | 72° | 59° | 65° | — | — |
| 2022 | 76° | 61° | 68° | — | — |
| 2021 | 72° | 57° | 64° | — | — |
| 2020 | 77° | 56° | 66° | — | — |
| 2019 | 74° | 57° | 65° | — | — |
| 2018 | 69° | 57° | 63° | 0.05" | — |
| 2017 | 80° | 51° | 66° | — | — |
| 2016 | 70° | 57° | 63° | — | — |
| 2015 | 82° | 61° | 71° | — | — |
| 2014 | 78° | 53° | 66° | — | — |
| 2013warmest | 89° | 63° | 76° | — | — |
| 2012 | 65° | 51° | 58° | — | — |
| 2011 | 83° | 59° | 71° | — | — |
| 2010 | 68° | 55° | 62° | — | — |
| 2009 | 83° | 58° | 70° | — | — |
| 2008 | 75° | 53° | 64° | — | — |
| 2007 | 84° | 55° | 70° | — | — |
| 2006 | 76° | 53° | 64° | — | — |
| 2005 | 67° | 53° | 60° | 0.01" | — |
| 2004 | 70° | 56° | 63° | 0.23" | — |
| 2003 | 65° | 56° | 60° | 0.29" | — |
| 2002 | 76° | 58° | 67° | — | — |
| 2001 | 74° | 55° | 64° | — | — |
| 2000 | 70° | 51° | 60° | 0.01" | — |
| 1999 | 72° | 52° | 62° | — | — |
| 1997 | 66° | 58° | 62° | 0.04" | — |
| 1996 | 78° | 55° | 67° | — | — |
| 1995 | 68° | 56° | 62° | — | — |
| 1994 | 70° | 51° | 60° | — | — |
| 1993 | 69° | 54° | 61° | — | — |
| 1992 | 67° | 55° | 61° | — | — |
| 1991 | 68° | 53° | 61° | — | — |
| 1990 | 64° | 56° | 60° | — | — |
| 1989 | 76° | 53° | 64° | — | — |
| 1988 | 70° | 46° | 58° | — | — |
| 1987 | 62° | 57° | 60° | — | — |
| 1986 | 69° | 50° | 60° | — | — |
| 1985 | 68° | 54° | 61° | — | — |
| 1984 | 65° | 55° | 60° | — | — |
| 1983 | 69° | 55° | 62° | — | — |
| 1982coldest | 60° | 52° | 56° | 0.39" | — |
| 1981 | 74° | 53° | 63° | — | — |
| 1980 | 71° | 57° | 64° | — | — |
| 1979 | 70° | 51° | 60° | — | — |
| 1978 | 67° | 54° | 60° | — | — |
| 1977 | 72° | 51° | 61° | — | — |
| 1976 | 65° | 54° | 59° | — | — |
| 1975 | 80° | 56° | 68° | — | — |
| 1974 | 70° | 50° | 60° | — | — |
| 1973 | 69° | 57° | 63° | — | — |
| 1972 | 68° | 52° | 60° | — | — |
| 1971 | 71° | 56° | 63° | 0.01" | — |
Seattle, WA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Seattle, WA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Seattle, WA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Seattle, WA
Most pleasant months in Seattle, WA: May, June, July, August, September.
What to expect on September 11th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 11th outlook →