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Seattle, WA Weather on April 9
Seattle sets spring record with 71°F on April 9, 1989
April 9th has seen dramatic temperature swings across Seattle's 55-year weather record, with a scorching 71°F peak in 1989 standing 13 degrees above the seasonal average high of 58°F. The coldest reading for this date came just 19 years later in 2008 when temperatures plummeted to 35°F, showing the wide variability typical of Pacific Northwest spring weather. On average, Seattle residents can expect mild spring conditions ranging from 42°F to 58°F this time of year.
What to Expect on April 9
Planning for April 9th in Seattle, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Frequently Asked Questions
What was the warmest April 9 ever in Seattle?
The warmest April 9 in Seattle, WA reached 71°F in 1989. That is 13°F above the long-term average high of 58°F.
What was the coldest April 9 ever in Seattle?
The coldest April 9 in Seattle, WA dropped to 35°F in 2021. That is 7°F below the long-term average low of 42°F.
What is the average temperature on April 9 in Seattle?
On April 9, Seattle averages a high of 58°F and a low of 42°F based on 55 years of NOAA weather observations from SEATTLE URBAN SITE.
How many years of weather data are available for April 9 in Seattle?
We have 55 years of weather records for April 9 in Seattle, WA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
April 9 Weather History in Seattle
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 60°F | 41°F | 0" | -- |
| 2024 | 57°F | 48°F | 0.03" | -- |
| 2023 | 56°F | 47°F | 0.74" | -- |
| 2022 | 49°F | 36°F | 0.23" | -- |
| 2021 | 50°F | 35°F | 0.03" | -- |
| 2020 | 67°F | 42°F | 0" | -- |
| 2019 | 58°F | 47°F | 0.48" | -- |
| 2018 | 62°F | 42°F | 0" | -- |
| 2017 | 56°F | 36°F | 0.03" | -- |
| 2016 | 66°F | 47°F | 0" | -- |
| 2015 | 66°F | 44°F | 0" | -- |
| 2014 | 59°F | 45°F | 0" | -- |
| 2013 | 55°F | 44°F | 0" | -- |
| 2012 | 68°F | 45°F | 0" | -- |
| 2011 | 54°F | 43°F | 0" | -- |
| 2010 | 52°F | 40°F | 0.18" | -- |
| 2009 | 58°F | 44°F | 0.05" | -- |
| 2008 | 52°F | 35°F | 0" | -- |
| 2007 | 54°F | 43°F | 0.61" | -- |
| 2006 | 56°F | 46°F | 0.03" | -- |
| 2005 | 57°F | 39°F | 0" | -- |
| 2004 | 67°F | 43°F | 0" | -- |
| 2003 | 59°F | 43°F | 0" | -- |
| 2002 | 59°F | 48°F | 1.12" | -- |
| 2001 | 55°F | 36°F | 0" | -- |
| 2000 | 58°F | 45°F | 0" | -- |
| 1999 | 50°F | 36°F | 0.05" | -- |
| 1998 | 56°F | 41°F | 0" | -- |
| 1997 | 59°F | 43°F | 0" | -- |
| 1996 | 64°F | 52°F | 0" | -- |
| 1995 | 57°F | 42°F | 0" | -- |
| 1994 | 58°F | 45°F | 0" | -- |
| 1993 | 55°F | 46°F | 0.53" | -- |
| 1992 | 51°F | 40°F | 0.18" | -- |
| 1991 | 52°F | 39°F | 0.2" | -- |
| 1990 | 57°F | 39°F | 0" | -- |
| 1989 | 71°F | 41°F | 0" | -- |
| 1988 | 69°F | 37°F | 0" | -- |
| 1987 | 62°F | 45°F | 0" | -- |
| 1986 | 50°F | 41°F | 0.05" | -- |
| 1985 | 69°F | 43°F | 0" | -- |
| 1984 | 49°F | 43°F | 1.78" | -- |
| 1983 | 50°F | 41°F | 0.03" | -- |
| 1982 | 62°F | 36°F | 0" | -- |
| 1981 | 53°F | 42°F | 0" | -- |
| 1980 | 53°F | 44°F | 1.45" | -- |
| 1979 | 52°F | 41°F | 0.97" | -- |
| 1978 | 64°F | 38°F | 0" | -- |
| 1977 | 55°F | 45°F | 0" | -- |
| 1976 | 65°F | 42°F | 0" | -- |
| 1975 | 55°F | 42°F | 0" | -- |
| 1974 | 48°F | 46°F | 0.23" | -- |
| 1973 | 67°F | 47°F | 0" | -- |
| 1972 | 54°F | 38°F | 0.41" | -- |
| 1971 | 47°F | 38°F | 2.16" | -- |
Based on 55 years of data from NOAA station: SEATTLE URBAN SITE
How Has April 9 Changed?
Temperatures on this date have remained relatively stable over the past several decades.
Monthly Climate Averages
Historical temperature and precipitation averages for Seattle, WA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.