Kingshuk Mondal / CC BY 4.0
Seattle, WA Weather on July 17
Seattle hit 91°F on this date in 2009, a scorching outlier
July 17 typically brings mild summer weather to Seattle, with average highs around 76°F and lows near 58°F. However, the record high of 91°F set in 2009 represents a dramatic 15-degree departure from normal, demonstrating how rare intense heat events can occur in the Pacific Northwest. The record low of 51°F in 1987 shows the other extreme, revealing a 25-degree swing across 54 years of recorded data for this date.
What to Expect on July 17
Planning for July 17th in Seattle, WA? Great weather for outdoor activities.
Frequently Asked Questions
What was the warmest July 17 ever in Seattle?
The warmest July 17 in Seattle, WA reached 91°F in 2009. That is 15°F above the long-term average high of 76°F.
What was the coldest July 17 ever in Seattle?
The coldest July 17 in Seattle, WA dropped to 51°F in 1987. That is 7°F below the long-term average low of 58°F.
What is the average temperature on July 17 in Seattle?
On July 17, Seattle averages a high of 76°F and a low of 58°F based on 54 years of NOAA weather observations from SEATTLE URBAN SITE.
How many years of weather data are available for July 17 in Seattle?
We have 54 years of weather records for July 17 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.
July 17 Weather History in Seattle
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 84°F | 58°F | 0" | -- |
| 2024 | 86°F | 65°F | 0" | -- |
| 2023 | 77°F | 61°F | 0" | -- |
| 2022 | 68°F | 59°F | 0" | -- |
| 2021 | 75°F | 56°F | 0" | -- |
| 2020 | 70°F | 58°F | 0.15" | -- |
| 2019 | 73°F | 60°F | 0.05" | -- |
| 2018 | 86°F | 61°F | 0" | -- |
| 2017 | 76°F | 56°F | 0" | -- |
| 2016 | 80°F | 60°F | 0" | -- |
| 2015 | 83°F | 59°F | 0" | -- |
| 2014 | 81°F | 59°F | 0" | -- |
| 2013 | 73°F | 60°F | 0" | -- |
| 2012 | 72°F | 59°F | 0" | -- |
| 2011 | 63°F | 57°F | 0.15" | -- |
| 2010 | 72°F | 52°F | 0" | -- |
| 2009 | 91°F | 63°F | 0" | -- |
| 2008 | 73°F | 53°F | 0" | -- |
| 2007 | 72°F | 60°F | 0.13" | -- |
| 2006 | 69°F | 54°F | 0" | -- |
| 2005 | 81°F | 57°F | 0" | -- |
| 2004 | 83°F | 63°F | 0" | -- |
| 2003 | 77°F | 59°F | 0" | -- |
| 2002 | 80°F | 59°F | 0" | -- |
| 2001 | 69°F | 56°F | -- | -- |
| 2000 | 83°F | 58°F | 0" | -- |
| 1999 | 60°F | 55°F | 0.2" | -- |
| 1997 | 78°F | 56°F | 0" | -- |
| 1996 | 61°F | 52°F | 0.74" | -- |
| 1995 | 86°F | 62°F | 0" | -- |
| 1994 | 76°F | 58°F | 0" | -- |
| 1993 | 72°F | 58°F | 0" | -- |
| 1992 | 87°F | 59°F | 0" | -- |
| 1991 | 69°F | 60°F | 0" | -- |
| 1990 | 77°F | 57°F | 0" | -- |
| 1989 | 74°F | 59°F | 0" | -- |
| 1988 | 74°F | 57°F | 0" | -- |
| 1987 | 77°F | 51°F | 0" | -- |
| 1986 | 68°F | 55°F | 0" | -- |
| 1985 | 79°F | 59°F | 0" | -- |
| 1984 | 78°F | 60°F | 0" | -- |
| 1983 | 77°F | 55°F | 0.08" | -- |
| 1982 | 75°F | 55°F | 0" | -- |
| 1981 | 72°F | 60°F | 0" | -- |
| 1980 | 72°F | 55°F | 0" | -- |
| 1979 | 88°F | 62°F | 0" | -- |
| 1978 | 66°F | 56°F | 0" | -- |
| 1977 | 67°F | 54°F | 0" | -- |
| 1976 | 73°F | 55°F | 0" | -- |
| 1975 | 71°F | 56°F | 0" | -- |
| 1974 | 69°F | 61°F | 1.68" | -- |
| 1973 | 81°F | 58°F | 0" | -- |
| 1972 | 87°F | 65°F | 0" | -- |
| 1971 | 85°F | 57°F | 0" | -- |
Based on 54 years of data from NOAA station: SEATTLE URBAN SITE
How Has July 17 Changed?
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
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.