Based on climatological records from NOAA and Seattle–Tacoma International Airport, here are the Seattle annual rainfall totals for the past 10 years (2015–2024).
Seattle annual rainfall (2015–2024)
| Year | Precipitation (mm) | Comments |
|---|---|---|
| 2024 | ~920 mm | Slightly below-average year climatestations |
| 2023 | 889 mm | Slightly drier than normal currentresults |
| 2022 | 1,024 mm | Close to average, following a wet spring currentresults |
| 2021 | 1,102 mm | Wetter than normal, multiple atmospheric river events currentresults |
| 2020 | 1,050 mm | Near the city’s long-term mean currentresults |
| 2019 | 861 mm | One of the driest years in the decade currentresults |
| 2018 | 909 mm | Near normal values currentresults |
| 2017 | 1,218 mm | Exceptionally wet year with frequent storms currentresults |
| 2016 | 1,148 mm | Wet winter and early spring currentresults |
| 2015 | 1,139 mm | Warmer and slightly drier summer currentresults |
Decadal overview
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Average (2015–2024): approximately 1,036 mm (40.8 inches) per year.
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Wettest year: 2017 (1,218 mm).
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Driest year: 2019 (861 mm).
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Long-term normal (1991–2020): about 998 mm (39.3 inches), meaning the past decade was slightly wetter than average overall.climatestations+1
Observations
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Rain falls on about 150 days per year, often light but frequent.currentresults+1
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Peak rainfall months: November through January.
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Summers (July–August): typically under 40 mm combined, showing strong seasonal contrast.wikipedia
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Variability in these years reflects El Niño–La Niña cycles; for instance, 2017’s high rainfall coincided with strong La Niña conditions, while 2019’s dryness aligned with a weak El Niño phase.climatestations
In summary, Seattle’s last decade shows a mild upward rainfall trend compared to historical averages, though 2023–2024 were notably drier within that span.
- https://www.climatestations.com/seattle-2/
- https://www.currentresults.com/Yearly-Weather/USA/WA/Seattle/recent-annual-seattle-temperature-precipitation.php
- https://en.wikipedia.org/wiki/Climate_of_Seattle
- https://seattleweatherblog.com/rain-stats/
- https://www.weather.gov/sew/Cliplot
- https://www.usclimatedata.com/climate/seattle/washington/united-states/uswa0844
- https://globalwarmingcities.com/seattle/tot_precip.html
- https://www.ncdc.noaa.gov/cdo-web/datasets/LCD/stations/WBAN:24234/detail
- https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series
- https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings/45/pcp
- https://wrcc.dri.edu/cgi-bin/nws_report.pl?cityclm+waseatt
- https://www.litterrocks.com/weather-charts-and-graphics
- https://www.weather.gov/ffc/rainfall_scorecard
- https://a.atmos.washington.edu/cgi-bin/list_climate.cgi?clisea+latest
- https://climate.uw.edu/our-work/wasco-tools/trend-tool/
- https://www.ncei.noaa.gov/access/monitoring/monthly-report/national/202413
- https://www.weather.gov/wrh/climate?wfo=sew
- https://www.ncei.noaa.gov/access/monitoring/monthly-report/national
- https://seattleweatherblog.com/rain-stats/attachment/image003-17/
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