Home / Local Weather & Traffic / Washington / Seattle / Weather Forecast

Seattle, WA Weather Tomorrow

Tomorrow's forecast for Seattle includes an extended 5 day weather outlook with precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Seattle area and around King county, Washington.
Updated: Tue Sep 15th 2026 5:30 PM PDT
Seattle, WA Weather – 9-15 – Sunny
68° / 52°
Sunny
It will be sunny in Seattle, with a high of 68°F and a low of 52°F. Rainfall predicted to have a 57% chance with an estimated 0.04in. Wind will be moderate, blowing around 11mph on average and gusts of 18.9mph at 8 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 75% at 11 PM and 54% being its lowest at 6 PM. Barometric pressure is its highest of 30.08inHg at 11 PM, a lowest point of 30.01inHg at 6 PM with an avg 30.05inHg.
Seattle, WA Weather – 9-16 – Sunny
75° / 53°

Weather Tomorrow

Sunny
Seattle may see sunshine, with daytime highs of 75°F and overnight lows near 53°F. There's a very small chance of rainfall, only about 3%. Winds will be light at 9mph and gusts of 16.6mph at 7 PM. The humidity will be on the higher side, averaging about 61%, the maximum being 88% at 7 AM and 33% being its lowest at 3 PM. Barometric pressure is its highest of 30.16inHg at 8 AM, a lowest point of 30.03inHg at 6 PM with an avg 30.09inHg.
Seattle, WA Weather – 9-17 – Sunny
76° / 55°
Sunny
Daytime highs will reach 76°F with lows dropping to 55°F in Seattle, where it will be sunny. There's a very small chance of rainfall, only about 3%. Winds will be light at 6mph and gusts of 17mph at 4 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 80% at 7 AM and 34% being its lowest at 4 PM. Barometric pressure is its highest of 30.03inHg at 11 PM, a lowest point of 29.96inHg at 6 PM with an avg 30inHg.
Seattle, WA Weather – 9-18 – Sunny
74° / 53°
Sunny
Sunshine is in the forecast for Seattle, with a high of 74°F and a low of 53°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 6mph and gusts of 12.4mph at 1 AM. The humidity will be on the higher side, averaging about 62%, the maximum being 85% at 7 AM and 36% being its lowest at 5 PM. Barometric pressure is its highest of 30.16inHg at 10 AM, a lowest point of 30.05inHg at 12 AM with an avg 30.11inHg.
Seattle, WA Weather – 9-19 – Overcast
74° / 53°
Overcast
Overcast is in the forecast for Seattle, with a high of 74°F and a low of 53°F. There might be light rainfall having a 11% chance. Winds will be light at 7mph and gusts of 10.8mph at 8 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 90% at 7 AM and 38% being its lowest at 3 PM. Barometric pressure is its highest of 30.13inHg at 12 AM, a lowest point of 30inHg at 6 PM with an avg 30.07inHg.
Seattle, WA Weather – 9-20 – Overcast
74° / 54°
Overcast
In Seattle, cloud-filled skies are likely with a high near 74°F and a low around 54°F. There might be light rainfall having a 12% chance. Winds will be light at 6mph and gusts of 14.8mph at 5 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 85% at 5 AM and 38% being its lowest at 2 PM. Barometric pressure is its highest of 30.05inHg at 11 PM, a lowest point of 29.97inHg at 4 PM with an avg 29.99inHg.

Currently

Sunny 66°F
30 inHg.
Barometer
49%
Humidity
NNW 16.2 mph
Wind
Sunny

5 Day Forecast Nearby

More Local Information

Bookmark and Share

Get the LocalConditions.com App on Google Play
Sign up for a membership to go Ad free