Snohomish County, WA Weather Forecast
County weather hub
Showers And Thunderstorms
Compare major city weather across Snohomish County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain likely before 5am, then showers and thunderstorms. Cloudy. Low around 47, with temperatures rising to around 49 overnight. West southwest wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Snohomish County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 18 of 18 mapped cities in Snohomish County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 29 to Sep 4, 2026
- Latest sync
- Aug 29, 2026 5:20 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Snohomish County
Monday looks like the warmest upcoming period in Snohomish County at 67 degrees F.
Overnight is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Tuesday Night at about 3 to 7 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 29, 2026 5:20 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 2pm, then a chance of rain between 2pm and 4pm, then patchy fog and a slight chance of rain. Mostly cloudy, with a high near 56. West wind 1 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain between 9pm and 1am. Mostly cloudy. Low around 47, with temperatures rising to around 49 overnight. West northwest wind around 2 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Patchy fog between 11am and 3pm. Mostly cloudy, with a high near 58. Southwest wind around 1 mph.
Partly cloudy, with a low around 47. North wind 1 to 5 mph.
Mostly sunny, with a high near 67.
Mostly cloudy, with a low around 52.
A chance of rain after 11am. Mostly cloudy, with a high near 63.
A chance of rain. Mostly cloudy, with a low around 52.
Rain. Cloudy, with a high near 56.
Rain. Cloudy, with a low around 50.
Rain likely before 11am, then showers and thunderstorms likely between 11am and 5pm, then a chance of rain. Mostly cloudy, with a high near 57.
A chance of rain. Mostly cloudy, with a low around 48.
A chance of rain. Partly sunny, with a high near 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 29
|
Showers And Thunderstorms
|
47°F |
3 mph
WSW
|
|
Saturday
Aug 29
|
Showers And Thunderstorms
|
56°F |
1 to 5 mph
W
|
|
Saturday Night
Aug 29
|
Slight Chance Light Rain
|
47°F |
2 mph
WNW
|
|
Sunday
Aug 30
|
Patchy Fog
|
58°F |
1 mph
SW
|
|
Sunday Night
Aug 30
|
Partly Cloudy
|
47°F |
1 to 5 mph
N
|
|
Monday
Aug 31
|
Mostly Sunny
|
67°F |
1 to 5 mph
NE
|
|
Monday Night
Aug 31
|
Mostly Cloudy
|
52°F |
0 to 3 mph
ENE
|
|
Tuesday
Sep 1
|
Chance Light Rain
|
63°F |
5 mph
SSW
|
|
Tuesday Night
Sep 1
|
Chance Light Rain
|
52°F |
3 to 7 mph
S
|
|
Wednesday
Sep 2
|
Rain
|
56°F |
1 to 6 mph
S
|
|
Wednesday Night
Sep 2
|
Rain
|
50°F |
1 to 6 mph
SSE
|
|
Thursday
Sep 3
|
Showers And Thunderstorms Likely
|
57°F |
3 mph
SSW
|
|
Thursday Night
Sep 3
|
Chance Light Rain
|
48°F |
3 mph
ESE
|
|
Friday
Sep 4
|
Chance Light Rain
|
61°F |
3 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across Snohomish County.
Coverage
Forecast coverage currently spans 18 of 18 mapped cities in Snohomish County.
Largest mapped city population in this region: 112,482.
