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Rosario, Washington Weather Forecast
Rosario, Washington Weather
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Weather Forecast for Rosario, Washington : San Juan County
Issued: 7:01 pm PST Dec 14, 2025 Latitude: 48.6487148 Longitude: -122.876016 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
100% chance of rain on Tonight 70% chance of rain on Monday 100% chance of rain on Tuesday 70% chance of rain on Wednesday Rain on Thursday 70% chance of rain on Friday Rain on Saturday 70% chance of rain on Sunday
Low: 50°F High: 55°F High: 50°F High: 47°F High: 47°F High: 45°F High: 44°F High: 45°F
Low: 45°F Low: 43°F Low: 42°F Low: 41°F Low: 39°F Low: 40°F  
Rain Rain Rain Rain Rain Rain Rain Rain
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Current Conditions at
ORCAS ISLAND ARPT - (KORS)
55°
Mostly Cloudy
Light Rain
as of 10:35 PM PST
Rel. Humidity: 87%
Dew Point: 52°F
Visibility: 9 Miles
Pressure: 29.83 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 26 MPH
160° South
Cloud Level(s): Few at 2900ft, Scattered at 5500ft, Broken at 7500ft
Current Conditions at
FRIDAY HARBOR - (KFHR)
52°
Mostly Clear
as of 9:53 PM PST
Rel. Humidity: 81%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 24 MPH
170° South
Cloud Level(s): Few at 10000ft
Current Conditions at
BELLINGHAM - (KBLI)
55°
Cloudy
as of 9:55 PM PST
Rel. Humidity: 76%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 25 MPH
160° South
Cloud Level(s): Scattered at 3100ft, Solid Overcast at 8500ft
100% chance of rain Tonight Tonight... Rain, mainly after 1am. Low around 50. South southeast wind 18 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

70% chance of rain Monday Monday... Rain likely, mainly after 11am. Mostly cloudy, with a high near 55. South southeast wind 18 to 21 mph becoming west southwest in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

90% chance of rain Monday Night Monday Night... Rain, mainly after 10pm. Low around 45. West southwest wind 6 to 8 mph becoming south southeast after midnight. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

100% chance of rain Tuesday Tuesday... Rain. High near 50. South wind 8 to 11 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

100% chance of rain Tuesday Night Tuesday Night... Rain. Low around 43. South southeast wind 10 to 14 mph becoming west southwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

80% chance of rain Wednesday Night Wednesday Night... Rain. Low around 42. Chance of precipitation is 80%.

Rain on Thursday Thursday... Rain. Cloudy, with a high near 47.

Rain on Thursday Night Thursday Night... Rain. Mostly cloudy, with a low around 41.

70% chance of rain Friday Friday... Rain likely. Mostly cloudy, with a high near 45.

Rain on Friday Night Friday Night... Rain. Mostly cloudy, with a low around 39.

Rain on Saturday Saturday... Rain. Mostly cloudy, with a high near 44.

70% chance of rain Saturday Night Saturday Night... Rain likely. Mostly cloudy, with a low around 40.

70% chance of rain Sunday Sunday... Rain likely. Mostly cloudy, with a high near 45.

Sun Almanac for Rosario, Washington
Sunrise: 07:58 AM
Sunset: 4:16 PM
Civil Sunrise:07:21 AM
Civil Sunset: 4:53 PM
Nautical Sunrise: 06:41 AM
Nautical Sunset: 5:33 PM
Astro Sunrise: 06:02 AM
Astro Sunset: 6:11 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.