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Saint John, Washington Weather Forecast
Saint John, Washington Weather
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Click for Flood Watch for Saint John, Washington
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Weather Forecast for Saint John, Washington : Clark County
Issued: 2:25 pm PST Dec 16, 2025 Latitude: 45.6962278 Longitude: -122.6120416 View on Google Maps

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This Afternoon Tonight Wednesday Thursday Friday Saturday Sunday Monday
60% chance of rain on This Afternoon 100% chance of thunderstorms on Tonight 70% chance of thunderstorms on Wednesday 100% chance of rain on Thursday 90% chance of rain on Friday 70% chance of rain on Saturday 70% chance of rain on Sunday 70% chance of rain on Monday
High: 57°F Low: 42°F High: 48°F High: 55°F High: 47°F High: 46°F High: 47°F High: 48°F
Low: 40°F Low: 41°F Low: 38°F Low: 38°F Low: 40°F  
Rain Thunderstorms Thunderstorms Rain Rain Rain Rain Rain
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Current Conditions at
VANCOUVER - (KVUO)
59°
Cloudy
as of 1:53 PM PST
Rel. Humidity: 72%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: MVFR
Wind Data
10 MPH
140° Southeast
Cloud Level(s): Broken at 3000ft, Solid Overcast at 3700ft
Current Conditions at
PORTLAND - (KPDX)
61°
Cloudy
as of 1:53 PM PST
Rel. Humidity: 67%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 21 MPH
160° South
Cloud Level(s): Few at 2500ft, Scattered at 3800ft, Solid Overcast at 10000ft
Current Conditions at
SCAPPOOSE - (KSPB)
59°
Partly Cloudy
as of 2:08 PM PST
Rel. Humidity: 77%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 29.89 in.
Flight Rule: VFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Scattered at 2700ft
Current Conditions at
TROUTDALE - (KTTD)
61°
Cloudy
as of 1:53 PM PST
Rel. Humidity: 67%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
9 MPH
Gust: 16 MPH
210° Southwest
Cloud Level(s): Solid Overcast at 9500ft
60% chance of rain This Afternoon This Afternoon... Rain likely, mainly after 3pm. Mostly cloudy, with a high near 57. South wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
100% chance of thunderstorms Tonight Tonight... Rain and thunderstorms. Low around 42. Windy, with a south wind 18 to 23 mph becoming west after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
70% chance of thunderstorms Wednesday Wednesday... Rain likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of rain and thunderstorms after 4pm. Mostly cloudy, with a steady temperature around 45. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
90% chance of rain Wednesday Night Wednesday Night... Rain, mainly after 10pm. Low around 40. South southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
100% chance of rain Thursday Thursday... Rain. High near 55. East southeast wind 10 to 13 mph becoming south in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
100% chance of rain Thursday Night Thursday Night... Rain. Low around 41. Chance of precipitation is 100%.
90% chance of rain Friday Friday... Rain. High near 47. Chance of precipitation is 90%.
70% chance of rain Friday Night Friday Night... Rain likely. Mostly cloudy, with a low around 38.
70% chance of rain Saturday Saturday... Rain likely, mainly before 10am. Mostly cloudy, with a high near 46.
20% chance of rain Saturday Night Saturday Night... A chance of rain. Mostly cloudy, with a low around 38.
70% chance of rain Sunday Sunday... Rain likely. Mostly cloudy, with a high near 47.
Rain on Sunday Night Sunday Night... Rain. Mostly cloudy, with a low around 40.
70% chance of rain Monday Monday... Rain likely. Mostly cloudy, with a high near 48.
Current Radar Image


Sun Almanac for Saint John, Washington
Sunrise: 07:46 AM
Sunset: 4:27 PM
Civil Sunrise:07:11 AM
Civil Sunset: 5:01 PM
Nautical Sunrise: 06:33 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:57 AM
Astro Sunset: 6:15 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.