Weather Forecast for San Juan Islands
Washington, United States of America
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Current Weather - San Juan Islands: 3°C
Current Weather - San Juan Islands: 3°C
Washington, United States of America
Clear
Feels like 1°C
Wind
7 km/h NNE
Humidity
100%
Pressure
1011 mb
UV Index
0
Visibility
13 km
Patchy rain nearby
Thursday, January 01, 2026
High
6°C
Low
2°C
Rain Chance
77%
Hourly Forecast
6°C
5°C
5°C
6°C
6°C
6°C
6°C
6°C
7°C
7°C
Day Statistics
Maximum Wind
10 km/h
Humidity
87%
Precipitation
0 mm
UV Index
0
Visibility
10 km
Rain Chance
77%
Snow Chance
0%
Sun & Moon
Sunrise
08:04 AM
Sunset
04:27 PM
Moonrise
02:16 PM
Moonset
06:48 AM
Moon Phase
Waxing Gibbous
Moon Illumination
91%
Air Quality
PM2.5
15.5
μg/m³
PM10
15.7
μg/m³
NO₂
35.3
μg/m³
O₃
21.2
μg/m³
SO₂
6.1
μg/m³
CO
328
μg/m³
Patchy rain nearby
Friday, January 02, 2026
High
9°C
Low
7°C
Rain Chance
71%
Hourly Forecast
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
8°C
8°C
8°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
8°C
8°C
Day Statistics
Maximum Wind
14 km/h
Humidity
95%
Precipitation
2 mm
UV Index
0
Visibility
7 km
Rain Chance
71%
Snow Chance
0%
Sun & Moon
Sunrise
08:04 AM
Sunset
04:28 PM
Moonrise
03:25 PM
Moonset
07:59 AM
Moon Phase
Waxing Gibbous
Moon Illumination
97%
Air Quality
PM2.5
17.4
μg/m³
PM10
17.6
μg/m³
NO₂
57
μg/m³
O₃
4.3
μg/m³
SO₂
5.2
μg/m³
CO
344.5
μg/m³
Heavy rain
Saturday, January 03, 2026
High
9°C
Low
8°C
Rain Chance
89%
Hourly Forecast
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
8°C
8°C
8°C
8°C
8°C
8°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
Day Statistics
Maximum Wind
14 km/h
Humidity
92%
Precipitation
29 mm
UV Index
0
Visibility
8 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
08:04 AM
Sunset
04:30 PM
Moonrise
04:47 PM
Moonset
08:51 AM
Moon Phase
Full Moon
Moon Illumination
100%
Air Quality
PM2.5
9
μg/m³
PM10
9.3
μg/m³
NO₂
36.2
μg/m³
O₃
26.8
μg/m³
SO₂
2.8
μg/m³
CO
214.7
μg/m³
Patchy rain nearby
Sunday, January 04, 2026
High
10°C
Low
8°C
Rain Chance
89%
Hourly Forecast
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
9°C
9°C
9°C
9°C
9°C
10°C
10°C
10°C
10°C
9°C
9°C
9°C
9°C
Day Statistics
Maximum Wind
48 km/h
Humidity
86%
Precipitation
1 mm
UV Index
0
Visibility
10 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
08:04 AM
Sunset
04:31 PM
Moonrise
06:13 PM
Moonset
09:28 AM
Moon Phase
Waning Gibbous
Moon Illumination
99%
Air Quality
PM2.5
3.9
μg/m³
PM10
4.3
μg/m³
NO₂
12.8
μg/m³
O₃
63.1
μg/m³
SO₂
1.9
μg/m³
CO
166.9
μg/m³
Patchy rain nearby
Monday, January 05, 2026
High
9°C
Low
7°C
Rain Chance
86%
Hourly Forecast
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
9°C
8°C
8°C
8°C
8°C
8°C
8°C
7°C
Day Statistics
Maximum Wind
19 km/h
Humidity
90%
Precipitation
1 mm
UV Index
0
Visibility
8 km
Rain Chance
86%
Snow Chance
0%
Sun & Moon
Sunrise
08:03 AM
Sunset
04:32 PM
Moonrise
07:38 PM
Moonset
09:54 AM
Moon Phase
Waning Gibbous
Moon Illumination
96%
Air Quality
PM2.5
2
μg/m³
PM10
2.6
μg/m³
NO₂
2.6
μg/m³
O₃
85.2
μg/m³
SO₂
1.3
μg/m³
CO
139.6
μg/m³
Patchy rain nearby
Tuesday, January 06, 2026
High
7°C
Low
6°C
Rain Chance
87%
Hourly Forecast
7°C
7°C
7°C
7°C
7°C
7°C
7°C
6°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
7°C
8°C
8°C
8°C
8°C
Day Statistics
Maximum Wind
14 km/h
Humidity
90%
Precipitation
0 mm
UV Index
2
Visibility
10 km
Rain Chance
87%
Snow Chance
0%
Sun & Moon
Sunrise
08:03 AM
Sunset
04:33 PM
Moonrise
08:57 PM
Moonset
10:14 AM
Moon Phase
Waning Gibbous
Moon Illumination
91%
Patchy rain nearby
Wednesday, January 07, 2026
High
8°C
Low
7°C
Rain Chance
0%
Hourly Forecast
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
7°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
8°C
7°C
7°C
7°C
7°C
7°C
7°C
Day Statistics
Maximum Wind
12 km/h
Humidity
87%
Precipitation
0 mm
UV Index
2
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
08:03 AM
Sunset
04:34 PM
Moonrise
10:12 PM
Moonset
10:30 AM
Moon Phase
Waning Gibbous
Moon Illumination
84%
Weather Alerts
Dense Fog Advisory issued December 31 at 9:19PM PST until January 1 at 10:00AM PST by NWS Seattle WA
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Lowlands of Western Skagit and Northwestern Snohomish Counties, Lowlands of Western Whatcom County, San Juan County, and Downtown Everett / Marysville Area. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
yellow advisory - fog - in effect
Near zero visibility in fog is expected. What: Areas of fog reducing visibility to near zero. Where: East Vancouver Island, and Sunshine Coast When: Now until Thursday morning. Remarks: A ridge of high pressure has settled over Vancouver Island. Cool, humid marine air is trapped under a warm, stagnant airmass aloft. This will result in areas of dense fog for East Vancouver Island, and the Sunshine Coast tonight. Conditions are expected to improve Thursday morning when temperatures start rising and mixing near the surface helps the fog to dissipate. ### Travel will likely be hazardous in some locations. Visibility will likely be suddenly reduced at times. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to BCstorm@ec.gc.ca or post reports on X using #BCStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.
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