Weather Forecast for San Juan Islands
Washington, United States of America
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Current Weather - San Juan Islands: 12°C
Current Weather - San Juan Islands: 12°C
Washington, United States of America
Mist
Feels like 10°C
Wind
14 km/h SSW
Humidity
97%
Pressure
1019 mb
UV Index
0
Visibility
10 km
Sunny
Tuesday, August 18, 2026
High
23°C
Low
12°C
Rain Chance
12%
Hourly Forecast
23°C
23°C
21°C
19°C
17°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
18 km/h
Humidity
78%
Precipitation
0 mm
UV Index
6
Visibility
9 km
Rain Chance
12%
Snow Chance
0%
Sun & Moon
Sunrise
06:10 AM
Sunset
08:21 PM
Moonrise
01:48 PM
Moonset
10:29 PM
Moon Phase
First Quarter
Moon Illumination
37%
Air Quality
PM2.5
8.2
μg/m³
PM10
9.4
μg/m³
NO₂
7.7
μg/m³
O₃
61.5
μg/m³
SO₂
0.8
μg/m³
CO
124
μg/m³
Partly Cloudy
Wednesday, August 19, 2026
High
18°C
Low
12°C
Rain Chance
15%
Hourly Forecast
14°C
14°C
13°C
13°C
13°C
13°C
12°C
13°C
13°C
14°C
14°C
15°C
15°C
16°C
17°C
18°C
18°C
18°C
17°C
16°C
14°C
14°C
14°C
14°C
Day Statistics
Maximum Wind
14 km/h
Humidity
86%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
15%
Snow Chance
0%
Sun & Moon
Sunrise
06:11 AM
Sunset
08:20 PM
Moonrise
03:03 PM
Moonset
10:59 PM
Moon Phase
First Quarter
Moon Illumination
48%
Air Quality
PM2.5
9.1
μg/m³
PM10
11.1
μg/m³
NO₂
13
μg/m³
O₃
42.5
μg/m³
SO₂
1.8
μg/m³
CO
129.8
μg/m³
Sunny
Thursday, August 20, 2026
High
20°C
Low
13°C
Rain Chance
11%
Hourly Forecast
14°C
14°C
14°C
14°C
14°C
13°C
13°C
14°C
14°C
15°C
16°C
17°C
18°C
19°C
20°C
20°C
20°C
20°C
19°C
17°C
15°C
14°C
15°C
14°C
Day Statistics
Maximum Wind
13 km/h
Humidity
83%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
11%
Snow Chance
0%
Sun & Moon
Sunrise
06:12 AM
Sunset
08:18 PM
Moonrise
04:13 PM
Moonset
11:38 PM
Moon Phase
First Quarter
Moon Illumination
58%
Air Quality
PM2.5
13.9
μg/m³
PM10
15
μg/m³
NO₂
19
μg/m³
O₃
62.4
μg/m³
SO₂
3.9
μg/m³
CO
143.7
μg/m³
Partly Cloudy
Friday, August 21, 2026
High
18°C
Low
14°C
Rain Chance
42%
Hourly Forecast
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
15°C
16°C
17°C
16°C
16°C
17°C
18°C
17°C
17°C
16°C
15°C
15°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
26 km/h
Humidity
85%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
42%
Snow Chance
0%
Sun & Moon
Sunrise
06:14 AM
Sunset
08:16 PM
Moonrise
05:12 PM
Moonset
Does not set today
Moon Phase
First Quarter
Moon Illumination
69%
Air Quality
PM2.5
5.9
μg/m³
PM10
6.5
μg/m³
NO₂
7
μg/m³
O₃
60.9
μg/m³
SO₂
0.9
μg/m³
CO
115.5
μg/m³
Patchy rain nearby
Saturday, August 22, 2026
High
16°C
Low
13°C
Rain Chance
68%
Hourly Forecast
14°C
14°C
14°C
14°C
13°C
13°C
13°C
13°C
14°C
14°C
14°C
15°C
14°C
15°C
16°C
16°C
16°C
16°C
16°C
15°C
14°C
13°C
13°C
13°C
Day Statistics
Maximum Wind
26 km/h
Humidity
89%
Precipitation
2 mm
UV Index
5
Visibility
9 km
Rain Chance
68%
Snow Chance
0%
Sun & Moon
Sunrise
06:15 AM
Sunset
08:14 PM
Moonrise
06:00 PM
Moonset
12:28 AM
Moon Phase
Waxing Gibbous
Moon Illumination
78%
Air Quality
PM2.5
4.4
μg/m³
PM10
6.1
μg/m³
NO₂
4.3
μg/m³
O₃
55.7
μg/m³
SO₂
0.7
μg/m³
CO
116.8
μg/m³
Sunny
Sunday, August 23, 2026
High
19°C
Low
13°C
Rain Chance
11%
Hourly Forecast
13°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
15°C
16°C
17°C
18°C
18°C
19°C
19°C
19°C
19°C
18°C
16°C
15°C
15°C
14°C
14°C
Day Statistics
Maximum Wind
13 km/h
Humidity
84%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
11%
Snow Chance
0%
Sun & Moon
Sunrise
06:16 AM
Sunset
08:12 PM
Moonrise
06:37 PM
Moonset
01:27 AM
Moon Phase
Waxing Gibbous
Moon Illumination
86%
Cloudy
Monday, August 24, 2026
High
18°C
Low
14°C
Rain Chance
18%
Hourly Forecast
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
16°C
16°C
17°C
18°C
18°C
18°C
18°C
17°C
17°C
16°C
16°C
16°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
21 km/h
Humidity
83%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
18%
Snow Chance
0%
Sun & Moon
Sunrise
06:18 AM
Sunset
08:10 PM
Moonrise
07:04 PM
Moonset
02:32 AM
Moon Phase
Waxing Gibbous
Moon Illumination
93%
Solar Radiation Data
Shortwave Radiation
10.12
Diffuse Radiation
4.94
DNI
0
GTI
0
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