San Juan County, WA Weather Forecast
County weather hub
Partly Sunny
Compare major city weather across San Juan County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Partly sunny. High near 65, with temperatures falling to around 61 in the afternoon. South southeast wind 0 to 3 mph.
County Weather Overview
This county weather page brings together forecast coverage for San Juan County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 0 of 0 mapped cities in San Juan County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 1:39 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in San Juan County
Friday looks like the warmest upcoming period in San Juan County at 65 degrees F.
Saturday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Saturday at about 5 to 13 mph WSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 1:39 PM 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
Rain likely after midnight. Mostly cloudy, with a low around 49. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain before 11am. Mostly sunny, with a high near 61. West southwest wind 5 to 13 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 42.
Partly sunny, with a high near 56.
Mostly cloudy, with a low around 44.
A slight chance of rain after 5pm. Mostly cloudy, with a high near 56.
A slight chance of rain before 11pm. Mostly cloudy, with a low around 44.
Mostly sunny, with a high near 56.
Partly cloudy, with a low around 43.
A slight chance of rain after 5pm. Mostly sunny, with a high near 56.
A chance of rain. Mostly cloudy, with a low around 43.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Partly Sunny
|
65°F |
0 to 3 mph
SSE
|
|
Friday Night
Oct 16
|
Mostly Cloudy then Light Rain Likely
|
49°F |
5 mph
SSW
|
|
Saturday
Oct 17
|
Slight Chance Light Rain then Mostly Sunny
|
61°F |
5 to 13 mph
WSW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
42°F |
0 to 7 mph
WSW
|
|
Sunday
Oct 18
|
Partly Sunny
|
56°F |
0 to 6 mph
N
|
|
Sunday Night
Oct 18
|
Mostly Cloudy
|
44°F |
0 to 5 mph
N
|
|
Monday
Oct 19
|
Mostly Cloudy then Slight Chance Light Rain
|
56°F |
0 to 5 mph
ESE
|
|
Monday Night
Oct 19
|
Slight Chance Light Rain then Mostly Cloudy
|
44°F |
0 to 3 mph
N
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
56°F |
1 to 8 mph
NNW
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
43°F |
0 to 5 mph
NNW
|
|
Wednesday
Oct 21
|
Mostly Sunny then Slight Chance Light Rain
|
56°F |
0 to 3 mph
SSE
|
|
Wednesday Night
Oct 21
|
Chance Light Rain
|
43°F |
3 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around San Juan County.
Nearby forecast pages are not available for this location yet.
Coverage
Forecast coverage currently spans 0 of 0 mapped cities in San Juan County.