San Juan County, WA Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across San Juan County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a low around 51. South southwest wind around 5 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
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:23 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in San Juan County
Tuesday looks like the warmest upcoming period in San Juan County at 82 degrees F.
Overnight is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Friday at about 7 mph S.
The forecast from Jul 17 through Jul 23 stays mostly dry.
Forecast Details
- Last updated
- Jul 17, 2026 6:23 AM 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
Mostly sunny, with a high near 70. South wind around 7 mph.
Mostly clear, with a low around 52. Southwest wind around 6 mph.
Mostly sunny, with a high near 71. South southwest wind around 7 mph.
Patchy fog after 3am. Mostly clear, with a low around 51. West wind around 6 mph.
Sunny, with a high near 74.
Mostly clear, with a low around 53.
Sunny, with a high near 79.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 82.
Partly cloudy, with a low around 56.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 56.
Sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 17
|
Mostly Cloudy
|
51°F |
5 mph
SSW
|
|
Friday
Jul 17
|
Mostly Sunny
|
70°F |
7 mph
S
|
|
Friday Night
Jul 17
|
Mostly Clear
|
52°F |
6 mph
SW
|
|
Saturday
Jul 18
|
Mostly Sunny
|
71°F |
7 mph
SSW
|
|
Saturday Night
Jul 18
|
Mostly Clear then Patchy Fog
|
51°F |
6 mph
W
|
|
Sunday
Jul 19
|
Sunny
|
74°F |
3 to 7 mph
NNW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
53°F |
0 to 3 mph
W
|
|
Monday
Jul 20
|
Sunny
|
79°F |
0 to 5 mph
NW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
55°F |
0 to 3 mph
W
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
82°F |
0 to 3 mph
W
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
56°F |
0 to 3 mph
SW
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
81°F |
0 to 5 mph
WSW
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
56°F |
3 mph
SW
|
|
Thursday
Jul 23
|
Sunny
|
80°F |
1 to 5 mph
SW
|
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.