South Union, WA Weather Forecast
Local 7-day forecast
Chance Light Rain
Track current conditions, temperature changes, wind, and the full daily outlook for South Union, WA in one place.
A chance of rain before 3am. Mostly cloudy. Low around 45, with temperatures rising to around 47 overnight. Southwest wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for South Union, WA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 10, 2026 2:10 AM PDT.
The active forecast window currently covers Jun 10 to Jun 16, 2026 for South Union, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 10 to Jun 16, 2026
- Latest sync
- Jun 10, 2026 2:10 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in South Union
Monday looks like the warmest upcoming period in South Union at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Tuesday at about 2 to 13 mph WSW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Jun 10, 2026 2:10 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KLGX
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 66. West southwest wind around 6 mph.
Partly cloudy. Low around 41, with temperatures rising to around 43 overnight. West northwest wind 0 to 6 mph.
Sunny, with a high near 75. North wind 0 to 6 mph.
Mostly clear, with a low around 45. West northwest wind 0 to 6 mph.
Sunny, with a high near 78.
Mostly clear, with a low around 49.
Sunny, with a high near 84.
Clear, with a low around 56.
Sunny, with a high near 92.
Mostly clear, with a low around 60.
Sunny, with a high near 95.
Partly cloudy, with a low around 60.
Mostly sunny, with a high near 82.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jun 10
|
Chance Light Rain
|
45°F |
7 mph
SW
|
|
Wednesday
Jun 10
|
Mostly Sunny
|
66°F |
6 mph
WSW
|
|
Wednesday Night
Jun 10
|
Partly Cloudy
|
41°F |
0 to 6 mph
WNW
|
|
Thursday
Jun 11
|
Sunny
|
75°F |
0 to 6 mph
N
|
|
Thursday Night
Jun 11
|
Mostly Clear
|
45°F |
0 to 6 mph
WNW
|
|
Friday
Jun 12
|
Sunny
|
78°F |
0 to 6 mph
NNW
|
|
Friday Night
Jun 12
|
Mostly Clear
|
49°F |
0 to 6 mph
NW
|
|
Saturday
Jun 13
|
Sunny
|
84°F |
0 to 9 mph
NNE
|
|
Saturday Night
Jun 13
|
Clear
|
56°F |
1 to 8 mph
NE
|
|
Sunday
Jun 14
|
Sunny
|
92°F |
1 to 8 mph
NNE
|
|
Sunday Night
Jun 14
|
Mostly Clear
|
60°F |
0 to 8 mph
NNE
|
|
Monday
Jun 15
|
Sunny
|
95°F |
0 to 6 mph
NNW
|
|
Monday Night
Jun 15
|
Partly Cloudy
|
60°F |
1 to 6 mph
W
|
|
Tuesday
Jun 16
|
Mostly Sunny
|
82°F |
2 to 13 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around South Union.