Duncan, WA Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Duncan, WA in one place.
Patchy fog before 7am. Sunny, with a high near 72. Northeast wind 2 to 6 mph.
Local Weather Overview
This forecast page for Duncan, 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: Sep 14, 2026 9:42 PM PDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Duncan, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 9:42 PM PDT
- Forecast office
- OTX
- Source
- NOAA / NWS
Daily Outlook
This Week in Duncan
Sunday looks like the warmest upcoming period in Duncan at 77 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Wednesday at about 2 to 6 mph NE.
The forecast from Sep 16 through Sep 21 stays mostly dry.
Forecast Details
- Last updated
- Sep 14, 2026 9:42 PM PDT
- Coverage
- 6 days
- Time zone
- America/Los_Angeles
- Forecast office
- OTX
- Radar station
- KOTX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 46. Northeast wind 1 to 6 mph.
Sunny, with a high near 76.
Partly cloudy, with a low around 48.
Sunny, with a high near 74.
Mostly clear, with a low around 48.
Sunny, with a high near 75.
Mostly clear, with a low around 48.
Sunny, with a high near 77.
Mostly clear, with a low around 48.
Mostly sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Patchy Fog then Sunny
|
72°F |
2 to 6 mph
NE
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
46°F |
1 to 6 mph
NE
|
|
Thursday
Sep 17
|
Sunny
|
76°F |
3 mph
N
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
48°F |
3 mph
SW
|
|
Friday
Sep 18
|
Sunny
|
74°F |
1 to 5 mph
S
|
|
Friday Night
Sep 18
|
Mostly Clear
|
48°F |
3 mph
S
|
|
Saturday
Sep 19
|
Sunny
|
75°F |
5 mph
S
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
48°F |
3 mph
SE
|
|
Sunday
Sep 20
|
Sunny
|
77°F |
3 mph
SE
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
48°F |
2 mph
SE
|
|
Monday
Sep 21
|
Mostly Sunny
|
77°F |
5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Duncan.