Duncan, OK Weather Forecast
Local 7-day forecast
Patchy Fog then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Duncan, OK in one place.
Patchy fog before 10am, then a chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 89. East southeast wind 0 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Duncan, OK 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: Jul 14, 2026 10:50 PM CDT.
The active forecast window currently covers Jul 15 to Jul 21, 2026 for Duncan, OK.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 10:50 PM CDT
- Forecast office
- OUN
- Source
- NOAA / NWS
Daily Outlook
This Week in Duncan
Monday looks like the warmest upcoming period in Duncan at 100 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Saturday at about 9 to 16 mph SSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 10:50 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- OUN
- Radar station
- KFDR
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 69. South southeast wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind 6 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind 7 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Chance of precipitation is 30%.
Mostly sunny, with a high near 94.
Mostly clear, with a low around 74.
Sunny, with a high near 98.
Clear, with a low around 75.
Sunny, with a high near 100.
Clear, with a low around 76.
Sunny, with a high near 100.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Patchy Fog then Chance Showers And Thunderstorms
|
89°F |
0 to 8 mph
ESE
|
|
Wednesday Night
Jul 15
|
Chance Showers And Thunderstorms then Mostly Clear
|
69°F |
8 mph
SSE
|
|
Thursday
Jul 16
|
Mostly Sunny then Chance Showers And Thunderstorms
|
90°F |
6 to 15 mph
SSW
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms
|
71°F |
7 to 15 mph
S
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
91°F |
8 to 15 mph
S
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
9 to 15 mph
S
|
|
Saturday
Jul 18
|
Mostly Sunny
|
94°F |
9 to 16 mph
SSW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
74°F |
10 to 16 mph
S
|
|
Sunday
Jul 19
|
Sunny
|
98°F |
9 to 16 mph
SSW
|
|
Sunday Night
Jul 19
|
Clear
|
75°F |
9 to 16 mph
SSW
|
|
Monday
Jul 20
|
Sunny
|
100°F |
9 to 15 mph
SSW
|
|
Monday Night
Jul 20
|
Clear
|
76°F |
9 to 15 mph
SSW
|
|
Tuesday
Jul 21
|
Sunny
|
100°F |
8 to 12 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Duncan.
