National Weather Service Forecast for: Duncan OK
Issued by: National Weather Service Norman, OK
Updated: 1:26 am CDT Jun 30, 2026
 
Overnight

Overnight: Clear, with a low around 76. South wind around 15 mph, with gusts as high as 23 mph.
Clear
 Tuesday

Tuesday: Sunny, with a high near 95. South wind 13 to 16 mph, with gusts as high as 24 mph.
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 75. South southeast wind 11 to 16 mph, with gusts as high as 24 mph.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 94. Heat index values as high as 97. South wind 10 to 14 mph, with gusts as high as 21 mph.
Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 76. South southeast wind 9 to 14 mph, with gusts as high as 21 mph.
Partly Cloudy
 Thursday

Thursday: Mostly sunny, with a high near 96.
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 77.
Partly Cloudy
 Friday

Friday: Mostly sunny and hot, with a high near 97.
Hot
 Friday
Night
Friday Night: Mostly clear, with a low around 77.
Mostly Clear
Lo 76 °F Hi 95 °F Lo 75 °F Hi 94 °F Lo 76 °F Hi 96 °F Lo 77 °F Hi 97 °F Lo 77 °F

 

Overnight
 
 Clear, with a low around 76. South wind around 15 mph, with gusts as high as 23 mph.
Tuesday
 
 Sunny, with a high near 95. South wind 13 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
 
 Mostly clear, with a low around 75. South southeast wind 11 to 16 mph, with gusts as high as 24 mph.
Wednesday
 
 Sunny, with a high near 94. Heat index values as high as 97. South wind 10 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
 
 Partly cloudy, with a low around 76. South southeast wind 9 to 14 mph, with gusts as high as 21 mph.
Thursday
 
 Mostly sunny, with a high near 96.
Thursday Night
 
 Partly cloudy, with a low around 77.
Friday
 
 Mostly sunny and hot, with a high near 97.
Friday Night
 
 Mostly clear, with a low around 77.
Independence Day
 
 Mostly sunny and hot, with a high near 100.
Saturday Night
 
 Partly cloudy, with a low around 77.
Sunday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.

 

Forecast from NOAA-NWS for Duncan OK.