National Weather Service Forecast for: Duncan OK
Issued by: National Weather Service Norman, OK
Updated: 10:42 am CDT May 4, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. South southwest wind around 20 mph, with gusts as high as 29 mph.
Slight Chance
T-storms
 Tonight

Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 65. South wind 13 to 17 mph, with gusts as high as 26 mph.
Slight Chance
T-storms then
Partly Cloudy
 Tuesday

Tuesday: Mostly cloudy, with a high near 80. Southwest wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Mostly Cloudy

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 50. Northeast wind 10 to 14 mph, with gusts as high as 22 mph.
Mostly Cloudy

 Wednesday

Wednesday: Partly sunny, with a high near 71. North northeast wind around 11 mph.
Partly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 45.
Partly Cloudy

 Thursday

Thursday: Sunny, with a high near 73.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 49.
Mostly Clear

 Friday

Friday: Sunny, with a high near 84.
Sunny
Hi 89 °F Lo 65 °F Hi 80 °F Lo 50 °F Hi 71 °F Lo 45 °F Hi 73 °F Lo 49 °F Hi 84 °F

 

This Afternoon
 
 A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. South southwest wind around 20 mph, with gusts as high as 29 mph.
Tonight
 
 A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 65. South wind 13 to 17 mph, with gusts as high as 26 mph.
Tuesday
 
 Mostly cloudy, with a high near 80. Southwest wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 50. Northeast wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday
 
 Partly sunny, with a high near 71. North northeast wind around 11 mph.
Wednesday Night
 
 Partly cloudy, with a low around 45.
Thursday
 
 Sunny, with a high near 73.
Thursday Night
 
 Mostly clear, with a low around 49.
Friday
 
 Sunny, with a high near 84.
Friday Night
 
 Mostly clear, with a low around 57.
Saturday
 
 Sunny, with a high near 87.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 62.
Sunday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Duncan OK.