| National Weather Service Forecast for:
Duncan OK Issued by: National Weather Service Norman, OK |
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| Updated: 1:26 am CDT Aug 20, 2026 | ||||||||||||||||||
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| Overnight |
Partly cloudy, with a low around 77. South wind around 6 mph. |
| Thursday |
Mostly sunny and hot, with a high near 106. Light and variable wind becoming west southwest 5 to 7 mph in the morning. |
| Thursday Night |
A 20 percent chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph. |
| Friday |
Sunny and hot, with a high near 108. Light and variable wind becoming south southwest 5 to 7 mph in the morning. |
| Friday Night |
Mostly clear, with a low around 77. South southeast wind around 7 mph. |
| Saturday |
Sunny and hot, with a high near 107. |
| Saturday Night |
Partly cloudy, with a low around 76. |
| Sunday |
Sunny and hot, with a high near 105. |
| Sunday Night |
Mostly clear, with a low around 78. |
| Monday |
Sunny and hot, with a high near 108. |
| Monday Night |
Mostly clear, with a low around 78. |
| Tuesday |
Sunny and hot, with a high near 106. |
| Tuesday Night |
Mostly clear, with a low around 75. |
| Wednesday |
Sunny and hot, with a high near 103. |
Forecast from NOAA-NWS for Duncan OK.
