Duncan, OK Weather & Growing Conditions
This Afternoon
67°F
Mostly Sunny
Mostly sunny, with a high near 67. Northwest wind 13 to 16 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Sunny | 13 to 16 mph NW | 0% |
| Tonight | 46°F | Mostly Clear | 3 to 10 mph NW | 0% |
| Wednesday | 68°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph SSE | 0% |
| Thursday | 68°F | Mostly Sunny | 6 to 14 mph WSW | 14% |
| Thursday Night | 44°F | Mostly Clear | 6 to 13 mph N | 13% |
| Friday | 65°F | Sunny | 8 mph N | 0% |
| Friday Night | 42°F | Mostly Clear | 2 to 6 mph NNE | 0% |
| Saturday | 65°F | Mostly Sunny | 5 mph N | 2% |
| Saturday Night | 42°F | Mostly Clear | 2 mph NNW | 3% |
| Sunday | 68°F | Sunny | 5 mph WNW | 1% |
| Sunday Night | 42°F | Clear | 3 mph S | 1% |
| Monday | 70°F | Sunny | 3 to 9 mph S | 1% |
| Monday Night | 46°F | Mostly Clear | 6 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Duncan, OK
Last spring frost
Mar 25
First fall frost
Nov 7
Growing season
225 days
Hardiness zone
8a
Explore more for Duncan, OK: full frost dates · planting calendar · Oklahoma frost dates
Climate data from the nearest NOAA station, Duncan, Ok (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.