Duncan, OK Weather & Growing Conditions
Tonight
73°F
Mostly Clear
Mostly clear, with a low around 73. South southeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Mostly Clear | 8 mph SSE | 0% |
| Saturday | 99°F | Sunny | 8 to 12 mph SSW | 1% |
| Saturday Night | 74°F | Mostly Clear | 12 mph S | 11% |
| Sunday | 98°F | Showers And Thunderstorms Likely | 8 to 12 mph SSW | 58% |
| Sunday Night | 67°F | Showers And Thunderstorms Likely | 3 to 9 mph ESE | 69% |
| Monday | 91°F | Chance Rain Showers | 5 to 8 mph NE | 38% |
| Monday Night | 64°F | Mostly Clear then Slight Chance Rain Showers | 9 mph NE | 17% |
| Tuesday | 87°F | Slight Chance Rain Showers then Mostly Sunny | 12 mph NE | 17% |
| Tuesday Night | 62°F | Partly Cloudy | 7 to 10 mph NE | 5% |
| Wednesday | 88°F | Mostly Sunny | 8 mph ENE | 12% |
| Wednesday Night | 64°F | Partly Cloudy | 8 mph ENE | 6% |
| Thursday | 89°F | Slight Chance Rain Showers | 7 mph E | 21% |
| Thursday Night | 65°F | Partly Cloudy | 7 mph ENE | 8% |
| Friday | 90°F | Partly Sunny | 8 mph ESE | 9% |
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 Sep 19, 2026.