Wynona, OK Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 101. South wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 10 mph S | 0% |
| Tonight | 74°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Wednesday | 100°F | Partly Sunny | 10 mph S | 7% |
| Wednesday Night | 75°F | Partly Cloudy | 5 to 10 mph SE | 11% |
| Thursday | 97°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph S | 19% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SE | 55% |
| Friday | 94°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph SE | 55% |
| Friday Night | 73°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 10 mph S | 18% |
| Saturday | 96°F | Sunny | 5 to 10 mph S | 14% |
| Saturday Night | 75°F | Mostly Clear | 10 mph S | 3% |
| Sunday | 97°F | Sunny | 10 to 15 mph S | 2% |
| Sunday Night | 75°F | Clear | 10 mph S | 1% |
| Monday | 97°F | Sunny | 10 to 15 mph S | 1% |
| Monday Night | 76°F | Mostly Clear | 10 to 15 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Wynona, OK
Last spring frost
Mar 31
First fall frost
Oct 31
Growing season
212 days
Hardiness zone
7a
Explore more for Wynona, OK: full frost dates · planting calendar · Oklahoma frost dates
Climate data from the nearest NOAA station, Barnsdall, Ok (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.