Dewey, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dewey, a city in Washington County, Oklahoma.
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.
7-day forecast for Dewey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 5 to 10 mph S | 0% |
| Tonight | 74°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Wednesday | 101°F | Partly Sunny | 5 to 10 mph S | 5% |
| Wednesday Night | 74°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 15% |
| Thursday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph S | 21% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 mph E | 55% |
| Friday | 95°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph SE | 55% |
| Friday Night | 73°F | Mostly Clear | 5 to 10 mph SE | 14% |
| Saturday | 98°F | Sunny | 5 to 10 mph S | 14% |
| Saturday Night | 75°F | Mostly Clear | 5 to 10 mph S | 3% |
| Sunday | 99°F | Sunny | 5 to 10 mph S | 2% |
| Sunday Night | 75°F | Clear | 10 mph S | 0% |
| Monday | 99°F | Sunny | 10 to 15 mph S | 1% |
| Monday Night | 77°F | Mostly Clear | 10 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Dewey (36.790, -95.934). Updated through the day.
Growing snapshot for Dewey
Last spring frost
Apr 11
First fall frost
Oct 24
Growing season
195 days
Hardiness zone
7a
More local growing data for Dewey: nearby ZIP 74029 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Bartlesville 3, Ok (7.9 mi from Dewey). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.