Dewey, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dewey, a city in Washington County, Oklahoma.
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 102. South wind around 10 mph, with gusts as high as 25 mph.
7-day forecast for Dewey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 10 mph S | 1% |
| Tonight | 72°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 34% |
| Sunday | 88°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph SE | 61% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NE | 64% |
| Monday | 81°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 60% |
| Monday Night | 59°F | Partly Cloudy | 5 to 10 mph N | 5% |
| Tuesday | 77°F | Mostly Sunny | 10 mph NE | 5% |
| Tuesday Night | 55°F | Mostly Clear | 5 to 10 mph NE | 1% |
| Wednesday | 79°F | Mostly Sunny | 5 mph NE | 3% |
| Wednesday Night | 57°F | Mostly Clear | 5 mph NE | 4% |
| Thursday | 81°F | Slight Chance Rain Showers | 0 to 5 mph E | 15% |
| Thursday Night | 61°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph E | 15% |
| Friday | 83°F | Slight Chance Rain Showers | 5 mph E | 24% |
| Friday Night | 61°F | Partly Cloudy | 5 mph E | 13% |
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 Sep 19, 2026.