Jefferson, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a town in Grant County, Oklahoma.
This Afternoon
101°F
Mostly Sunny
Mostly sunny, with a high near 101. Heat index values as high as 104. South wind around 16 mph, with gusts as high as 24 mph.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 101°F | Mostly Sunny | 16 mph S | 3% |
| Tonight | 72°F | Chance Showers And Thunderstorms | 6 to 15 mph SE | 51% |
| Sunday | 92°F | Chance Showers And Thunderstorms | 5 to 8 mph ENE | 29% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 5 to 10 mph NNE | 29% |
| Monday | 85°F | Slight Chance Rain Showers then Partly Sunny | 9 mph N | 22% |
| Monday Night | 57°F | Mostly Clear | 5 to 9 mph NE | 2% |
| Tuesday | 81°F | Mostly Sunny | 5 to 8 mph NE | 2% |
| Tuesday Night | 55°F | Mostly Clear | 5 to 8 mph ENE | 1% |
| Wednesday | 82°F | Mostly Sunny | 7 mph E | 5% |
| Wednesday Night | 58°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 3 to 7 mph ESE | 16% |
| Thursday | 86°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph SE | 37% |
| Thursday Night | 63°F | Slight Chance Showers And Thunderstorms | 5 mph ESE | 40% |
| Friday | 88°F | Chance Showers And Thunderstorms | 3 to 7 mph ESE | 40% |
| Friday Night | 65°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 mph E | 17% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson (36.720, -97.791). Updated through the day.
Growing snapshot for Jefferson
Last spring frost
Apr 18
First fall frost
Oct 20
Growing season
183 days
Hardiness zone
7a
More local growing data for Jefferson: nearby ZIP 73766 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Jefferson 3Se, Ok (5.6 mi from Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.