Jefferson, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a town in Grant County, Oklahoma.
Tonight
74°F
Mostly Clear
Mostly clear, with a low around 74. South wind around 9 mph.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 74°F | Mostly Clear | 9 mph S | 1% |
| Saturday | 101°F | Sunny | 9 to 14 mph SSW | 8% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 12 mph S | 63% |
| Sunday | 93°F | Showers And Thunderstorms Likely | 7 mph SE | 63% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 7 mph NE | 53% |
| Monday | 84°F | Chance Showers And Thunderstorms | 6 to 9 mph NNE | 25% |
| Monday Night | 57°F | Partly Cloudy | 5 to 8 mph NNE | 9% |
| Tuesday | 81°F | Mostly Sunny | 5 to 8 mph NE | 7% |
| Tuesday Night | 55°F | Partly Cloudy | 7 mph ENE | 2% |
| Wednesday | 81°F | Mostly Sunny | 3 to 7 mph E | 10% |
| Wednesday Night | 59°F | Partly Cloudy then Slight Chance Rain Showers | 6 mph E | 21% |
| Thursday | 83°F | Chance Rain Showers | 6 mph ESE | 32% |
| Thursday Night | 61°F | Chance Rain Showers | 5 mph E | 25% |
| Friday | 85°F | Chance Rain Showers | 3 to 7 mph SE | 25% |
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 19, 2026.