Fort Supply, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Supply, a town in Ellis County, Oklahoma.
Today
102°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 102. Heat index values as high as 99. South wind 10 to 14 mph, with gusts as high as 21 mph.
7-day forecast for Fort Supply
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 102°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 to 14 mph S | 12% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms | 6 to 13 mph SW | 12% |
| Wednesday | 101°F | Slight Chance Showers And Thunderstorms | 6 to 13 mph SW | 12% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms | 7 to 13 mph ESE | 22% |
| Thursday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 13 mph ESE | 23% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 9 to 13 mph SSE | 44% |
| Friday | 100°F | Slight Chance Showers And Thunderstorms | 12 mph S | 19% |
| Friday Night | 72°F | Mostly Clear | 13 mph S | 13% |
| Saturday | 101°F | Sunny | 9 to 13 mph S | 8% |
| Saturday Night | 75°F | Clear | 15 mph S | 0% |
| Sunday | 102°F | Sunny | 16 mph SSW | 0% |
| Sunday Night | 75°F | Mostly Clear | 17 mph S | 0% |
| Monday | 102°F | Sunny | 18 mph SSW | 0% |
| Monday Night | 76°F | Mostly Clear | 18 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Fort Supply (36.572, -99.574). Updated through the day.
Growing snapshot for Fort Supply
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
179 days
Hardiness zone
7a
More local growing data for Fort Supply: nearby ZIP 73841 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ft Supply 3Se, Ok (4.7 mi from Fort Supply). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.