Helena, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helena, a town in Alfalfa County, Oklahoma.
Today
105°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 105. Heat index values as high as 102. South wind around 12 mph.
7-day forecast for Helena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 105°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 12 mph S | 12% |
| Tonight | 75°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph S | 12% |
| Wednesday | 103°F | Slight Chance Showers And Thunderstorms | 12 mph SW | 12% |
| Wednesday Night | 72°F | Slight Chance Showers And Thunderstorms | 10 mph ENE | 13% |
| Thursday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 9 mph WNW | 24% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 9 mph SE | 48% |
| Friday | 99°F | Chance Showers And Thunderstorms | 8 to 12 mph SSE | 40% |
| Friday Night | 72°F | Mostly Clear | 10 mph SSE | 11% |
| Saturday | 101°F | Sunny | 8 to 12 mph S | 10% |
| Saturday Night | 74°F | Clear | 13 mph S | 2% |
| Sunday | 102°F | Sunny | 12 to 15 mph S | 1% |
| Sunday Night | 75°F | Clear | 15 mph S | 0% |
| Monday | 102°F | Sunny | 17 mph SSW | 0% |
| Monday Night | 76°F | Mostly Clear | 14 to 17 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Helena (36.546, -98.272). Updated through the day.
Growing snapshot for Helena
Last spring frost
Apr 9
First fall frost
Oct 31
Growing season
205 days
Hardiness zone
7a
More local growing data for Helena: nearby ZIP 73741 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Helena 1 Sse, Ok (1.1 mi from Helena). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.