Rosston, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosston, a town in Harper County, Oklahoma.
This Afternoon
99°F
Mostly Sunny
Mostly sunny, with a high near 99. Heat index values as high as 98. South southwest wind around 17 mph, with gusts as high as 26 mph.
7-day forecast for Rosston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Mostly Sunny | 17 mph SSW | 0% |
| Tonight | 75°F | Mostly Clear | 16 mph S | 2% |
| Saturday | 99°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 15 mph SW | 20% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 7 to 14 mph S | 33% |
| Sunday | 87°F | Chance Rain Showers then Partly Sunny | 7 to 10 mph NNE | 33% |
| Sunday Night | 61°F | Slight Chance Showers And Thunderstorms | 6 to 12 mph NNE | 23% |
| Monday | 82°F | Slight Chance Rain Showers then Partly Sunny | 8 mph NE | 23% |
| Monday Night | 59°F | Partly Cloudy | 8 mph E | 10% |
| Tuesday | 78°F | Slight Chance Rain Showers | 8 mph E | 15% |
| Tuesday Night | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 9 mph ESE | 22% |
| Wednesday | 81°F | Chance Rain Showers | 9 mph SE | 31% |
| Wednesday Night | 62°F | Chance Rain Showers | 8 mph SE | 49% |
| Thursday | 82°F | Chance Rain Showers | 8 mph SSE | 49% |
| Thursday Night | 63°F | Chance Rain Showers | 5 to 8 mph SSE | 49% |
Forecast source: National Weather Service (api.weather.gov) for Rosston (36.813, -99.933). Updated through the day.
Growing snapshot for Rosston
Last spring frost
Apr 13
First fall frost
Oct 28
Growing season
196 days
Hardiness zone
7a
More local growing data for Rosston: nearby ZIP 73855 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Gate, Ok (11.4 mi from Rosston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.