Grandfield, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grandfield, a city in Tillman County, Oklahoma.
Tonight
77°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 1am and 4am. Mostly cloudy, with a low around 77. South wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
7-day forecast for Grandfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 77°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 14 mph S | 16% |
| Sunday | 101°F | Slight Chance Showers And Thunderstorms | 10 to 14 mph SSW | 49% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 9 mph ESE | 58% |
| Monday | 92°F | Rain Showers Likely then Partly Sunny | 12 mph NE | 58% |
| Monday Night | 65°F | Partly Cloudy then Slight Chance Rain Showers | 12 mph NE | 20% |
| Tuesday | 89°F | Slight Chance Rain Showers | 13 mph NE | 20% |
| Tuesday Night | 63°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 13 mph ENE | 18% |
| Wednesday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 8 to 12 mph E | 18% |
| Wednesday Night | 65°F | Partly Cloudy | 9 mph E | 4% |
| Thursday | 94°F | Partly Sunny | 8 mph SE | 8% |
| Thursday Night | 68°F | Mostly Cloudy then Slight Chance Rain Showers | 9 mph ESE | 20% |
| Friday | 94°F | Slight Chance Rain Showers then Partly Sunny | 9 mph SE | 20% |
| Friday Night | 69°F | Mostly Cloudy | 10 mph E | 10% |
| Saturday | 96°F | Partly Sunny | 9 mph SE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Grandfield (34.231, -98.687). Updated through the day.
Growing snapshot for Grandfield
Last spring frost
Mar 31
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
8a
More local growing data for Grandfield: nearby ZIP 73546 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grandfield 3W Mesonet, Ok (1.6 mi from Grandfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.