Cromwell, OK Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cromwell, a town in Seminole County, Oklahoma.
Tonight
73°F
Mostly Clear
Mostly clear, with a low around 73. South wind around 6 mph.
7-day forecast for Cromwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Mostly Clear | 6 mph S | 0% |
| Saturday | 99°F | Sunny | 6 to 10 mph SSW | 1% |
| Saturday Night | 73°F | Partly Cloudy | 9 mph S | 11% |
| Sunday | 96°F | Chance Showers And Thunderstorms | 8 mph S | 57% |
| Sunday Night | 66°F | Showers And Thunderstorms Likely | 2 to 6 mph WSW | 74% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph NNE | 61% |
| Monday Night | 63°F | Partly Cloudy | 6 mph NNE | 10% |
| Tuesday | 84°F | Mostly Sunny | 8 mph NNE | 13% |
| Tuesday Night | 60°F | Partly Cloudy | 7 mph NE | 4% |
| Wednesday | 85°F | Mostly Sunny | 6 mph NE | 10% |
| Wednesday Night | 61°F | Partly Cloudy | 5 mph NE | 6% |
| Thursday | 86°F | Mostly Sunny | 5 mph ENE | 10% |
| Thursday Night | 63°F | Partly Cloudy | 5 mph ENE | 8% |
| Friday | 86°F | Partly Sunny | 6 mph ESE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Cromwell (35.341, -96.460). Updated through the day.
Growing snapshot for Cromwell
Last spring frost
Mar 24
First fall frost
Nov 9
Growing season
229 days
Hardiness zone
7b
More local growing data for Cromwell: nearby ZIP 74837 weather · frost dates · planting calendar · Oklahoma frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Okemah, Ok (10.3 mi from Cromwell). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.