Green Castle, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Castle, a city in Adair County, Missouri.
Today
89°F
Mostly Sunny
Mostly sunny, with a high near 89. South southwest wind around 7 mph.
7-day forecast for Green Castle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Mostly Sunny | 7 mph SSW | 12% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 6 mph ENE | 43% |
| Wednesday | 80°F | Showers And Thunderstorms Likely | 8 mph ENE | 71% |
| Wednesday Night | 63°F | Showers And Thunderstorms Likely | 3 to 8 mph NNE | 70% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph NE | 70% |
| Thursday Night | 63°F | Mostly Clear | 3 mph ESE | 3% |
| Friday | 85°F | Mostly Sunny | 1 to 6 mph S | 7% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph S | 16% |
| Saturday | 88°F | Sunny | 3 to 12 mph SSW | 12% |
| Saturday Night | 72°F | Mostly Clear | 9 to 14 mph S | 7% |
| Sunday | 90°F | Sunny | 12 to 17 mph SSW | 7% |
| Sunday Night | 72°F | Mostly Clear | 10 to 17 mph SSW | 13% |
| Monday | 90°F | Mostly Sunny | 12 to 17 mph SSW | 13% |
| Monday Night | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 13 to 17 mph SSW | 20% |
Forecast source: National Weather Service (api.weather.gov) for Green Castle (40.259, -92.876). Updated through the day.
Growing snapshot for Green Castle
Last spring frost
Apr 26
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
6a
More local growing data for Green Castle: nearby ZIP 63544 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Green City 5N, Mo (9 mi from Green Castle). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.