Smithville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithville, a city in Clay County, Missouri.
Today
92°F
Mostly Sunny
Mostly sunny, with a high near 92. Heat index values as high as 96. South wind around 6 mph.
7-day forecast for Smithville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Mostly Sunny | 6 mph S | 12% |
| Tonight | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph E | 22% |
| Wednesday | 85°F | Chance Showers And Thunderstorms | 8 mph NE | 50% |
| Wednesday Night | 66°F | Showers And Thunderstorms Likely | 3 to 8 mph NNE | 71% |
| Thursday | 84°F | Showers And Thunderstorms Likely then Partly Sunny | 5 mph ENE | 71% |
| Thursday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph ESE | 16% |
| Friday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 2 to 6 mph SSE | 16% |
| Friday Night | 71°F | Mostly Clear | 5 mph S | 14% |
| Saturday | 92°F | Sunny | 3 to 9 mph S | 12% |
| Saturday Night | 75°F | Mostly Clear | 10 mph S | 2% |
| Sunday | 95°F | Sunny | 14 mph SSW | 1% |
| Sunday Night | 76°F | Mostly Clear | 13 mph S | 5% |
| Monday | 96°F | Mostly Sunny | 12 to 15 mph SSW | 5% |
| Monday Night | 77°F | Partly Cloudy | 13 mph SSW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Smithville (39.397, -94.571). Updated through the day.
Growing snapshot for Smithville
Last spring frost
Apr 18
First fall frost
Oct 20
Growing season
183 days
Hardiness zone
6a
More local growing data for Smithville: nearby ZIP 64089 weather · frost dates · planting calendar · Missouri frost dates
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Climate data from the nearest NOAA station, Smithville Lake, Mo (0.8 mi from Smithville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.