Smithville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithville, a city in Clay County, Missouri.
This Afternoon
93°F
Mostly Sunny
Mostly sunny, with a high near 93. Heat index values as high as 100. South southwest wind around 10 mph.
7-day forecast for Smithville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 93°F | Mostly Sunny | 10 mph SSW | 2% |
| Tonight | 76°F | Partly Cloudy | 5 to 9 mph S | 5% |
| Saturday | 93°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 8 to 13 mph SSW | 15% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 8 mph NW | 71% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 3 to 9 mph N | 44% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 6 to 9 mph NNE | 56% |
| Monday | 70°F | Chance Rain Showers | 7 to 10 mph NNE | 54% |
| Monday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 10 mph NNE | 15% |
| Tuesday | 67°F | Mostly Cloudy | 9 mph NNE | 7% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 8 mph NE | 5% |
| Wednesday | 70°F | Mostly Sunny | 6 mph ENE | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph ENE | 6% |
| Thursday | 73°F | Slight Chance Rain Showers | 5 mph E | 17% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 5 mph E | 18% |
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 Sep 19, 2026.