Grayson, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grayson, a community in Clinton County, Missouri.
Overnight
68°F
Partly Cloudy
Partly cloudy, with a low around 68. South southeast wind around 6 mph.
7-day forecast for Grayson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Partly Cloudy | 6 mph SSE | 0% |
| Tuesday | 91°F | Mostly Sunny | 6 mph SSE | 12% |
| Tuesday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 mph E | 29% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 8 mph NE | 56% |
| Wednesday Night | 65°F | Showers And Thunderstorms Likely | 5 to 9 mph NNE | 69% |
| Thursday | 83°F | Showers And Thunderstorms Likely then Mostly Sunny | 6 mph ENE | 69% |
| Thursday Night | 67°F | Partly Cloudy | 5 mph ESE | 13% |
| Friday | 88°F | Mostly Sunny | 3 to 7 mph S | 13% |
| Friday Night | 70°F | Slight Chance Showers And Thunderstorms | 6 mph SSE | 15% |
| Saturday | 92°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 74°F | Mostly Clear | 12 mph S | 2% |
| Sunday | 94°F | Sunny | 10 to 14 mph SSW | 1% |
| Sunday Night | 75°F | Mostly Clear | 13 mph S | 5% |
| Monday | 95°F | Mostly Sunny | 12 to 15 mph SSW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Grayson (39.534, -94.562). Updated through the day.
Growing snapshot for Grayson
Last spring frost
Apr 18
First fall frost
Oct 20
Growing season
183 days
Hardiness zone
6a
More local growing data for Grayson: nearby ZIP 64492 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Smithville Lake, Mo (6.3 mi from Grayson). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.