Grayson, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grayson, a community in Clinton County, Missouri.
Tonight
45°F
Cloudy
Cloudy, with a low around 45. West northwest wind 12 to 15 mph, with gusts as high as 23 mph.
7-day forecast for Grayson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Cloudy | 12 to 15 mph WNW | 10% |
| Wednesday | 56°F | Mostly Cloudy | 9 to 14 mph W | 7% |
| Wednesday Night | 39°F | Mostly Clear | 7 mph W | 2% |
| Thursday | 56°F | Mostly Sunny then Slight Chance Rain Showers | 6 to 10 mph WNW | 17% |
| Thursday Night | 39°F | Mostly Cloudy | 7 mph NNW | 5% |
| Friday | 55°F | Partly Sunny | 7 mph N | 4% |
| Friday Night | 36°F | Mostly Cloudy | 0 to 3 mph NNW | 0% |
| Saturday | 58°F | Partly Sunny | 1 to 5 mph WSW | 2% |
| Saturday Night | 37°F | Mostly Clear | 3 mph WSW | 7% |
| Sunday | 63°F | Sunny | 6 mph W | 6% |
| Sunday Night | 39°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 67°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 68°F | Mostly Sunny | 6 mph ENE | 0% |
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 Nov 4, 2026.