Grain Valley, MO Weather & Growing Conditions
Overnight
75°F
Mostly Clear
Mostly clear, with a low around 75. South southwest wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 75°F | Mostly Clear | 5 to 8 mph SSW | 0% |
| Saturday | 96°F | Mostly Sunny | 8 to 13 mph SSW | 1% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 2 to 9 mph WSW | 60% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 2 to 6 mph N | 49% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 3 to 7 mph NNE | 72% |
| Monday | 71°F | Showers And Thunderstorms Likely | 5 to 8 mph NNE | 72% |
| Monday Night | 55°F | Mostly Cloudy | 5 to 8 mph NNE | 8% |
| Tuesday | 68°F | Partly Sunny | 8 mph NNE | 6% |
| Tuesday Night | 50°F | Partly Cloudy | 2 to 7 mph NE | 2% |
| Wednesday | 71°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph ENE | 5% |
| Thursday | 75°F | Slight Chance Rain Showers | 0 to 5 mph E | 20% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 3 mph E | 20% |
| Friday | 75°F | Chance Rain Showers | 2 to 6 mph E | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grain Valley, MO
Last spring frost
Apr 7
First fall frost
Oct 29
Growing season
202 days
Hardiness zone
6b
Explore more for Grain Valley, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Lees Summit Muni Ap, Mo (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.