Grain Valley, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grain Valley, a city in Jackson County, Missouri.
Overnight
75°F
Mostly Clear
Mostly clear, with a low around 75. South southwest wind 5 to 8 mph.
7-day forecast for Grain Valley
| 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) for Grain Valley (39.015, -94.216). Updated through the day.
Growing snapshot for Grain Valley
Last spring frost
Apr 7
First fall frost
Oct 29
Growing season
202 days
Hardiness zone
6b
More local growing data for Grain Valley: nearby ZIP 64029 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Blue Springs
Blue Summit
Buckner
Grandview
Greenwood
Independence
Kansas City
Lake Lotawana
Lake Tapawingo
Lake Winnebago
Lee's Summit
Levasy
Lone Jack
Oak Grove
Randolph
Raytown
Sibley
Sugar Creek
Tarsney Lakes
Unity Village
Climate data from the nearest NOAA station, Lees Summit Muni Ap, Mo (8.9 mi from Grain Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.