Grain Valley, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grain Valley, a city in Jackson County, Missouri.
Today
94°F
Mostly Sunny
Mostly sunny, with a high near 94. Heat index values as high as 99. South wind around 6 mph.
7-day forecast for Grain Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Mostly Sunny | 6 mph S | 3% |
| Tonight | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSE | 16% |
| Wednesday | 88°F | Chance Showers And Thunderstorms | 3 to 7 mph ESE | 45% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 2 to 6 mph NNE | 82% |
| Thursday | 86°F | Showers And Thunderstorms then Partly Sunny | 3 mph NE | 82% |
| Thursday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 3 mph ESE | 18% |
| Friday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 1 to 5 mph S | 18% |
| Friday Night | 70°F | Mostly Clear | 5 mph S | 12% |
| Saturday | 92°F | Sunny | 3 to 8 mph S | 12% |
| Saturday Night | 73°F | Mostly Clear | 8 mph S | 3% |
| Sunday | 94°F | Sunny | 12 mph SSW | 2% |
| Sunday Night | 74°F | Mostly Clear | 9 mph S | 3% |
| Monday | 95°F | Sunny | 12 mph SSW | 3% |
| Monday Night | 76°F | Mostly Clear | 10 mph S | 3% |
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 Aug 4, 2026.