Grain Valley, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grain Valley, a city in Jackson County, Missouri.
This Afternoon
70°F
Chance Rain Showers
A chance of rain showers. Partly sunny. High near 70, with temperatures falling to around 60 in the afternoon. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Grain Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Chance Rain Showers | 14 mph SW | 37% |
| Tonight | 45°F | Cloudy | 7 to 10 mph WNW | 12% |
| Wednesday | 57°F | Mostly Cloudy | 7 to 12 mph W | 4% |
| Wednesday Night | 39°F | Mostly Clear | 5 mph WSW | 2% |
| Thursday | 57°F | Mostly Sunny then Slight Chance Rain Showers | 3 to 7 mph WNW | 15% |
| Thursday Night | 39°F | Mostly Cloudy | 5 mph NNW | 3% |
| Friday | 56°F | Partly Sunny | 6 mph N | 3% |
| Friday Night | 36°F | Mostly Cloudy | 2 mph N | 0% |
| Saturday | 58°F | Partly Sunny | 2 mph WNW | 4% |
| Saturday Night | 36°F | Mostly Clear | 1 mph W | 6% |
| Sunday | 64°F | Sunny | 1 to 5 mph W | 6% |
| Sunday Night | 38°F | Mostly Clear | 2 mph WSW | 0% |
| Monday | 67°F | Sunny | 2 to 8 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph SW | 0% |
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 Nov 3, 2026.