Grain Valley, MO Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Grain Valley, MO in one place.
A slight chance of rain showers between 7am and 4pm. Partly sunny, with a high near 87. North northwest wind 2 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Grain Valley, MO is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 25, 2026 8:06 PM CDT.
The active forecast window currently covers Aug 26 to Sep 1, 2026 for Grain Valley, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 26 to Sep 1, 2026
- Latest sync
- Aug 25, 2026 8:06 PM CDT
- Forecast office
- EAX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grain Valley
Sunday looks like the warmest upcoming period in Grain Valley at 94 degrees F.
Thursday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Sunday at about 13 mph SSW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 25, 2026 8:06 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- EAX
- Radar station
- KEAX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 63. North northwest wind 1 to 6 mph.
Mostly sunny, with a high near 86. North wind 1 to 6 mph.
Clear, with a low around 61. East northeast wind 0 to 5 mph.
Sunny, with a high near 86.
Mostly clear, with a low around 64.
Mostly sunny, with a high near 90.
Partly cloudy, with a low around 72.
Mostly sunny, with a high near 94.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 92.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 71. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 91.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Aug 26
|
Slight Chance Rain Showers
|
87°F |
2 to 8 mph
NNW
|
|
Wednesday Night
Aug 26
|
Mostly Clear
|
63°F |
1 to 6 mph
NNW
|
|
Thursday
Aug 27
|
Mostly Sunny
|
86°F |
1 to 6 mph
N
|
|
Thursday Night
Aug 27
|
Clear
|
61°F |
0 to 5 mph
ENE
|
|
Friday
Aug 28
|
Sunny
|
86°F |
0 to 3 mph
ESE
|
|
Friday Night
Aug 28
|
Mostly Clear
|
64°F |
5 mph
SE
|
|
Saturday
Aug 29
|
Mostly Sunny
|
90°F |
6 to 10 mph
S
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
72°F |
7 to 12 mph
S
|
|
Sunday
Aug 30
|
Mostly Sunny
|
94°F |
13 mph
SSW
|
|
Sunday Night
Aug 30
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
74°F |
10 mph
S
|
|
Monday
Aug 31
|
Slight Chance Showers And Thunderstorms
|
92°F |
6 to 10 mph
S
|
|
Monday Night
Aug 31
|
Chance Showers And Thunderstorms
|
71°F |
6 mph
SE
|
|
Tuesday
Sep 1
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
91°F |
7 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grain Valley.