Grainville, OK Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Grainville, OK in one place.
A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 96. Heat index values as high as 101. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Grainville, OK 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: Sep 14, 2026 7:25 AM CDT.
The active forecast window currently covers Sep 15 to Sep 20, 2026 for Grainville, OK.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 7:25 AM CDT
- Forecast office
- OUN
- Source
- NOAA / NWS
Daily Outlook
This Week in Grainville
Tuesday looks like the warmest upcoming period in Grainville at 96 degrees F.
Saturday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Tuesday at about 14 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 7:25 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- OUN
- Radar station
- KVNX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 94. Chance of precipitation is 20%.
Mostly clear, with a low around 72.
Sunny, with a high near 93.
Mostly clear, with a low around 72.
Sunny, with a high near 91.
A slight chance of rain showers after 1am. Mostly clear, with a low around 70. Chance of precipitation is 20%.
A chance of rain showers. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 40%.
A chance of rain showers. Partly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
96°F |
14 mph
S
|
|
Tuesday Night
Sep 15
|
Chance Showers And Thunderstorms
|
72°F |
7 to 10 mph
SE
|
|
Wednesday
Sep 16
|
Slight Chance Rain Showers then Mostly Sunny
|
94°F |
7 to 13 mph
S
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
72°F |
7 to 10 mph
SSE
|
|
Thursday
Sep 17
|
Sunny
|
93°F |
6 to 10 mph
S
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
72°F |
9 mph
SSE
|
|
Friday
Sep 18
|
Sunny
|
91°F |
7 to 13 mph
S
|
|
Friday Night
Sep 18
|
Mostly Clear then Slight Chance Rain Showers
|
70°F |
12 mph
S
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
88°F |
8 to 13 mph
S
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
65°F |
7 to 10 mph
SSE
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
83°F |
9 mph
ESE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grainville.