Grainville, ID Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grainville, ID in one place.
Sunny, with a high near 73. South southeast wind 3 to 7 mph.
Local Weather Overview
This forecast page for Grainville, ID 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 8:59 PM MDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Grainville, ID.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 8:59 PM MDT
- Forecast office
- PIH
- Source
- NOAA / NWS
Daily Outlook
This Week in Grainville
Wednesday looks like the warmest upcoming period in Grainville at 79 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Thursday at about 12 mph E.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 8:59 PM MDT
- Coverage
- 7 days
- Time zone
- America/Boise
- Forecast office
- PIH
- Radar station
- KSFX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear. Low around 39, with temperatures rising to around 41 overnight. East northeast wind around 7 mph.
Sunny, with a high near 79. South wind around 7 mph.
A chance of rain after midnight. Partly cloudy, with a low around 47. East northeast wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
A chance of rain before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 50%.
Showers and thunderstorms likely before midnight, then rain likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
A chance of rain before noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
A slight chance of rain before midnight. Partly cloudy, with a low around 39. Chance of precipitation is 20%.
Sunny, with a high near 70.
Mostly clear, with a low around 38.
Sunny, with a high near 73.
Mostly clear, with a low around 38.
Sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Sunny
|
73°F |
3 to 7 mph
SSE
|
|
Tuesday Night
Sep 15
|
Mostly Clear
|
39°F |
7 mph
ENE
|
|
Wednesday
Sep 16
|
Sunny
|
79°F |
7 mph
S
|
|
Wednesday Night
Sep 16
|
Partly Cloudy then Chance Light Rain
|
47°F |
6 to 10 mph
ENE
|
|
Thursday
Sep 17
|
Chance Light Rain then Chance Showers And Thunderstorms
|
77°F |
12 mph
E
|
|
Thursday Night
Sep 17
|
Showers And Thunderstorms Likely then Light Rain Likely
|
45°F |
5 to 8 mph
ESE
|
|
Friday
Sep 18
|
Chance Light Rain then Slight Chance Showers And Thunderstorms
|
71°F |
3 to 8 mph
SSE
|
|
Friday Night
Sep 18
|
Slight Chance Light Rain then Partly Cloudy
|
39°F |
5 mph
SSE
|
|
Saturday
Sep 19
|
Sunny
|
70°F |
7 mph
SW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
38°F |
6 mph
ESE
|
|
Sunday
Sep 20
|
Sunny
|
73°F |
5 mph
WSW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
38°F |
3 to 7 mph
NE
|
|
Monday
Sep 21
|
Sunny
|
76°F |
3 to 7 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grainville.