Cornwall, ID Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Cornwall, ID in one place.
A chance of rain showers after 5pm. Mostly sunny. High near 74, with temperatures falling to around 70 in the afternoon. North wind 0 to 7 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Cornwall, 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 16, 2026 2:38 PM PDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Cornwall, ID.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 2:38 PM PDT
- Forecast office
- OTX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cornwall
Sunday looks like the warmest upcoming period in Cornwall at 77 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Thursday at about 0 to 7 mph N.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 2:38 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- OTX
- Radar station
- KOTX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers before 5am. Mostly cloudy, with a low around 50. West wind 0 to 6 mph. Chance of precipitation is 40%.
Mostly sunny, with a high near 72. Northwest wind 0 to 5 mph.
Mostly clear, with a low around 46.
Sunny, with a high near 74.
Mostly clear, with a low around 46.
Sunny, with a high near 77.
Mostly clear, with a low around 47.
Sunny, with a high near 76.
Mostly clear, with a low around 46.
Sunny, with a high near 73.
Partly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Mostly Sunny then Chance Rain Showers
|
74°F |
0 to 7 mph
N
|
|
Thursday Night
Sep 17
|
Chance Rain Showers
|
50°F |
0 to 6 mph
W
|
|
Friday
Sep 18
|
Mostly Sunny
|
72°F |
0 to 5 mph
NW
|
|
Friday Night
Sep 18
|
Mostly Clear
|
46°F |
0 to 5 mph
NW
|
|
Saturday
Sep 19
|
Sunny
|
74°F |
0 to 3 mph
W
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
46°F |
0 to 3 mph
NE
|
|
Sunday
Sep 20
|
Sunny
|
77°F |
1 to 6 mph
SE
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
47°F |
2 mph
NE
|
|
Monday
Sep 21
|
Sunny
|
76°F |
5 mph
S
|
|
Monday Night
Sep 21
|
Mostly Clear
|
46°F |
0 to 3 mph
NW
|
|
Tuesday
Sep 22
|
Sunny
|
73°F |
5 mph
W
|
|
Tuesday Night
Sep 22
|
Partly Cloudy
|
44°F |
2 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cornwall.