Ontario, OR Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, OR in one place.
Sunny, with a high near 71. East wind 1 to 5 mph.
Local Weather Overview
This forecast page for Ontario, OR 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: Oct 15, 2026 11:47 AM MDT.
The active forecast window currently covers Oct 16 to Oct 21, 2026 for Ontario, OR.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 11:47 AM MDT
- Forecast office
- BOI
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Saturday looks like the warmest upcoming period in Ontario at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Saturday Night at about 2 to 7 mph NW.
The forecast from Oct 16 through Oct 21 stays mostly dry.
Forecast Details
- Last updated
- Oct 15, 2026 11:47 AM MDT
- Coverage
- 7 days
- Time zone
- America/Boise
- Forecast office
- BOI
- Radar station
- KCBX
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 37. North northeast wind around 2 mph.
Sunny, with a high near 73. East southeast wind around 2 mph.
Mostly clear, with a low around 38.
Sunny, with a high near 69.
Mostly clear, with a low around 37.
Mostly sunny, with a high near 70.
Partly cloudy, with a low around 40.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 38.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 38.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Sunny
|
71°F |
1 to 5 mph
E
|
|
Friday Night
Oct 16
|
Mostly Clear
|
37°F |
2 mph
NNE
|
|
Saturday
Oct 17
|
Sunny
|
73°F |
2 mph
ESE
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
38°F |
2 to 7 mph
NW
|
|
Sunday
Oct 18
|
Sunny
|
69°F |
0 mph
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
37°F |
0 mph
|
|
Monday
Oct 19
|
Mostly Sunny
|
70°F |
0 mph
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
40°F |
1 mph
NNW
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
67°F |
3 mph
NW
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
38°F |
0 to 5 mph
NNW
|
|
Wednesday
Oct 21
|
Mostly Sunny
|
66°F |
1 mph
NNW
|
|
Wednesday Night
Oct 21
|
Partly Cloudy
|
38°F |
0 mph
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.
