Ontario, OR Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, OR in one place.
Mostly sunny, with a high near 87. South wind 2 to 18 mph, with gusts as high as 32 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: May 27, 2026 8:13 PM MDT.
The active forecast window currently covers May 28 to Jun 3, 2026 for Ontario, OR.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 28 to Jun 3, 2026
- Latest sync
- May 27, 2026 8:13 PM MDT
- Forecast office
- BOI
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Wednesday looks like the warmest upcoming period in Ontario at 90 degrees F.
Saturday Night is the coolest period ahead with temperatures near 45 degrees F.
The strongest winds are forecast for Thursday Night at about 6 to 22 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 27, 2026 8:13 PM 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
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 51. Southwest wind 6 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Partly sunny, with a high near 81. West northwest wind 8 to 14 mph.
A chance of rain showers before midnight. Mostly cloudy, with a low around 51. Northwest wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
A slight chance of rain showers before noon. Partly sunny, with a high near 73. Chance of precipitation is 20%.
Partly cloudy, with a low around 45.
Sunny, with a high near 76.
Partly cloudy, with a low around 47.
Sunny, with a high near 80.
Mostly clear, with a low around 50.
Sunny, with a high near 87.
Mostly clear, with a low around 54.
Mostly sunny, with a high near 90.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
May 28
|
Mostly Sunny
|
87°F |
2 to 18 mph
S
|
|
Thursday Night
May 28
|
Slight Chance Rain Showers then Partly Cloudy
|
51°F |
6 to 22 mph
SW
|
|
Friday
May 29
|
Partly Sunny
|
81°F |
8 to 14 mph
WNW
|
|
Friday Night
May 29
|
Chance Rain Showers then Mostly Cloudy
|
51°F |
14 to 17 mph
NW
|
|
Saturday
May 30
|
Slight Chance Rain Showers then Partly Sunny
|
73°F |
14 mph
WNW
|
|
Saturday Night
May 30
|
Partly Cloudy
|
45°F |
12 to 15 mph
NNW
|
|
Sunday
May 31
|
Sunny
|
76°F |
6 to 12 mph
NW
|
|
Sunday Night
May 31
|
Partly Cloudy
|
47°F |
7 mph
NW
|
|
Monday
Jun 1
|
Sunny
|
80°F |
0 to 6 mph
N
|
|
Monday Night
Jun 1
|
Mostly Clear
|
50°F |
5 mph
N
|
|
Tuesday
Jun 2
|
Sunny
|
87°F |
0 to 3 mph
N
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
54°F |
6 mph
N
|
|
Wednesday
Jun 3
|
Mostly Sunny
|
90°F |
2 to 8 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.
