Live Weather & Forecast
Weather in Ontario
Oregon, United States · Real-time conditions & 3-day outlook
8°C
Feels like 5°C
47°F / Feels 42°F
Light rain
Ontario, Oregon
🌞 Daytime
Updated: 2026-04-15 11:15
Humidity
90%
Wind
18.4 km/h S
Wind Gust
23.8 km/h
Pressure
1011 mb
Visibility
16 km
UV Index
1
(Low)
Precipitation
0.54 mm
Cloud Cover
100%
Dew Point
7.9°C
Wind Degree
177°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
157.9 μg/m³
NO₂
1.6 μg/m³
O₃
86 μg/m³
SO₂
1 μg/m³
PM 2.5
1.1 μg/m³
PM 10
1.2 μg/m³
Weather Alerts 1
Met
· Severe · Future
Freeze Watch issued April 15 at 2:23AM MDT until April 17 at 10:00AM MDT by NWS Boise ID
* WHAT...Sub-freezing temperatures as low as 24 degrees in the western Magic Valley, as low as 27 degrees in the Upper Treasure Valley, and as low as 30 degrees in the Lower Treasure Valley of Idaho and Oregon. Sub-freezing temperatures are expected again early Saturday morning, but not quite as cold as Friday morning. * WHERE...Portions of south central and southwest Idaho and southeast Oregon....
Take steps now to protect tender plants from the cold.
Today's Hourly Forecast
24-hour breakdown for Ontario, Oregon
12 AM
10°
Clear
1 AM
9°
Clear
2 AM
9°
Clear
3 AM
9°
Clear
4 AM
9°
Patchy rain nearby
5 AM
8°
Clear
6 AM
8°
Clear
7 AM
9°
Patchy rain nearby
8 AM
9°
Patchy rain nearby
9 AM
9°
Light rain
10 AM
10°
Light rain
11 AM
8°
Light rain
12 PM
12°
Patchy rain nearby
1 PM
13°
Patchy rain nearby
2 PM
14°
Patchy rain nearby
3 PM
14°
Patchy rain nearby
4 PM
13°
Light drizzle
5 PM
11°
Patchy rain nearby
6 PM
10°
Patchy rain nearby
7 PM
8°
Patchy rain nearby
8 PM
7°
Sunny
9 PM
5°
Clear
10 PM
4°
Clear
11 PM
3°
Partly Cloudy
3-Day Forecast
Daily overview for Ontario, Oregon
Today
Patchy rain nearby
15°
/
2°
🌧️ 88% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 3.88 mm
☀️ UV Index: 0.4
🌅 Sunrise: 07:05 AM
🌇 Sunset: 08:32 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Partly Cloudy
9°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 51%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.1
🌅 Sunrise: 07:03 AM
🌇 Sunset: 08:33 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Sunny
13°
/
-3°
🌧️ 0% chance of rain
💧 Avg. humidity: 60%
💨 Max wind: 10.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 07:01 AM
🌇 Sunset: 08:35 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Ontario
Plan your trip to Ontario, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Ontario?
Current conditions in Ontario: Light rain, temperature 8°C, humidity 90%.
What is the best time to visit Ontario?
The best time to visit Ontario is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Ontario?
Ontario is located at approximately 44° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Ontario?
The wettest period in Ontario is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Ontario?
For visits to Ontario during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Ontario in?
Ontario is located in United States, in the state of Oregon.
What are the public holidays in Ontario in 2026?
View the 2026 public holidays for Ontario on our Holidays page.
What are the GPS coordinates used for the weather forecast in Ontario?
The weather forecast for Ontario uses coordinates 44.0266, -116.9629.