Live Weather & Forecast
Weather in Ontario
United States · Real-time conditions & 3-day outlook
0°C
Feels like -7°C
33°F / Feels 20°F
Partly cloudy
Ontario, United States
🌞 Daytime
Updated: 2026-04-12 08:45
Humidity
74%
Wind
35.3 km/h WNW
Wind Gust
45.2 km/h
Pressure
1012 mb
Visibility
24 km
UV Index
0.4
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
-5.3°C
Wind Degree
301°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
166.9 μg/m³
NO₂
1.2 μg/m³
O₃
99 μg/m³
SO₂
1.1 μg/m³
PM 2.5
5.8 μg/m³
PM 10
8.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Ontario, United States
12 AM
-0°
Cloudy
1 AM
-1°
Partly Cloudy
2 AM
-1°
Partly Cloudy
3 AM
-1°
Partly Cloudy
4 AM
-1°
Partly Cloudy
5 AM
-1°
Partly Cloudy
6 AM
-1°
Clear
7 AM
-1°
Sunny
8 AM
0°
Partly cloudy
9 AM
1°
Partly Cloudy
10 AM
2°
Sunny
11 AM
2°
Sunny
12 PM
3°
Sunny
1 PM
3°
Sunny
2 PM
3°
Sunny
3 PM
4°
Sunny
4 PM
4°
Sunny
5 PM
3°
Sunny
6 PM
3°
Sunny
7 PM
1°
Sunny
8 PM
-1°
Clear
9 PM
-1°
Clear
10 PM
-1°
Clear
11 PM
-2°
Clear
3-Day Forecast
Daily overview for Ontario, United States
Today
Sunny
4°
/
-2°
🌧️ 0% chance of rain
💧 Avg. humidity: 68%
💨 Max wind: 36.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1
🌅 Sunrise: 06:20 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
8°
/
-3°
🌧️ 74% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 25.2 km/h
🌧️ Total precip: 3.06 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:18 AM
🌇 Sunset: 07:46 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Heavy rain
9°
/
0°
🌧️ 87% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 18.4 km/h
🌧️ Total precip: 23.73 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:16 AM
🌇 Sunset: 07:47 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Ontario
Plan your trip around the most favorable weather conditions in Ontario, United States.
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: Partly cloudy, temperature 0°C, humidity 74%.
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 shares the climate of United States. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Ontario?
Rainfall patterns in Ontario vary by season. Peak rainfall typically occurs outside of the dry season.
What should I pack for Ontario?
For visits during June – September: light clothing and sun protection. For the November – March period: layers and a waterproof jacket are recommended for Ontario.
What country is Ontario in?
Ontario is a state/province of United States.
What are the public holidays in Ontario in 2026?
View the full list of 2026 public holidays for Ontario on our Holidays page.
What are the coordinates for the weather forecast in Ontario?
The weather forecast for Ontario is based on coordinates 46.1627, -60.2767.