⭐ Support Time.now: Join our Premium Plan for an ad-free experience! ⭐ Support Us: Go Premium Ad-Free!

Weather in Ontario, United States 🇺🇸

Current Weather in Ontario

Clear
24°C
Feels like 23°C. Clear.
🌬️ 7 km/h SW
💧 45% Humidity
🧭 1011 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 0.0
🌡️ Dew Point: 11°C
🌅 Sunrise: 06:59 AM
🌇 Sunset: 06:12 PM
Map Overlays:

As of now, Ontario is 24°C and clear, feeling like 23°C. Humidity is 45% with winds around 7 km/h, and the UV index is 0 (low). The next few days in Ontario look set for about 18°C up to 29°C.

Hourly Forecast for Ontario

22:00
Clear
23°
2%
23:00
Clear
23°
2%
00:00
Clear
22°
2%
01:00
Clear
22°
3%
02:00
Clear
21°
3%
03:00
Clear
21°
3%
04:00
Clear
21°
4%
05:00
Clear
21°
4%
06:00
Clear
20°
4%
07:00
Clear
20°
4%
08:00
Sunny
21°
4%
09:00
Sunny
22°
3%
10:00
Sunny
23°
2%
11:00
Sunny
25°
1%
12:00
Sunny
26°
1%
13:00
Sunny
26°
1%
14:00
Sunny
27°
1%
15:00
Sunny
27°
1%
16:00
Sunny
26°
1%
17:00
Sunny
25°
1%
18:00
Sunny
23°
2%
19:00
Clear
21°
3%
20:00
Clear
21°
3%
21:00
Clear
21°
3%

14-Day Forecast for Ontario

Mon, Oct 19
Sunny Sunny
29° / 21°
Tue, Oct 20
Sunny Sunny
27° / 20°
Wed, Oct 21
Sunny Sunny
25° / 18°
Thu, Oct 22
Patchy rain nearby Patchy rain nearby
21° / 17°
Fri, Oct 23
Sunny Sunny
23° / 16°
Sat, Oct 24
Sunny Sunny
28° / 19°
Sun, Oct 25
Overcast Overcast
30° / 21°
Mon, Oct 26
Sunny Sunny
31° / 23°
Tue, Oct 27
Overcast Overcast
31° / 23°
Wed, Oct 28
Sunny Sunny
31° / 24°
Thu, Oct 29
Overcast Overcast
26° / 20°
Fri, Oct 30
Overcast Overcast
23° / 18°
Sat, Oct 31
Sunny Sunny
19° / 16°
Sun, Nov 01
Sunny Sunny
23° / 15°

Additional Forecasts for Ontario

Air Quality

💨 US EPA Index 2 (Moderate)
CO (Carbon Monoxide) 205.0 μg/m³
O₃ (Ozone) 66.0 μg/m³
NO₂ (Nitrogen Dioxide) 30.0 μg/m³
SO₂ (Sulphur Dioxide) 3.0 μg/m³
PM2.5 (Fine particles) 16.5 μg/m³
PM10 (Coarse particles) 22.1 μg/m³

Historical Weather

Weather Forecasts for Other Cities in United States

Browse Weather in United States by cities in alphabetical order:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Weather in United States ›

Best Time to Be Outside in Ontario Tomorrow

There is no good daylight window left in Ontario today. Tomorrow, the most comfortable window looks like 08:00 to 11:00, when it is around 22°C. It should stay dry through that window. No significant rain is expected in the next several hours.

Frequently Asked Questions about Weather in Ontario

What is the temperature in Ontario right now?

It is currently 24°C (75°F) in Ontario, clear (feels like 23°C).

What's the weather like in Ontario right now?

Current weather in Ontario: Clear, humidity 45%, wind 7 km/h SW.

What is today's forecast for Ontario?

Today in Ontario: high 29°C, low 21°C, sunny. Chance of rain: 1%.

What is the 7-day weather forecast for Ontario?

Daily highs and lows for Ontario:

  • 2026-10-19: 29°C / 21°C
  • 2026-10-20: 27°C / 20°C
  • 2026-10-21: 25°C / 18°C
  • 2026-10-22: 21°C / 17°C
  • 2026-10-23: 23°C / 16°C
  • 2026-10-24: 28°C / 19°C
  • 2026-10-25: 30°C / 21°C
Is it going to rain in Ontario today?

There is a 1% chance of rain in Ontario today.

What is the wind speed in Ontario right now?

Wind in Ontario is currently 7 km/h (4 mph) from the SW.

What is the UV index in Ontario right now?

The UV index in Ontario is currently 0 (low). Sun protection is recommended when the index is 3 or higher.

Weather forecasts for other major cities in 🇺🇸 United States: New York City · Los Angeles · Brooklyn · Chicago · Houston · Queens · Phoenix · Philadelphia · Manhattan · San Antonio · San Diego · The Bronx · Dallas · Jacksonville · Austin · Fort Worth · Columbus · Indianapolis · Charlotte · San Francisco · Seattle · Denver · Washington, D.C. · Washington · Nashville · El Paso · Oklahoma City · Detroit · Boston · Portland · New South Memphis · Memphis · Las Vegas · Milwaukee · Baltimore · South Boston · Albuquerque · Tucson · Fresno · Sacramento · Omaha · Kansas City · Long Beach · Mesa · Staten Island · Atlanta · Colorado Springs · Virginia Beach · Raleigh · Miami