Ontario, Canada Weather

  1. Ontario, Canada Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Ontario over the next 12 hours
  7. Temperature and possibility of rain in Ontario in the coming days
  8. Rainfall in Ontario in the coming days
  9. Ontario Weather Summary
  10. Weather averages by month
  11. Ontario's weather
  12. Frequently asked questions
  13. Comments
Ontario, Weather
(Photo by Yalın Kaya on Unsplash)

Current conditions

Updated:
-6°C
21.2°F
°C °F

Condition: Clear Sky

Pressure: 995 hPa

Feel like: -10 °C

Temperature: -6°C

Cloud: 17%

Humidity: 96%

Wind: W - 6 km/h

Visibility: 16.38 km

Weather forecast

Sat
15 Nov
-2°C / 2°C
Moderate Snowfall
Sun
16 Nov
-4°C / 0°C
Snow Showers Slight
Mon
17 Nov
-5°C / -1°C
Fog
Tue
18 Nov
-1°C / 0°C
Overcast
Wed
19 Nov
-3°C / 0°C
Overcast
Hourly forecast today:
08:00 AM
-6° / -6°
-6° / -6°
Clear Sky
96% 23 km/h
09:00 AM
-7° / -6°
-7° / -6°
Mainly Clear
96% 21 km/h
10:00 AM
-7° / -6°
-7° / -6°
Mainly Clear
96% 18 km/h
11:00 AM
-7° / -7°
-7° / -7°
Partly Cloudy
96% 16 km/h
12:00 PM
-7° / -7°
-7° / -7°
Overcast
96% 12 km/h
13:00 PM
-8° / -7°
-8° / -7°
Partly Cloudy
96% 5 km/h
14:00 PM
-7° / -6°
-7° / -6°
Overcast
92% 3 km/h
15:00 PM
-6° / -4°
-6° / -4°
Partly Cloudy
85% 1 km/h
16:00 PM
-5° / -2°
-5° / -2°
Partly Cloudy
79% 2 km/h
17:00 PM
-5° / -1°
-5° / -1°
Overcast
77% 5 km/h
18:00 PM
-5° / -1°
-5° / -1°
Overcast
74% 7 km/h

30 Day Averages and Extremes

  • Average high 1.37°C
  • Average low -3.93°C
  • Hottest day 11°C (28 October 2025)
  • Coldest day -11°C (07 November 2025)
  • Average humidity 82.13%
  • Days with precipitation 19 days
  • Highest precipitation 62 mm (16 November 2025)

Yesterday's Data

  • Max: 0°C
  • Min: -4°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Ontario over the next 12 hours

Temperature and possibility of rain in Ontario in the coming days

Rainfall in Ontario in the coming days

Ontario Climate Summary

Ontario features a Subartic, severe winter, no dry season, cool summer (Köppen classification: Dfc), with an average annual temperature of 2.61ºC (36.7ºF), which is about 0.52% higher than the national average for Canada. Annually, the city experiences approximately 40.94 millimeters (1.61 inches) of rainfall, spread across 99.45 rainy days, accounting for 27.25% of the year.

Longitude 51.253775
Latitude -85.323214
Yearly high temperature 5.73ºC (42.31ºF)
Yearly low temperature -3.07ºC (26.47ºF)
Hottest month June 20.53ºC (68.95ºF)
Coldest month January -20.82ºC (-5.48ºF)
Yearly precip 40.94mm (1.61in)
Days with rainfall 99.45 days (27.25%)
Driest month February (93.43%)
Wettest month September (78.45%)

Weather averages by month

Month High / Low (°C) Rain
January -12.89° / -20.82° 7.27 days
February -11.46° / -19.89° 6.09 days
March -3.99° / -12.13° 8.36 days
April 3.16° / -5.18° 8.09 days
May 14.6° / 3.55° 8.91 days
June 20.53° / 8.78° 8.91 days
July 24.1° / 12.26° 8.64 days
August 22.28° / 11.37° 9.64 days
September 15.66° / 6.63° 8.27 days
October 7.34° / 0.95° 8.91 days
November -1.44° / -6.84° 9.45 days
December -9.1° / -15.56° 6.91 days

Ontario's weather

Frequently asked questions

1. What is the hottest month in Ontario?

June has the highest average monthly temperature (daily mean of 20.53ºC) and January are the coolest (daily mean of -20.82ºC).

Temperature

Early
-5°C / -4°C
Morning
-7°C / -6°C
Afternoon
-6°C / -4°C
Evening
-4°C / -1°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 442
  • CO 135
  • NH3 0
  • NO2 0
  • O3 67
  • PM10 0
  • PM25 0
  • SO2 0
  • CH4 1,387

Sunrise / Sunset

12:57
21:53