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:
24°C
75.2°F
°C °F

Condition: Clear Sky

Pressure: 997 hPa

Feel like: 23 °C

Temperature: 24°C

Cloud: 0%

Humidity: 34%

Wind: NNE - 7 km/h

Visibility: 54.6 km

Weather forecast

Sat
05 Sep
10°C / 24°C
Overcast
Sun
06 Sep
12°C / 27°C
Drizzle
Mon
07 Sep
7°C / 12°C
Slight Rain
Tue
08 Sep
6°C / 15°C
Slight Rain
Wed
09 Sep
7°C / 16°C
Moderate Rain Showers
Hourly forecast today:
20:00 PM
7° / 24°
7° / 24°
Clear Sky
34% 9 km/h
21:00 PM
7° / 24°
7° / 24°
Clear Sky
34% 9 km/h
22:00 PM
6° / 24°
6° / 24°
Clear Sky
32% 10 km/h
23:00 PM
6° / 23°
6° / 23°
Clear Sky
32% 11 km/h
00:00 AM
5° / 22°
5° / 22°
Clear Sky
33% 14 km/h
01:00 AM
4° / 19°
4° / 19°
Clear Sky
36% 16 km/h
02:00 AM
4° / 18°
4° / 18°
Mainly Clear
41% 23 km/h
03:00 AM
6° / 17°
6° / 17°
Overcast
51% 23 km/h
04:00 AM
8° / 15°
8° / 15°
Partly Cloudy
61% 22 km/h
05:00 AM
10° / 14°
10° / 14°
Clear Sky
75% 23 km/h
06:00 AM
10° / 13°
10° / 13°
Mainly Clear
83% 23 km/h

30 Day Averages and Extremes

  • Average high 20.3°C
  • Average low 9.67°C
  • Hottest day 28°C (25 August 2026)
  • Coldest day 4°C (11 September 2026)
  • Average humidity 73.87%
  • Days with precipitation 18 days
  • Highest precipitation 51 mm (09 September 2026)

Yesterday's Data

  • Max: 21°C
  • Min: 15°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).

2. What should I wear in Ontario today?

For today's warm weather in Ontario, with temperatures between 21ºC to 24ºC (69.8ºF to 75.2ºF), you might consider wearing:
- Shorts or lightweight trousers
- Sunglasses
- Cotton or linen fabrics
- Light, breathable socks

Temperature

Early
13°C / 15°C
Morning
9°C / 11°C
Afternoon
9°C / 19°C
Evening
7°C / 24°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 421
  • CO 103
  • NH3 0
  • NO2 0
  • O3 79
  • PM10 3
  • PM25 2
  • SO2 0
  • CH4 1,397

Sunrise / Sunset

10:59
00:20