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:
15°C
59.0°F
°C °F

Condition: Overcast

Pressure: 988 hPa

Feel like: 14 °C

Temperature: 15°C

Cloud: 100%

Humidity: 73%

Wind: NE - 8 km/h

Visibility: 20.9 km

Weather forecast

Tue
28 Jul
15°C / 24°C
Overcast
Wed
29 Jul
11°C / 29°C
Drizzle
Thu
30 Jul
16°C / 36°C
Overcast
Fri
31 Jul
18°C / 29°C
Overcast
Sat
01 Aug
14°C / 24°C
Overcast
Hourly forecast today:
07:00 AM
10° / 15°
10° / 15°
Overcast
73% 25 km/h
08:00 AM
10° / 15°
10° / 15°
Overcast
73% 24 km/h
09:00 AM
9° / 13°
9° / 13°
Clear Sky
77% 21 km/h
10:00 AM
10° / 12°
10° / 12°
Clear Sky
84% 20 km/h
11:00 AM
11° / 13°
11° / 13°
Clear Sky
87% 27 km/h
12:00 PM
11° / 14°
11° / 14°
Overcast
82% 15 km/h
13:00 PM
11° / 15°
11° / 15°
Overcast
75% 7 km/h
14:00 PM
11° / 15°
11° / 15°
Overcast
73% 9 km/h
15:00 PM
11° / 16°
11° / 16°
Overcast
70% 10 km/h
16:00 PM
10° / 19°
10° / 19°
Overcast
55% 18 km/h
17:00 PM
9° / 21°
9° / 21°
Overcast
48% 19 km/h

30 Day Averages and Extremes

  • Average high 25.8°C
  • Average low 13.63°C
  • Hottest day 37°C (13 July 2026)
  • Coldest day 4°C (10 August 2026)
  • Average humidity 61.2%
  • Days with precipitation 21 days
  • Highest precipitation 26 mm (04 August 2026)

Yesterday's Data

  • Max: 22°C
  • Min: 12°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 20ºC to 23ºC (68.0ºF to 73.4ºF), you might consider wearing:
- Light, breathable socks
- Sun hat or cap
- Shorts or lightweight trousers
- T-shirt or short-sleeve blouse

Temperature

Early
11°C / 17°C
Morning
9°C / 13°C
Afternoon
11°C / 16°C
Evening
5°C / 23°C

Air quality

Moderate

Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals

  • CO2 466
  • CO 113
  • NH3 0
  • NO2 4
  • O3 41
  • PM10 19
  • PM25 18
  • SO2 0
  • CH4 1,386

Sunrise / Sunset

09:59
01:36