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:
19°C
66.2°F
°C °F

Condition: Clear Sky

Pressure: 1,011 hPa

Feel like: 15 °C

Temperature: 19°C

Cloud: 0%

Humidity: 32%

Wind: SSW - 16 km/h

Visibility: 57.0 km

Weather forecast

Thu
24 Sep
6°C / 20°C
Overcast
Fri
25 Sep
12°C / 21°C
Drizzle
Sat
26 Sep
12°C / 23°C
Overcast
Sun
27 Sep
11°C / 18°C
Overcast
Mon
28 Sep
6°C / 19°C
Overcast
Hourly forecast today:
17:00 PM
2° / 19°
2° / 19°
Clear Sky
32% 30 km/h
18:00 PM
2° / 20°
2° / 20°
Clear Sky
31% 33 km/h
19:00 PM
2° / 21°
2° / 21°
Clear Sky
30% 33 km/h
20:00 PM
2° / 21°
2° / 21°
Clear Sky
29% 32 km/h
21:00 PM
2° / 21°
2° / 21°
Clear Sky
29% 30 km/h
22:00 PM
3° / 21°
3° / 21°
Clear Sky
31% 27 km/h
23:00 PM
2° / 19°
2° / 19°
Clear Sky
32% 27 km/h
00:00 AM
2° / 16°
2° / 16°
Clear Sky
38% 21 km/h
01:00 AM
2° / 15°
2° / 15°
Clear Sky
44% 27 km/h
02:00 AM
3° / 14°
3° / 14°
Clear Sky
47% 28 km/h
03:00 AM
2° / 13°
2° / 13°
Clear Sky
49% 29 km/h

30 Day Averages and Extremes

  • Average high 15.7°C
  • Average low 6.03°C
  • Hottest day 24°C (11 September 2026)
  • Coldest day 0°C (18 September 2026)
  • Average humidity 71.57%
  • Days with precipitation 18 days
  • Highest precipitation 42 mm (04 October 2026)

Yesterday's Data

  • Max: 22°C
  • Min: 5°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 18ºC to 21ºC (64.4ºF to 69.8ºF), you might consider wearing:
- Comfortable sandals or sneakers
- Cotton or linen fabrics
- Shorts or lightweight trousers
- Light, breathable socks

Temperature

Early
0°C / 12°C
Morning
3°C / 8°C
Afternoon
0°C / 15°C
Evening
2°C / 21°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 423
  • CO 116
  • NH3 0
  • NO2 0
  • O3 64
  • PM10 0
  • PM25 0
  • SO2 0
  • CH4 1,377

Sunrise / Sunset

11:29
23:37