Live Weather & Forecast
Weather in Cornwall
Ontario, Canada · Real-time conditions & 3-day outlook
4°C
Feels like 2°C
40°F / Feels 35°F
Clear
Cornwall, Ontario
🌙 Nighttime
Updated: 2026-04-25 02:30
Humidity
50%
Wind
11.2 km/h ENE
Wind Gust
23.1 km/h
Pressure
1017 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-3.6°C
Wind Degree
71°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
156.9 μg/m³
NO₂
10.4 μg/m³
O₃
45 μg/m³
SO₂
3.9 μg/m³
PM 2.5
5.7 μg/m³
PM 10
5.8 μg/m³
Today's Hourly Forecast
24-hour breakdown for Cornwall, Ontario
12 AM
5°
Clear
1 AM
4°
Clear
2 AM
4°
Clear
3 AM
2°
Clear
4 AM
2°
Clear
5 AM
1°
Clear
6 AM
1°
Sunny
7 AM
2°
Sunny
8 AM
4°
Sunny
9 AM
5°
Sunny
10 AM
7°
Sunny
11 AM
10°
Sunny
12 PM
10°
Sunny
1 PM
11°
Sunny
2 PM
12°
Sunny
3 PM
12°
Sunny
4 PM
13°
Partly Cloudy
5 PM
12°
Sunny
6 PM
11°
Partly Cloudy
7 PM
10°
Partly Cloudy
8 PM
8°
Cloudy
9 PM
7°
Overcast
10 PM
7°
Overcast
11 PM
7°
Overcast
3-Day Forecast
Daily overview for Cornwall, Ontario
Today
Sunny
13°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 59%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 5.9
🌅 Sunrise: 05:57 AM
🌇 Sunset: 07:57 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Sunny
15°
/
3°
🌧️ 0% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 13.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 5.5
🌅 Sunrise: 05:56 AM
🌇 Sunset: 07:59 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Mon, Apr 27
Sunny
19°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 10.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.2
🌅 Sunrise: 05:54 AM
🌇 Sunset: 08:00 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Best Time to Visit Cornwall
Plan your trip to Cornwall, Canada around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Cornwall?
Current conditions in Cornwall: Clear, temperature 4°C, humidity 50%.
What is the best time to visit Cornwall?
The best time to visit Cornwall is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Cornwall?
Cornwall is located at approximately 45° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Cornwall?
The wettest period in Cornwall is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Cornwall?
For visits to Cornwall during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Cornwall in 2026?
View the 2026 public holidays for Cornwall on our Holidays page.
What are the GPS coordinates used for the weather forecast in Cornwall?
The weather forecast for Cornwall uses coordinates 45.0184, -74.7287.
What is the current temperature outside in Cornwall?
The current outdoor temperature in Cornwall is 4°C (39°F) with clear.
What is the hourly weather forecast for Cornwall today?
Today's hour-by-hour weather breakdown for Cornwall is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in Cornwall tomorrow hour by hour?
Tomorrow's forecast for Cornwall shows a high of 15°C and a low of 3°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in Cornwall?
Rain is not expected in Cornwall today. Current forecast shows no significant rain probability.
Is it going to rain today in Cornwall?
No, rain is not forecast for Cornwall today. Current conditions show clear to partly cloudy skies.