Cornwall Weather Today — Ontario, Canada
Current temperature, rain chance, humidity, wind and air quality in Cornwall, plus an hourly and 3-day forecast. Updated through the day.
14:46
Fri, 18 Sep 2026
📍 Ontario, Canada
Cornwall??
18
°C
Sunny
Feels 13°C · 64°F
💧 38% Humidity
💨 ↑ 16.6 km/h NNW
👁 10 km Visibility
🌧 0 mm Precip
☁ 2% Cloud
☀️ UV Moderate
🌿 AQI Good
☀️ UV Index
4.6
Moderate
🔵 Pressure
1022
hPa · 30.18 in
💨 Wind
16.6
km/h · Gust 22 km/h
↑ NNW
💧 Humidity
38%
Dew point 3.4°C
👁 Visibility
10
km · 6 miles
🌡 Heat Index
17.8°
Wind chill 17.8°C
🌿 Air Quality
Good
US EPA Index: 1
🌅
Sunrise
06:41 AM
🌇
Sunset
07:04 PM
📅 3-Day Forecast
Friday
18 Sep 2026
Sunny
18°
/
9°
💧68%
🌧0mm
💨18
☀️UV 5
Saturday
19 Sep 2026
Sunny
16°
/
4°
💧66%
🌧0mm
💨10
☀️UV 5
Sunday
20 Sep 2026
Overcast
15°
/
7°
💧76%
🌧0.05mm
💨9
☀️UV 4.7
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