Cornwall Weather Conditions
Current Temperature Level
Cornwall Weather Conditions
Current Temperature Level
Feels Like 18°C
Chances of Rain12%
21°12%5 PM20°13%6 PM19°14%7 PM16°16%8 PM15°18%9 PM14°19%10 PM15°16%11 PM
15°5%12 AM
14°8%1 AM14°17%2 AM13°18%3 AM13°17%4 AM13°17%5 AM13°18%6 AM13°18%7 AM12°18%8 AM13°18%9 AM14°16%10 AM14°15%11 AM15°15%12 PM
14°13%1 PM17°13%2 PM
17°15%3 PM16°24%Skies may remain grey and overcast.
Last Updated: 2026-09-26 16:00 (Local Time)
45°NE
Direction
16.2km/h
Wind Speed
Gust Speed
8.8m/s
Precipitation
Precipitation
0mm
Pressure
1017mb
UV Index
1.4Low
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Today
15
°C
69%Sunday
15
°C64%Monday
14
°C81%Tuesday
12
°C88%Wednesday
15
°C86%Thursday
18
°C79%Friday
23
°C63%Saturday
16
°C65%Sunday
13
°C80%Monday
13
°C75%Overcast
Fully overcast skies with a high of 15 °C. Humidity will be 69%, and winds at 18.7 km/h.21°C / 9°C
Humi.69 %
Prec.0 mm
Sunrise
06:51 AM11hrs 58min
Sunset
06:49 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Clear
11 °C
85 %
0
7.9 kmph / NE
Clear
Feels 10 °C
Cover 3 %
Visibility 10 km
1 AM
Clear
11 °C
87 %
0
6.5 kmph / NE
ClearFeels 10 °C
Cover 0 %
Visibility 10 km
2 AM
Clear
10 °C
87 %
0
7.9 kmph / NNE
ClearFeels 9 °C
Cover 0 %
Visibility 10 km
3 AM
Clear
10 °C
89 %
0
7.9 kmph / NE
ClearFeels 9 °C
Cover 0 %
Visibility 10 km
4 AM
Clear
9 °C
91 %
0
7.2 kmph / NE
ClearFeels 8 °C
Cover 2 %
Visibility 10 km
5 AM
Overcast
11 °C
83 %
0
7.6 kmph / NE
OvercastFeels 10 °C
Cover 100 %
Visibility 10 km
6 AM
Overcast
11 °C
83 %
0
7.9 kmph / NE
OvercastFeels 9 °C
Cover 100 %
Visibility 10 km
7 AM
Overcast
11 °C
83 %
0
7.6 kmph / NNE
OvercastFeels 9 °C
Cover 100 %
Visibility 10 km
8 AM
Overcast
12 °C
79 %
0.1
7.2 kmph / NE
OvercastFeels 10 °C
Cover 100 %
Visibility 10 km
9 AM
Overcast
13 °C
70 %
0.6
10.4 kmph / NE
OvercastFeels 11 °C
Cover 100 %
Visibility 10 km
10 AM
Overcast
16 °C
63 %
1.6
12.6 kmph / NE
OvercastFeels 13 °C
Cover 100 %
Visibility 10 km
11 AM
Overcast
18 °C
57 %
2.8
15.1 kmph / NE
OvercastFeels 15 °C
Cover 100 %
Visibility 10 km
12 PM
Overcast
19 °C
52 %
3.6
16.9 kmph / NE
OvercastFeels 16 °C
Cover 100 %
Visibility 10 km
1 PM
Overcast
20 °C
47 %
4.1
17.6 kmph / NE
OvercastFeels 17 °C
Cover 100 %
Visibility 10 km
2 PM
Overcast
21 °C
47 %
3.4
18.7 kmph / NE
OvercastFeels 17 °C
Cover 100 %
Visibility 10 km
3 PM
Overcast
21 °C
48 %
1.9
17.6 kmph / NE
OvercastFeels 17 °C
Cover 100 %
Visibility 10 km
4 PM
Overcast
21 °C
52 %
1.4
16.2 kmph / NE
OvercastFeels 18 °C
Cover 100 %
Visibility 10 km
5 PM
Overcast
20 °C
55 %
0.6
14 kmph / NE
OvercastFeels 17 °C
Cover 100 %
Visibility 10 km
6 PM
Overcast
19 °C
60 %
0.2
11.9 kmph / NE
OvercastFeels 17 °C
Cover 100 %
Visibility 10 km
7 PM
Overcast
16 °C
66 %
0
10.1 kmph / NE
OvercastFeels 14 °C
Cover 96 %
Visibility 10 km
8 PM
Overcast
15 °C
70 %
0
10.4 kmph / NNE
OvercastFeels 13 °C
Cover 100 %
Visibility 10 km
9 PM
Overcast
14 °C
72 %
0
11.2 kmph / NNE
OvercastFeels 12 °C
Cover 100 %
Visibility 10 km
10 PM
Overcast
15 °C
65 %
0
14.8 kmph / NNE
OvercastFeels 12 °C
Cover 100 %
Visibility 10 km
11 PM
Clear
15 °C
64 %
0
17.3 kmph / NNE
ClearFeels 11 °C
Cover 14 %
Visibility 10 km
27°16°28°16°27°19°24°15°21°13°23°12°26°12°21°14°
23°13°24°13°21°9°24°7°
23°16°18°9°20°7°24°15°22°13°18°9°17°5°20°7°15°7°17°5°19°5°20°6°21°8°21°9°17°12°17°11°15°10°20°11°SeptemberWeather Overview
No. of days:
Sunny
14
Cloudy
0
Rainy
2
Snowy
0
The monthly weather averages in Cornwall consist of 14 sunny days, 0 cloudy days, 2 rainy days, and 0 snowy days.
Cornwall's Locations Weather Conditions
Canada's Hottest Cities - September 2026
1.
Oshawa, Ontario
23 °C
Overcast
28%
2.2
18 kmph / NE
2.
Toronto, Ontario
23 °C
Overcast
27%
2.3
13.7 kmph / N
3.
Oakville, Ontario
23 °C
Overcast
31%
2.2
12.2 kmph / N
4.
Milton, Ontario
23 °C
Overcast
31%
2.2
12.2 kmph / N
5.
London, Ontario
23 °C
Cloudy
20%
2.6
16.9 kmph / NNE
6.
Mississauga, Ontario
23 °C
Overcast
31%
2.2
12.2 kmph / N
7.
Longueuil, Quebec
22 °C
Overcast
39%
1.4
20.5 kmph / NE
8.
Boucherville, Quebec
22 °C
Overcast
39%
1.4
20.5 kmph / NE
9.
Parry Sound, Ontario
22 °C
Sunny
26%
2.3
12.6 kmph / NNE
10.
Charlemagne, Quebec
22 °C
Overcast
39%
1.4
20.5 kmph / NE
Last Updated: 26 Sept 2026, 08:32 PM
City Weather RankingsFAQs About Cornwall Weather Conditions
1. What is the current temperature in Cornwall today - 26 September 2026?
1. What is the current temperature in Cornwall today - 26 September 2026?
The current temperature in Cornwall is 21°C, with a feels-like temperature of 18°C. Today's forecast shows a high of 21°C and a low of 9°C, giving a 12 degree swing through the day as of 04:00 PM 26 September 2026.
2. What are the current weather parameters in Cornwall today?
2. What are the current weather parameters in Cornwall today?
Here is a complete overview of Cornwall's current weather conditions as of 04:00 PM 26 September 2026: Condition : Overcast Temperature : 21°C Pleasant (Feels like 18°C) Humidity : 52% Wind Speed : 16.2 km/h from NE (45 degrees), Gust 8.8 m/s UV Index : 1.4 (Low Air Pressure : 1017 mb Cloud Cover : 100% Visibility : 10 km Precipitation : 0 mm (13% chance of rain)
3. What is the 10-day weather forecast for Cornwall from 04:00 PM 26 September 2026?
3. What is the 10-day weather forecast for Cornwall from 04:00 PM 26 September 2026?
From 04:00 PM 26 September 2026, Cornwall's 10-day forecast shows this trend: Today (Sep. 26) : Temp. 15°C, Hum. 69% and Overcast condition. Sunday (Sep. 27) : Temp. 15°C, Hum. 64% and Overcast condition. Monday (Sep. 28) : Temp. 14°C, Hum. 81% and Overcast condition. Tuesday (Sep. 29) : Temp. 12°C, Hum. 88% and Overcast condition. Wednesday (Sep. 30) : Temp. 15°C, Hum. 86% and Overcast condition. Thursday (Oct. 1) : Temp. 18°C, Hum. 79% and Overcast condition. Friday (Oct. 2) : Temp. 23°C, Hum. 63% and Overcast condition. Saturday (Oct. 3) : Temp. 16°C, Hum. 65% and Sunny condition. Sunday (Oct. 4) : Temp. 13°C, Hum. 80% and Rain Showers condition. Monday (Oct. 5) : Temp. 13°C, Hum. 75% and Rain condition.
4. Will it rain in Cornwall today?
4. Will it rain in Cornwall today?
As of 04:00 PM 26 September 2026, there is a 12% chance of rainfall in Cornwall later today around 2026-09-26 16:00. Current precipitation is 0 mm. Residents are advised to carry an umbrella before heading out.
5. What is the monthly weather forecast for Cornwall in September 2026?
5. What is the monthly weather forecast for Cornwall in September 2026?
September 2026 in Cornwall is forecast to have 14 sunny days, 2 rainy days, 0 cloudy days, and 0 snowy days. Temperatures for the month range from lows around 5°C to highs of 28°C.
6. How does the weather in Cornwall affect air quality?
6. How does the weather in Cornwall affect air quality?
Weather directly impacts air quality in Cornwall. Calm winds, high humidity, fog, and high pressure trap pollutants near the ground, worsening AQI. Strong winds, rainfall, and low pressure help disperse them. Rising temperatures and UV levels intensify ozone and smog formation, while poor visibility signals elevated particulate matter. Monitoring weather alongside AQI gives the clearest picture of outdoor safety.
