Cornwall — Weather
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22°C72°F· Overcast · 96% cloud cover
Feels like 23°C74°F · Low 20°C68°F · High 27°C80°F
Wind
6 km/h2 m/s3 mph from SW
Humidity
71%
Pressure
1012 hPa29.89 inHgstable
UV Index
0.4Low
Unsettled — rain + thunderstorms
Cornwall at a glance: 22°C72°F, overcast.
⛈️ Extended wet spell, moderate-intensity Sunday–Thursday, with rain and embedded thunderstorms. Total ~22.9 mm. Peak Tuesday (6.8 mm). Typical for the month (normal ~92 mm/month).
🔥 Today's high of 27°C81°F sits 6.1°C34°F markedly warmer than the July mean (21°C70°F).
🌧️ Rain expected from 18:00.
Hourly forecast
Detailed forecast for the next 60 hours
TemperaturePrecipitationWind
CAPE (J/kg)Instability Threshold
mminkm/hm/smphHumidity %
Daily Forecast
Today2.1 mm0.08 inSW 10 km/h3 m/s6 mph(gusts 27817)71%UV 25hToday71%SW 10 km/h3 m/s6 mph (gusts 27817)2.1 mm0.08 inUV 25h
Today
2.1 mm0.08 inSW 10 km/h3 m/s6 mph(gusts 27817)71%UV 25h
Today
71%
SW 10 km/h3 m/s6 mph (gusts 27817)
2.1 mm0.08 in
UV 2
5h
Today — Hourly Forecast
05:3714.9h20:33
Tomorrow4.0 mm0.16 inSW 7 km/h2 m/s5 mph(gusts 21613)88%UV 12hTomorrow88%SW 7 km/h2 m/s5 mph (gusts 21613)4.0 mm0.16 inUV 12h
Tomorrow
4.0 mm0.16 inSW 7 km/h2 m/s5 mph(gusts 21613)88%UV 12h
Tomorrow
88%
SW 7 km/h2 m/s5 mph (gusts 21613)
4.0 mm0.16 in
UV 1
2h
Tomorrow — Hourly Forecast
05:3814.9h20:32
Tuesday6.8 mm0.27 in· heavyE 6 km/h2 m/s4 mph(gusts 21613)87%UV 11hTuesday87%E 6 km/h2 m/s4 mph (gusts 21613)6.8 mm0.27 inUV 11h
Tuesday
6.8 mm0.27 in· heavyE 6 km/h2 m/s4 mph(gusts 21613)87%UV 11h
Tuesday
87%
E 6 km/h2 m/s4 mph (gusts 21613)
6.8 mm0.27 in
UV 1
1h
Tuesday — Forecast Overview
05:3914.8h20:30
Wednesday4.5 mm0.18 inNE 14 km/h4 m/s8 mph(gusts 34921)95%UV 14hWednesday95%NE 14 km/h4 m/s8 mph (gusts 34921)4.5 mm0.18 inUV 14h
Wednesday
4.5 mm0.18 inNE 14 km/h4 m/s8 mph(gusts 34921)95%UV 14h
Wednesday
95%
NE 14 km/h4 m/s8 mph (gusts 34921)
4.5 mm0.18 in
UV 1
4h
Wednesday — Forecast Overview
05:4114.8h20:29
Thursday5.6 mm0.22 in· heavyNE 15 km/h4 m/s9 mph(gusts 371023)87%UV 111hThursday87%NE 15 km/h4 m/s9 mph (gusts 371023)5.6 mm0.22 inUV 111h
Thursday
5.6 mm0.22 in· heavyNE 15 km/h4 m/s9 mph(gusts 371023)87%UV 111h
Thursday
87%
NE 15 km/h4 m/s9 mph (gusts 371023)
5.6 mm0.22 in
UV 1
11h
Thursday — Forecast Overview
05:4214.8h20:28
FridaySW 7 km/h2 m/s4 mph(gusts 17511)76%UV 112hFriday76%SW 7 km/h2 m/s4 mph (gusts 17511)UV 112h
Friday
SW 7 km/h2 m/s4 mph(gusts 17511)76%UV 112h
Friday
76%
SW 7 km/h2 m/s4 mph (gusts 17511)
UV 1
12h
Night
18°C64°F
Morning
18°C65°F
Afternoon
30°C86°F
Evening
22°C71°F
05:4314.7h20:27
SaturdaySW 12 km/h3 m/s7 mph(gusts 28818)66%UV 26hSaturday66%SW 12 km/h3 m/s7 mph (gusts 28818)UV 26h
Saturday
SW 12 km/h3 m/s7 mph(gusts 28818)66%UV 26h
Saturday
66%
SW 12 km/h3 m/s7 mph (gusts 28818)
UV 2
6h
Night
20°C69°F
Morning
28°C82°F
Afternoon
28°C82°F
Evening
27°C81°F
05:4414.7h20:26
Sunday2.6 mm0.10 inNW 8 km/h2 m/s5 mph(gusts 19512)86%UV 18hSunday86%NW 8 km/h2 m/s5 mph (gusts 19512)2.6 mm0.10 inUV 18h
Sunday
2.6 mm0.10 inNW 8 km/h2 m/s5 mph(gusts 19512)86%UV 18h
Sunday
86%
NW 8 km/h2 m/s5 mph (gusts 19512)
2.6 mm0.10 in
UV 1
8h
Night
22°C72°F
Morning
23°C73°F
Afternoon
23°C73°F
Evening
21°C70°F
05:4514.7h20:24
MondayNE 9 km/h2 m/s5 mph80%15hMonday80%NE 9 km/h2 m/s5 mph15h
Monday
NE 9 km/h2 m/s5 mph80%15h
Monday
80%
NE 9 km/h2 m/s5 mph
15h
Night
17°C63°F
Morning
24°C75°F
Afternoon
24°C75°F
Evening
22°C71°F
05:4614.6h20:23
TuesdaySW 10 km/h3 m/s6 mph73%15hTuesday73%SW 10 km/h3 m/s6 mph15h
Tuesday
SW 10 km/h3 m/s6 mph73%15h
Tuesday
73%
SW 10 km/h3 m/s6 mph
15h
Night
17°C62°F
Morning
26°C79°F
Afternoon
26°C79°F
Evening
23°C74°F
05:4714.6h20:22
WednesdaySW 16 km/h4 m/s10 mph(gusts 28818)67%15hWednesday67%SW 16 km/h4 m/s10 mph (gusts 28818)15h
Wednesday
SW 16 km/h4 m/s10 mph(gusts 28818)67%15h
Wednesday
67%
SW 16 km/h4 m/s10 mph (gusts 28818)
15h
Night
19°C65°F
Morning
29°C84°F
Afternoon
29°C84°F
Evening
25°C77°F
05:4914.5h20:20
Thursday14.8 mm0.58 in· heavyS 22 km/h6 m/s14 mph(gusts 551534)82%12hThursday82%S 22 km/h6 m/s14 mph (gusts 551534)14.8 mm0.58 in12h
Thursday
14.8 mm0.58 in· heavyS 22 km/h6 m/s14 mph(gusts 551534)82%12h
Thursday
82%
S 22 km/h6 m/s14 mph (gusts 551534)
14.8 mm0.58 in
12h
Night
21°C69°F
Morning
26°C78°F
Afternoon
26°C78°F
Evening
23°C73°F
05:5014.5h20:19
FridayW 21 km/h6 m/s13 mph(gusts 371023)65%14hFriday65%W 21 km/h6 m/s13 mph (gusts 371023)14h
Friday
W 21 km/h6 m/s13 mph(gusts 371023)65%14h
Friday
65%
W 21 km/h6 m/s13 mph (gusts 371023)
14h
Night
14°C57°F
Morning
17°C62°F
Afternoon
17°C62°F
Evening
15°C60°F
05:5114.4h20:18
SaturdayE 10 km/h3 m/s6 mph(gusts 19512)68%14hSaturday68%E 10 km/h3 m/s6 mph (gusts 19512)14h
Saturday
E 10 km/h3 m/s6 mph(gusts 19512)68%14h
Saturday
68%
E 10 km/h3 m/s6 mph (gusts 19512)
14h
Night
10°C50°F
Morning
21°C69°F
Afternoon
21°C69°F
Evening
17°C63°F
05:5214.4h20:16
SundayE 8 km/h2 m/s5 mph(gusts 16410)66%14hSunday66%E 8 km/h2 m/s5 mph (gusts 16410)14h
Sunday
E 8 km/h2 m/s5 mph(gusts 16410)66%14h
Sunday
66%
E 8 km/h2 m/s5 mph (gusts 16410)
14h
Night
13°C55°F
Morning
23°C73°F
Afternoon
23°C73°F
Evening
22°C71°F
05:5314.4h20:15
Monday8.4 mm0.33 in· heavyS 12 km/h3 m/s7 mph(gusts 421226)93%10hMonday93%S 12 km/h3 m/s7 mph (gusts 421226)8.4 mm0.33 in10h
Monday
8.4 mm0.33 in· heavyS 12 km/h3 m/s7 mph(gusts 421226)93%10h
Monday
93%
S 12 km/h3 m/s7 mph (gusts 421226)
8.4 mm0.33 in
10h
Night
19°C66°F
Morning
18°C65°F
Afternoon
18°C65°F
Evening
16°C61°F
05:5414.3h20:13
Sunrise
05:37
Civil Dawn 05:07
Sunset
20:33
Civil Dusk 21:03
Today vs. seasonal normal
+0.2°C+0.4°F
Cornwall is located in Ontario, Canada. Elevation: 57m. Annual average temperature: 6.2°C. Annual precipitation: 986mm.
Frequently Asked Questions
What is the weather like in Cornwall today?
Today in Cornwall, Canada, the temperature is 22°C with Overcast. The high is 27°C and the low is 20°C.
What is the 16-day forecast for Cornwall?
The 16-day forecast for Cornwall shows the warmest day is Wednesday at 32°C, while the coolest night is Saturday at 9°C. 10 day(s) have precipitation expected.
What time is sunrise and sunset in Cornwall?
In Cornwall, sunrise is at 05:37 and sunset is at 20:33. Day length is approximately 14h 55m.
How accurate is the weather forecast for Cornwall?
Our forecasts for Cornwall use the DWD ICON model, one of the world's most advanced weather prediction systems. Accuracy is typically 85-90% for 1-3 day forecasts. Cornwall has an annual average temperature of 6.2°C and receives 986mm of precipitation per year.
Last updated: 07/26/2026, 09:00 AM
July climate in Cornwall
Normals for July: average 21°C (15–27°C), around 92 mm of rain across the month. About 15°C warmer than the annual average of 6.2°C.
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