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
Now
22°C72°F
623
71
10:00
23°C73°F
624
69
11:00
24°C75°F
825
65
12:00
25°C77°F
825
62
13:00
26°C79°F
725
60
14:00
26°C80°F
724
57
15:00
27°C80°F
724
55
16:00
27°C80°F
825
53
17:00
27°C80°F
725
57
18:00
25°C77°F
0.90.04
1036
69
19:00
23°C74°F
1.00.04
624
81
20:00
22°C72°F
312
85
21:00
21°C70°F
212
89
22:00
20°C69°F
312
91
23:00
20°C68°F
312
94
00:00
19°C66°F
211
97
01:00
19°C65°F
211
100
02:00
18°C65°F
211
100
03:00
18°C64°F
312
100
04:00
18°C64°F
513
100
05:00
17°C63°F
413
100
06:00
17°C63°F
312
99
07:00
18°C65°F
413
95
08:00
20°C68°F
412
90
09:00
22°C71°F
624
83
10:00
23°C73°F
0.20.01
725
79
11:00
23°C74°F
0.50.02
724
79
12:00
24°C76°F
0.20.01
413
77
13:00
25°C77°F
0.10.00
513
74
14:00
25°C77°F
0.40.01
624
75
15:00
24°C76°F
1.40.05
624
80
16:00
25°C76°F
0.60.02
413
77
17:00
25°C77°F
0.10.00
513
72
18:00
24°C75°F
0.30.01
724
76
19:00
24°C74°F
0.20.01
513
80
20:00
23°C73°F
312
87
21:00
21°C70°F
312
92
22:00
21°C69°F
312
94
23:00
20°C68°F
312
95
00:00
19°C66°F
412
98
03:00
18°C64°F
312
100
06:00
17°C63°F
312
99
09:00
23°C73°F
623
81
12:00
25°C77°F
513
72
15:00
26°C78°F
624
68
18:00
23°C74°F
1.80.07
413
86
21:00
21°C70°F
2.20.09
412
95
mminkm/hm/smphHumidity %
Daily Forecast
Today2.1 mm0.08 inSW 10 km/h3 m/s6 mph(gusts 27817)71%UV 25hTodayThunderstorm71%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
Thunderstorm
71%
SW 10 km/h3 m/s6 mph (gusts 27817)
2.1 mm0.08 in
UV 2
5h
Today — Hourly Forecast
Now
22°C72°F
623
10:00
23°C73°F
624
11:00
24°C75°F
825
12:00
25°C77°F
825
13:00
26°C79°F
725
14:00
26°C80°F
724
15:00
27°C80°F
724
16:00
27°C80°F
825
17:00
27°C80°F
725
18:00
25°C77°F
1036
19:00
23°C74°F
624
20:00
22°C72°F
312
21:00
21°C70°F
212
22:00
20°C69°F
312
23:00
20°C68°F
312
05:3714.9h20:33
Tomorrow4.0 mm0.16 inSW 7 km/h2 m/s5 mph(gusts 21613)88%UV 12hTomorrowThunderstorm88%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
Thunderstorm
88%
SW 7 km/h2 m/s5 mph (gusts 21613)
4.0 mm0.16 in
UV 1
2h
Tomorrow — Hourly Forecast
00:00
19°C66°F
211
01:00
19°C65°F
211
02:00
18°C65°F
211
03:00
18°C64°F
312
04:00
18°C64°F
513
05:00
17°C63°F
413
06:00
17°C63°F
312
07:00
18°C65°F
413
08:00
20°C68°F
412
09:00
22°C71°F
624
10:00
23°C73°F
725
11:00
23°C74°F
724
12:00
24°C76°F
413
13:00
25°C77°F
513
14:00
25°C77°F
624
15:00
24°C76°F
624
16:00
25°C76°F
413
17:00
25°C77°F
513
18:00
24°C75°F
724
19:00
24°C74°F
513
20:00
23°C73°F
312
21:00
21°C70°F
312
22:00
21°C69°F
312
23:00
20°C68°F
312
05:3814.9h20:32
Tuesday6.8 mm0.27 in· heavyE 6 km/h2 m/s4 mph(gusts 21613)87%UV 11hTuesdayThunderstorm87%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
Thunderstorm
87%
E 6 km/h2 m/s4 mph (gusts 21613)
6.8 mm0.27 in
UV 1
1h
Tuesday — Forecast Overview
00:00
19°C66°F
412
03:00
18°C64°F
312
06:00
17°C63°F
312
09:00
23°C73°F
623
12:00
25°C77°F
513
15:00
26°C78°F
624
18:00
23°C74°F
413
21:00
21°C70°F
412
05:3914.8h20:30
Wednesday4.5 mm0.18 inNE 14 km/h4 m/s8 mph(gusts 34921)95%UV 14hWednesdayDrizzle95%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
Drizzle
95%
NE 14 km/h4 m/s8 mph (gusts 34921)
4.5 mm0.18 in
UV 1
4h
Wednesday — Forecast Overview
00:00
20°C68°F
513
03:00
20°C68°F
624
06:00
19°C67°F
825
09:00
19°C65°F
724
12:00
19°C67°F
1137
15:00
19°C66°F
1348
18:00
19°C66°F
1238
21:00
17°C63°F
1348
05:4114.8h20:29
Thursday5.6 mm0.22 in· heavyNE 15 km/h4 m/s9 mph(gusts 371023)87%UV 111hThursdayDrizzle87%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
Drizzle
87%
NE 15 km/h4 m/s9 mph (gusts 371023)
5.6 mm0.22 in
UV 1
11h
Thursday — Forecast Overview
00:00
17°C63°F
1036
03:00
18°C64°F
724
06:00
18°C64°F
926
09:00
18°C65°F
825
12:00
22°C71°F
1036
15:00
25°C76°F
936
18:00
25°C77°F
1036
21:00
20°C68°F
623
05:4214.8h20:28
FridaySW 7 km/h2 m/s4 mph(gusts 17511)76%UV 112hFridayPartly cloudy76%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
Partly cloudy
76%
SW 7 km/h2 m/s4 mph (gusts 17511)
UV 1
12h
Night18°C64°F
18°C64°FMorning18°C65°F
18°C65°FAfternoon30°C86°F
30°C86°FEvening22°C71°F
22°C71°F05:4314.7h20:27
SaturdaySW 12 km/h3 m/s7 mph(gusts 28818)66%UV 26hSaturdayOvercast66%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
Overcast
66%
SW 12 km/h3 m/s7 mph (gusts 28818)
UV 2
6h
Night20°C69°F
20°C69°FMorning28°C82°F
28°C82°FAfternoon28°C82°F
28°C82°FEvening27°C81°F
27°C81°F05:4414.7h20:26
Sunday2.6 mm0.10 inNW 8 km/h2 m/s5 mph(gusts 19512)86%UV 18hSundayLight rain86%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
Light rain
86%
NW 8 km/h2 m/s5 mph (gusts 19512)
2.6 mm0.10 in
UV 1
8h
Night22°C72°F
22°C72°FMorning23°C73°F
23°C73°FAfternoon23°C73°F
23°C73°FEvening21°C70°F
21°C70°F05:4514.7h20:24
Extended Forecast (GFS)MondayNE 9 km/h2 m/s5 mph80%15hMondayDrizzle80%NE 9 km/h2 m/s5 mph15h
Monday
NE 9 km/h2 m/s5 mph80%15h
Monday
Drizzle
80%
NE 9 km/h2 m/s5 mph
15h
Night17°C63°F
17°C63°FMorning24°C75°F
24°C75°FAfternoon24°C75°F
24°C75°FEvening22°C71°F
22°C71°F05:4614.6h20:23
TuesdaySW 10 km/h3 m/s6 mph73%15hTuesdayClear73%SW 10 km/h3 m/s6 mph15h
Tuesday
SW 10 km/h3 m/s6 mph73%15h
Tuesday
Clear
73%
SW 10 km/h3 m/s6 mph
15h
Night17°C62°F
17°C62°FMorning26°C79°F
26°C79°FAfternoon26°C79°F
26°C79°FEvening23°C74°F
23°C74°F05:4714.6h20:22
WednesdaySW 16 km/h4 m/s10 mph(gusts 28818)67%15hWednesdayClear67%SW 16 km/h4 m/s10 mph (gusts 28818)15h
Wednesday
SW 16 km/h4 m/s10 mph(gusts 28818)67%15h
Wednesday
Clear
67%
SW 16 km/h4 m/s10 mph (gusts 28818)
15h
Night19°C65°F
19°C65°FMorning29°C84°F
29°C84°FAfternoon29°C84°F
29°C84°FEvening25°C77°F
25°C77°F05:4914.5h20:20
Thursday14.8 mm0.58 in· heavyS 22 km/h6 m/s14 mph(gusts 551534)82%12hThursdayLight rain82%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
Light rain
82%
S 22 km/h6 m/s14 mph (gusts 551534)
14.8 mm0.58 in
12h
Night21°C69°F
21°C69°FMorning26°C78°F
26°C78°FAfternoon26°C78°F
26°C78°FEvening23°C73°F
23°C73°F05:5014.5h20:19
FridayW 21 km/h6 m/s13 mph(gusts 371023)65%14hFridayClear65%W 21 km/h6 m/s13 mph (gusts 371023)14h
Friday
W 21 km/h6 m/s13 mph(gusts 371023)65%14h
Friday
Clear
65%
W 21 km/h6 m/s13 mph (gusts 371023)
14h
Night14°C57°F
14°C57°FMorning17°C62°F
17°C62°FAfternoon17°C62°F
17°C62°FEvening15°C60°F
15°C60°F05:5114.4h20:18
SaturdayE 10 km/h3 m/s6 mph(gusts 19512)68%14hSaturdayClear68%E 10 km/h3 m/s6 mph (gusts 19512)14h
Saturday
E 10 km/h3 m/s6 mph(gusts 19512)68%14h
Saturday
Clear
68%
E 10 km/h3 m/s6 mph (gusts 19512)
14h
Night10°C50°F
10°C50°FMorning21°C69°F
21°C69°FAfternoon21°C69°F
21°C69°FEvening17°C63°F
17°C63°F05:5214.4h20:16
SundayE 8 km/h2 m/s5 mph(gusts 16410)66%14hSundayDrizzle66%E 8 km/h2 m/s5 mph (gusts 16410)14h
Sunday
E 8 km/h2 m/s5 mph(gusts 16410)66%14h
Sunday
Drizzle
66%
E 8 km/h2 m/s5 mph (gusts 16410)
14h
Night13°C55°F
13°C55°FMorning23°C73°F
23°C73°FAfternoon23°C73°F
23°C73°FEvening22°C71°F
22°C71°F05:5314.4h20:15
Monday8.4 mm0.33 in· heavyS 12 km/h3 m/s7 mph(gusts 421226)93%10hMondayRain93%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
Rain
93%
S 12 km/h3 m/s7 mph (gusts 421226)
8.4 mm0.33 in
10h
Night19°C66°F
19°C66°FMorning18°C65°F
18°C65°FAfternoon18°C65°F
18°C65°FEvening16°C61°F
16°C61°F05:5414.3h20:13
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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