Hourly Weather Forecast - Cornwall, Ontario, CA

11 AM
19°F
0%
6mph
NW
Partly Cloudy
Humidity
54%
Feels like
12°F
Dew Point
6°F
12 PM
20°F
0%
7mph
NW
Partly Cloudy
Humidity
51%
Feels like
11°F
Dew Point
4°F
1 PM
19°F
0%
7mph
NW
Partly Cloudy
Humidity
49%
Feels like
10°F
Dew Point
3°F
2 PM
18°F
0%
8mph
NW
Partly Cloudy
Humidity
51%
Feels like
8°F
Dew Point
2°F
3 PM
15°F
0%
8mph
WNW
Mostly Sunny
Humidity
55%
Feels like
4°F
Dew Point
2°F
4 PM
12°F
0%
8mph
WNW
Mostly Sunny
Humidity
62%
Feels like
0°F
Dew Point
1°F
4:17 PM
5 PM
9°F
0%
8mph
WNW
Clear
Humidity
68%
Feels like
-3°F
Dew Point
0°F
6 PM
7°F
0%
7mph
W
Mostly Clear
Humidity
72%
Feels like
-5°F
Dew Point
0°F
7 PM
5°F
0%
6mph
W
Mostly Cloudy
Humidity
74%
Feels like
-6°F
Dew Point
-1°F
8 PM
4°F
0%
6mph
W
Mostly Cloudy
Humidity
77%
Feels like
-7°F
Dew Point
-1°F
9 PM
4°F
0%
6mph
WNW
Mostly Cloudy
Humidity
82%
Feels like
-8°F
Dew Point
-1°F
10 PM
2°F
0%
6mph
WNW
Mostly Cloudy
Humidity
87%
Feels like
-10°F
Dew Point
0°F
11 PM
2°F
30%
7mph
W
30% Chance of Snow
Humidity
86%
Feels like
-10°F
Dew Point
-1°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Sunday Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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