Hourly Weather Forecast - Cornwall, Ontario, CA

1 PM
19°F
0%
5mph
S
Mostly Cloudy
Humidity
69%
Feels like
11°F
Dew Point
10°F
2 PM
20°F
0%
5mph
SSE
Mostly Cloudy
Humidity
68%
Feels like
13°F
Dew Point
11°F
3 PM
19°F
0%
4mph
SE
Mostly Cloudy
Humidity
68%
Feels like
13°F
Dew Point
11°F
4 PM
19°F
30%
4mph
ESE
30% Chance of Flurries
Humidity
69%
Feels like
12°F
Dew Point
10°F
4:17 PM
5 PM
19°F
30%
4mph
ESE
30% Chance of Flurries
Humidity
69%
Feels like
12°F
Dew Point
10°F
6 PM
19°F
30%
4mph
SE
30% Chance of Snow
Humidity
68%
Feels like
13°F
Dew Point
10°F
7 PM
19°F
30%
4mph
SSE
30% Chance of Snow
Humidity
68%
Feels like
13°F
Dew Point
10°F
8 PM
20°F
30%
5mph
SSE
30 % Chance of Heavy Snow
Humidity
71%
Feels like
13°F
Dew Point
12°F
9 PM
20°F
30%
6mph
SSE
30 % Chance of Heavy Snow
Humidity
75%
Feels like
13°F
Dew Point
14°F
10 PM
21°F
30%
6mph
SSE
30 % Chance of Heavy Snow
Humidity
78%
Feels like
13°F
Dew Point
15°F
11 PM
22°F
30%
6mph
S
30% Chance of Snow
Humidity
79%
Feels like
14°F
Dew Point
17°F

Rainfall Forecast for Northwest through Thursday

Heavy Rain, Flooding Soaks The Northwest

A fast-moving series of atmospheric rivers continue to drench the Pacific Northwest today through Thursday.

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

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Weather Cameras

Outdoor Sports Guide