Hourly Weather Forecast - Cornwall, Ontario, CA

4:17 PM
5 PM
19°F
10%
4mph
E
Mostly Cloudy
Humidity
66%
Feels like
13°F
Dew Point
10°F
6 PM
19°F
10%
4mph
ESE
Mostly Cloudy
Humidity
66%
Feels like
14°F
Dew Point
10°F
7 PM
19°F
30%
4mph
SE
30% Chance of Snow
Humidity
67%
Feels like
13°F
Dew Point
10°F
8 PM
20°F
40%
5mph
SSE
40% Chance of Heavy Snow
Humidity
71%
Feels like
13°F
Dew Point
12°F
9 PM
20°F
30%
5mph
SSE
30 % Chance of Heavy Snow
Humidity
76%
Feels like
13°F
Dew Point
14°F
10 PM
21°F
30%
6mph
SSE
30% Chance of Snow
Humidity
79%
Feels like
13°F
Dew Point
16°F
11 PM
22°F
30%
6mph
SSE
30 % Chance of Heavy Snow
Humidity
80%
Feels like
14°F
Dew Point
17°F

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Low pressure will produce a swath of snow from Minnesota to Maine into Thursday.

Rainfall Forecast for Northwest through Thursday

Heavy Rain, Flooding Soaks The Northwest

Wednesday's Weather Outlook

Wednesday'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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Outdoor Sports Guide