Hourly Weather Forecast - Grimsby, Ontario, CA

12 PM
24°F
30%
13mph
WSW
30% Chance of Snow
Humidity
79%
Feels like
12°F
Dew Point
19°F
1 PM
25°F
70%
13mph
WSW
70% Chance of Flurries
Humidity
80%
Feels like
13°F
Dew Point
19°F
2 PM
25°F
70%
13mph
WSW
70% Chance Frozen Mix
Humidity
80%
Feels like
14°F
Dew Point
20°F
3 PM
26°F
20%
14mph
SW
Cloudy
Humidity
79%
Feels like
14°F
Dew Point
20°F
4 PM
26°F
10%
14mph
SW
Cloudy
Humidity
78%
Feels like
14°F
Dew Point
20°F
4:43 PM
5 PM
26°F
10%
14mph
SW
Mostly Cloudy
Humidity
77%
Feels like
15°F
Dew Point
20°F
6 PM
26°F
10%
14mph
SW
Mostly Cloudy
Humidity
77%
Feels like
14°F
Dew Point
19°F
7 PM
25°F
10%
13mph
WSW
Mostly Cloudy
Humidity
76%
Feels like
13°F
Dew Point
18°F
8 PM
24°F
10%
13mph
WSW
Mostly Cloudy
Humidity
76%
Feels like
12°F
Dew Point
17°F
9 PM
23°F
10%
12mph
WSW
Mostly Cloudy
Humidity
74%
Feels like
11°F
Dew Point
16°F
10 PM
22°F
10%
11mph
WSW
Mostly Cloudy
Humidity
73%
Feels like
10°F
Dew Point
14°F
11 PM
21°F
0%
11mph
WSW
Mostly Cloudy
Humidity
73%
Feels like
10°F
Dew Point
13°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's 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 person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

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

Cold Air Damming - Cause And Effects

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide