Hourly Weather Forecast - Sarnia, Ontario, CA

12 AM
21°F
0%
8mph
W
Partly Cloudy
Humidity
67%
Feels like
12°F
Dew Point
12°F
1 AM
20°F
0%
7mph
W
Partly Cloudy
Humidity
69%
Feels like
11°F
Dew Point
12°F
2 AM
19°F
0%
7mph
W
Partly Cloudy
Humidity
74%
Feels like
10°F
Dew Point
13°F
3 AM
19°F
10%
6mph
W
Mostly Cloudy
Humidity
78%
Feels like
10°F
Dew Point
13°F
4 AM
18°F
10%
6mph
W
Cloudy
Humidity
82%
Feels like
10°F
Dew Point
14°F
5 AM
18°F
10%
6mph
WSW
Cloudy
Humidity
84%
Feels like
10°F
Dew Point
14°F
6 AM
17°F
10%
5mph
WSW
Cloudy
Humidity
82%
Feels like
10°F
Dew Point
13°F
7 AM
18°F
10%
6mph
SW
Cloudy
Humidity
81%
Feels like
10°F
Dew Point
13°F
7:57 AM
8 AM
19°F
10%
6mph
SW
Cloudy
Humidity
77%
Feels like
11°F
Dew Point
13°F
9 AM
20°F
10%
6mph
SW
Cloudy
Humidity
74%
Feels like
12°F
Dew Point
13°F
10 AM
22°F
10%
7mph
SW
Cloudy
Humidity
70%
Feels like
14°F
Dew Point
14°F
11 AM
24°F
10%
7mph
SSW
Cloudy
Humidity
69%
Feels like
16°F
Dew Point
15°F
12 PM
26°F
30%
8mph
SSW
30% Chance of Heavy Snow
Humidity
65%
Feels like
18°F
Dew Point
16°F
1 PM
27°F
30%
8mph
SSW
30% Chance of Heavy Snow
Humidity
64%
Feels like
19°F
Dew Point
17°F
2 PM
28°F
20%
8mph
S
Cloudy
Humidity
65%
Feels like
20°F
Dew Point
18°F
3 PM
28°F
20%
8mph
S
Cloudy
Humidity
65%
Feels like
20°F
Dew Point
18°F
4 PM
28°F
20%
8mph
S
Cloudy
Humidity
66%
Feels like
20°F
Dew Point
18°F
4:58 PM
5 PM
28°F
20%
8mph
SSE
Cloudy
Humidity
68%
Feels like
20°F
Dew Point
19°F
6 PM
28°F
20%
8mph
SSE
Cloudy
Humidity
68%
Feels like
20°F
Dew Point
19°F
7 PM
28°F
20%
9mph
SSE
Cloudy
Humidity
70%
Feels like
20°F
Dew Point
20°F
8 PM
28°F
20%
8mph
SSE
Cloudy
Humidity
73%
Feels like
20°F
Dew Point
21°F
9 PM
29°F
20%
8mph
S
Cloudy
Humidity
74%
Feels like
21°F
Dew Point
21°F
10 PM
29°F
20%
8mph
S
Cloudy
Humidity
75%
Feels like
21°F
Dew Point
22°F
11 PM
29°F
20%
8mph
S
Mostly Cloudy
Humidity
76%
Feels like
21°F
Dew Point
22°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday'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

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