Hourly Weather Forecast - Sarnia, Ontario, CA

12 AM
39°F
30%
14mph
SW
30% Chance of Light Rain
Humidity
85%
Feels like
30°F
Dew Point
34°F
1 AM
37°F
40%
14mph
WSW
40% Chance of Light Rain
Humidity
82%
Feels like
28°F
Dew Point
32°F
2 AM
35°F
30%
13mph
WSW
30% Chance of Light Rain
Humidity
81%
Feels like
25°F
Dew Point
29°F
3 AM
33°F
20%
13mph
WSW
Cloudy
Humidity
77%
Feels like
23°F
Dew Point
26°F
4 AM
31°F
20%
14mph
WSW
Cloudy
Humidity
75%
Feels like
21°F
Dew Point
25°F
5 AM
31°F
20%
15mph
WSW
Cloudy
Humidity
75%
Feels like
20°F
Dew Point
23°F
6 AM
29°F
20%
16mph
WSW
Cloudy
Humidity
72%
Feels like
18°F
Dew Point
22°F
7 AM
29°F
20%
17mph
W
Mostly Cloudy
Humidity
70%
Feels like
17°F
Dew Point
20°F
7:56 AM
8 AM
28°F
10%
17mph
W
Mostly Cloudy
Humidity
70%
Feels like
16°F
Dew Point
20°F
9 AM
29°F
10%
17mph
W
Mostly Cloudy
Humidity
71%
Feels like
16°F
Dew Point
20°F
10 AM
29°F
10%
18mph
W
Mostly Cloudy
Humidity
72%
Feels like
16°F
Dew Point
21°F
11 AM
28°F
10%
19mph
W
Mostly Cloudy
Humidity
68%
Feels like
15°F
Dew Point
19°F
12 PM
28°F
20%
19mph
W
Partly Cloudy
Humidity
60%
Feels like
15°F
Dew Point
16°F
1 PM
27°F
10%
19mph
W
Partly Cloudy
Humidity
56%
Feels like
14°F
Dew Point
13°F
2 PM
26°F
10%
19mph
WNW
Mostly Cloudy
Humidity
53%
Feels like
13°F
Dew Point
12°F
3 PM
25°F
0%
19mph
WNW
Mostly Cloudy
Humidity
53%
Feels like
11°F
Dew Point
10°F
4 PM
24°F
10%
18mph
WNW
Mostly Cloudy
Humidity
54%
Feels like
11°F
Dew Point
10°F
4:56 PM
5 PM
24°F
10%
17mph
WNW
Mostly Cloudy
Humidity
55%
Feels like
10°F
Dew Point
10°F
6 PM
23°F
10%
15mph
WNW
Partly Cloudy
Humidity
57%
Feels like
10°F
Dew Point
10°F
7 PM
22°F
10%
14mph
WNW
Partly Cloudy
Humidity
58%
Feels like
9°F
Dew Point
10°F
8 PM
21°F
10%
13mph
WNW
Partly Cloudy
Humidity
60%
Feels like
9°F
Dew Point
10°F
9 PM
21°F
0%
11mph
WNW
Partly Cloudy
Humidity
62%
Feels like
9°F
Dew Point
10°F
10 PM
21°F
0%
10mph
W
Mostly Cloudy
Humidity
62%
Feels like
10°F
Dew Point
10°F
11 PM
21°F
0%
9mph
W
Mostly Cloudy
Humidity
61%
Feels like
11°F
Dew Point
10°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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