Hourly Weather Forecast - Sarnia, Ontario, CA

12 AM
33°F
0%
9mph
NW
Partly Cloudy
Humidity
77%
Feels like
25°F
Dew Point
27°F
1 AM
32°F
0%
9mph
NW
Partly Cloudy
Humidity
79%
Feels like
25°F
Dew Point
26°F
2 AM
32°F
0%
9mph
NW
Partly Cloudy
Humidity
80%
Feels like
24°F
Dew Point
26°F
3 AM
31°F
0%
9mph
NW
Partly Cloudy
Humidity
80%
Feels like
24°F
Dew Point
26°F
4 AM
31°F
0%
8mph
NW
Mostly Clear
Humidity
80%
Feels like
23°F
Dew Point
26°F
5 AM
31°F
0%
7mph
NW
Mostly Clear
Humidity
80%
Feels like
23°F
Dew Point
25°F
6 AM
30°F
0%
7mph
NW
Partly Cloudy
Humidity
80%
Feels like
23°F
Dew Point
25°F
7 AM
30°F
0%
6mph
NW
Partly Cloudy
Humidity
81%
Feels like
23°F
Dew Point
25°F
7:58 AM
8 AM
30°F
0%
5mph
WNW
Mostly Cloudy
Humidity
81%
Feels like
24°F
Dew Point
25°F
9 AM
31°F
0%
4mph
W
Mostly Cloudy
Humidity
80%
Feels like
26°F
Dew Point
25°F
10 AM
32°F
0%
4mph
WSW
Cloudy
Humidity
77%
Feels like
28°F
Dew Point
26°F
11 AM
33°F
0%
4mph
SSW
Mostly Cloudy
Humidity
74%
Feels like
30°F
Dew Point
26°F
12 PM
34°F
0%
4mph
S
Mostly Cloudy
Humidity
71%
Feels like
31°F
Dew Point
26°F
1 PM
35°F
0%
4mph
S
Partly Cloudy
Humidity
69%
Feels like
31°F
Dew Point
26°F
2 PM
35°F
0%
5mph
SSE
Partly Cloudy
Humidity
68%
Feels like
31°F
Dew Point
26°F
3 PM
35°F
0%
6mph
SSE
Partly Cloudy
Humidity
68%
Feels like
30°F
Dew Point
26°F
4 PM
35°F
0%
7mph
SSE
Partly Cloudy
Humidity
70%
Feels like
29°F
Dew Point
26°F
4:59 PM
5 PM
34°F
10%
7mph
SSE
Partly Cloudy
Humidity
71%
Feels like
28°F
Dew Point
26°F
6 PM
33°F
10%
7mph
SSE
Partly Cloudy
Humidity
76%
Feels like
27°F
Dew Point
26°F
7 PM
33°F
10%
7mph
SSE
Partly Cloudy
Humidity
78%
Feels like
26°F
Dew Point
27°F
8 PM
33°F
10%
8mph
SSE
Partly Cloudy
Humidity
81%
Feels like
26°F
Dew Point
27°F
9 PM
33°F
10%
8mph
SSE
Mostly Cloudy
Humidity
82%
Feels like
26°F
Dew Point
28°F
10 PM
34°F
20%
8mph
SSE
Cloudy
Humidity
83%
Feels like
27°F
Dew Point
29°F
11 PM
34°F
40%
7mph
SSE
40% Chance of Light Rain
Humidity
85%
Feels like
28°F
Dew Point
30°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California through Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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