Hourly Weather Forecast - Sarnia, Ontario, CA

12 AM
33°F
40%
7mph
SSE
40% Chance of Light Rain
Humidity
83%
Feels like
27°F
Dew Point
29°F
1 AM
34°F
40%
7mph
SSE
40% Chance of Light Rain
Humidity
84%
Feels like
27°F
Dew Point
29°F
2 AM
34°F
30%
7mph
S
30% Chance of Light Rain
Humidity
85%
Feels like
28°F
Dew Point
30°F
3 AM
34°F
20%
6mph
S
Cloudy
Humidity
85%
Feels like
29°F
Dew Point
30°F
4 AM
35°F
10%
6mph
SSW
Cloudy
Humidity
86%
Feels like
30°F
Dew Point
31°F
5 AM
35°F
10%
5mph
S
Cloudy
Humidity
86%
Feels like
30°F
Dew Point
31°F
6 AM
34°F
10%
4mph
NE
Mostly Cloudy
Humidity
85%
Feels like
31°F
Dew Point
31°F
7 AM
35°F
20%
3mph
NE
Mostly Cloudy
Humidity
84%
Feels like
35°F
Dew Point
30°F
7:58 AM
8 AM
35°F
20%
2mph
ENE
Mostly Cloudy
Humidity
82%
Feels like
35°F
Dew Point
30°F
9 AM
37°F
20%
3mph
E
Mostly Cloudy
Humidity
79%
Feels like
37°F
Dew Point
31°F
10 AM
38°F
20%
3mph
ESE
Cloudy
Humidity
76%
Feels like
38°F
Dew Point
31°F
11 AM
39°F
10%
3mph
ESE
Cloudy
Humidity
74%
Feels like
38°F
Dew Point
32°F
12 PM
40°F
10%
4mph
SE
Mostly Cloudy
Humidity
73%
Feels like
38°F
Dew Point
32°F
1 PM
40°F
10%
4mph
SE
Mostly Cloudy
Humidity
73%
Feels like
38°F
Dew Point
33°F
2 PM
40°F
10%
4mph
SE
Mostly Cloudy
Humidity
74%
Feels like
37°F
Dew Point
33°F
3 PM
40°F
10%
4mph
SE
Cloudy
Humidity
76%
Feels like
37°F
Dew Point
33°F
4 PM
39°F
10%
5mph
SE
Cloudy
Humidity
79%
Feels like
36°F
Dew Point
33°F
5 PM
39°F
20%
5mph
SE
Cloudy
Humidity
81%
Feels like
35°F
Dew Point
33°F
5:00 PM
6 PM
38°F
30%
5mph
SE
30% Chance of Light Rain
Humidity
84%
Feels like
34°F
Dew Point
34°F
7 PM
38°F
40%
6mph
SSE
40% Chance of Light Rain
Humidity
85%
Feels like
34°F
Dew Point
34°F
8 PM
38°F
40%
6mph
SSE
40% Chance of Light Rain
Humidity
86%
Feels like
34°F
Dew Point
34°F
9 PM
38°F
40%
5mph
SSE
40% Chance of Light Rain
Humidity
87%
Feels like
34°F
Dew Point
34°F
10 PM
38°F
50%
5mph
SSE
50% Chance of Light Rain
Humidity
88%
Feels like
34°F
Dew Point
35°F
11 PM
38°F
40%
6mph
S
40% Chance of Light Rain
Humidity
89%
Feels like
34°F
Dew Point
35°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

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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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