Hourly Weather Forecast - Thornton, Ontario, CA

3 AM
23°F
30%
18mph
W
30% Chance of Snow
Humidity
74%
Feels like
9°F
Dew Point
16°F
4 AM
21°F
10%
17mph
W
Partly Cloudy
Humidity
75%
Feels like
7°F
Dew Point
15°F
5 AM
21°F
10%
17mph
W
Partly Cloudy
Humidity
76%
Feels like
6°F
Dew Point
14°F
6 AM
21°F
30%
16mph
W
30% Chance Freezing Rain
Humidity
75%
Feels like
7°F
Dew Point
14°F
7 AM
21°F
30%
16mph
W
30 % Chance of Heavy Snow
Humidity
75%
Feels like
8°F
Dew Point
15°F
7:51 AM
8 AM
22°F
30%
16mph
W
30% Chance of Heavy Snow
Humidity
75%
Feels like
9°F
Dew Point
16°F
9 AM
23°F
30%
16mph
W
30% Chance of Heavy Snow
Humidity
73%
Feels like
10°F
Dew Point
16°F
10 AM
24°F
30%
16mph
W
30% Chance of Heavy Snow
Humidity
71%
Feels like
11°F
Dew Point
16°F
11 AM
25°F
30%
16mph
WNW
30% Chance of Heavy Snow
Humidity
71%
Feels like
12°F
Dew Point
17°F
12 PM
24°F
30%
15mph
WNW
30% Chance of Heavy Snow
Humidity
72%
Feels like
12°F
Dew Point
17°F
1 PM
24°F
30%
16mph
WNW
30% Chance of Snow
Humidity
72%
Feels like
11°F
Dew Point
16°F
2 PM
24°F
10%
16mph
WNW
Mostly Cloudy
Humidity
73%
Feels like
10°F
Dew Point
16°F
3 PM
23°F
10%
15mph
NW
Mostly Cloudy
Humidity
73%
Feels like
10°F
Dew Point
16°F
4 PM
23°F
10%
14mph
NW
Mostly Cloudy
Humidity
72%
Feels like
10°F
Dew Point
15°F
4:42 PM
5 PM
22°F
10%
12mph
NW
Partly Cloudy
Humidity
72%
Feels like
11°F
Dew Point
15°F
6 PM
22°F
10%
10mph
NW
Partly Cloudy
Humidity
73%
Feels like
11°F
Dew Point
14°F
7 PM
21°F
10%
9mph
WNW
Partly Cloudy
Humidity
74%
Feels like
11°F
Dew Point
14°F
8 PM
21°F
0%
8mph
WNW
Partly Cloudy
Humidity
74%
Feels like
12°F
Dew Point
14°F
9 PM
21°F
0%
7mph
WNW
Partly Cloudy
Humidity
76%
Feels like
13°F
Dew Point
15°F
10 PM
21°F
30%
6mph
W
30% Chance of Snow
Humidity
78%
Feels like
13°F
Dew Point
15°F
11 PM
21°F
30%
6mph
WSW
30% Chance of Snow
Humidity
79%
Feels like
13°F
Dew Point
16°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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