Hourly Weather Forecast - Thornton, Ontario, CA

12 AM
32°F
30%
8mph
SE
30% Chance of Flurries
Humidity
87%
Feels like
25°F
Dew Point
28°F
1 AM
31°F
30%
8mph
SE
30% Chance of Flurries
Humidity
89%
Feels like
24°F
Dew Point
29°F
2 AM
31°F
30%
8mph
SE
30% Chance Frozen Mix
Humidity
90%
Feels like
24°F
Dew Point
29°F
3 AM
31°F
30%
9mph
SE
30% Chance Frozen Mix
Humidity
93%
Feels like
23°F
Dew Point
29°F
4 AM
30°F
30%
8mph
SE
30% Chance Frozen Mix
Humidity
92%
Feels like
23°F
Dew Point
28°F
5 AM
30°F
30%
4mph
SE
30% Chance Frozen Mix
Humidity
94%
Feels like
26°F
Dew Point
28°F
6 AM
30°F
30%
1mph
NNW
30% Chance Frozen Mix
Humidity
95%
Feels like
30°F
Dew Point
29°F
7 AM
30°F
30%
5mph
NNW
30% Chance Frozen Mix
Humidity
96%
Feels like
25°F
Dew Point
29°F
7:53 AM
8 AM
31°F
30%
6mph
NNW
30% Chance Frozen Mix
Humidity
95%
Feels like
24°F
Dew Point
29°F
9 AM
31°F
30%
6mph
NNW
30% Chance Frozen Mix
Humidity
92%
Feels like
25°F
Dew Point
29°F
10 AM
31°F
30%
7mph
NNW
30% Chance Frozen Mix
Humidity
92%
Feels like
25°F
Dew Point
29°F
11 AM
31°F
30%
7mph
NNW
30% Chance Freezing Rain
Humidity
91%
Feels like
24°F
Dew Point
29°F
12 PM
31°F
30%
8mph
NNW
30% Chance Freezing Rain
Humidity
88%
Feels like
24°F
Dew Point
28°F
1 PM
31°F
30%
8mph
NNW
30% Chance Freezing Rain
Humidity
86%
Feels like
23°F
Dew Point
27°F
2 PM
30°F
30%
9mph
NNW
30% Chance Frozen Mix
Humidity
86%
Feels like
22°F
Dew Point
26°F
3 PM
29°F
10%
10mph
NNW
Cloudy
Humidity
83%
Feels like
20°F
Dew Point
24°F
4 PM
28°F
10%
10mph
NNW
Cloudy
Humidity
81%
Feels like
19°F
Dew Point
23°F
4:45 PM
5 PM
28°F
20%
10mph
NNW
Cloudy
Humidity
80%
Feels like
18°F
Dew Point
22°F
6 PM
27°F
20%
9mph
NNW
Cloudy
Humidity
80%
Feels like
18°F
Dew Point
22°F
7 PM
26°F
30%
9mph
NNW
30% Chance of Flurries
Humidity
78%
Feels like
17°F
Dew Point
20°F
8 PM
25°F
30%
8mph
NNW
30% Chance of Flurries
Humidity
77%
Feels like
16°F
Dew Point
19°F
9 PM
24°F
30%
8mph
NNW
30% Chance of Flurries
Humidity
77%
Feels like
15°F
Dew Point
18°F
10 PM
23°F
30%
7mph
N
30% Chance of Flurries
Humidity
77%
Feels like
14°F
Dew Point
17°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into 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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