Hourly Weather Forecast - Thornton, Ontario, CA

12 AM
29°F
30%
6mph
S
30% Chance Freezing Rain
Humidity
84%
Feels like
22°F
Dew Point
24°F
1 AM
29°F
30%
6mph
S
30% Chance Frozen Mix
Humidity
86%
Feels like
22°F
Dew Point
25°F
2 AM
29°F
30%
6mph
S
30% Chance Frozen Mix
Humidity
88%
Feels like
22°F
Dew Point
25°F
3 AM
28°F
30%
6mph
S
30% Chance of Flurries
Humidity
89%
Feels like
22°F
Dew Point
25°F
4 AM
28°F
30%
5mph
S
30% Chance Frozen Mix
Humidity
89%
Feels like
22°F
Dew Point
25°F
5 AM
27°F
30%
5mph
SSE
30% Chance Frozen Mix
Humidity
92%
Feels like
21°F
Dew Point
25°F
6 AM
27°F
20%
4mph
SSE
Partly Cloudy
Humidity
91%
Feels like
21°F
Dew Point
24°F
7 AM
27°F
20%
4mph
SE
Partly Cloudy
Humidity
93%
Feels like
22°F
Dew Point
25°F
7:53 AM
8 AM
28°F
10%
4mph
SE
Hazy
Humidity
93%
Feels like
23°F
Dew Point
26°F
9 AM
29°F
10%
4mph
SE
Mostly Sunny
Humidity
90%
Feels like
24°F
Dew Point
27°F
10 AM
31°F
10%
4mph
SE
Partly Cloudy
Humidity
87%
Feels like
26°F
Dew Point
27°F
11 AM
32°F
10%
4mph
SE
Partly Cloudy
Humidity
84%
Feels like
28°F
Dew Point
28°F
12 PM
33°F
10%
5mph
ESE
Partly Cloudy
Humidity
83%
Feels like
28°F
Dew Point
28°F
1 PM
33°F
10%
5mph
ESE
Partly Cloudy
Humidity
84%
Feels like
28°F
Dew Point
29°F
2 PM
33°F
10%
5mph
ESE
Partly Cloudy
Humidity
83%
Feels like
28°F
Dew Point
29°F
3 PM
33°F
10%
6mph
ESE
Mostly Cloudy
Humidity
84%
Feels like
28°F
Dew Point
29°F
4 PM
33°F
10%
6mph
ESE
Cloudy
Humidity
85%
Feels like
27°F
Dew Point
29°F
4:44 PM
5 PM
33°F
10%
6mph
ESE
Cloudy
Humidity
87%
Feels like
27°F
Dew Point
29°F
6 PM
33°F
20%
7mph
ESE
Cloudy
Humidity
84%
Feels like
26°F
Dew Point
28°F
7 PM
33°F
20%
7mph
ESE
Cloudy
Humidity
82%
Feels like
26°F
Dew Point
28°F
8 PM
33°F
20%
7mph
SE
Cloudy
Humidity
80%
Feels like
27°F
Dew Point
28°F
9 PM
33°F
20%
8mph
SE
Cloudy
Humidity
80%
Feels like
27°F
Dew Point
28°F
10 PM
33°F
20%
8mph
SE
Cloudy
Humidity
81%
Feels like
26°F
Dew Point
28°F
11 PM
32°F
30%
8mph
SE
30% Chance of Flurries
Humidity
84%
Feels like
25°F
Dew Point
28°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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