Hourly Weather Forecast - Thornton, Ontario, CA

12 AM
22°F
0%
6mph
WSW
Partly Cloudy
Humidity
79%
Feels like
15°F
Dew Point
16°F
1 AM
22°F
0%
5mph
SW
Partly Cloudy
Humidity
81%
Feels like
15°F
Dew Point
17°F
2 AM
22°F
0%
6mph
SW
Partly Cloudy
Humidity
81%
Feels like
14°F
Dew Point
17°F
3 AM
21°F
10%
6mph
SW
Partly Cloudy
Humidity
80%
Feels like
13°F
Dew Point
16°F
4 AM
21°F
0%
7mph
SW
Partly Cloudy
Humidity
79%
Feels like
12°F
Dew Point
15°F
5 AM
20°F
0%
7mph
SW
Partly Cloudy
Humidity
79%
Feels like
12°F
Dew Point
15°F
6 AM
21°F
10%
7mph
SW
Mostly Clear
Humidity
78%
Feels like
12°F
Dew Point
15°F
7 AM
21°F
0%
7mph
SW
Mostly Clear
Humidity
80%
Feels like
13°F
Dew Point
16°F
7:51 AM
8 AM
22°F
10%
7mph
SW
Mostly Sunny
Humidity
79%
Feels like
14°F
Dew Point
17°F
9 AM
24°F
10%
8mph
SW
Mostly Sunny
Humidity
76%
Feels like
16°F
Dew Point
18°F
10 AM
27°F
0%
8mph
SW
Partly Cloudy
Humidity
73%
Feels like
18°F
Dew Point
19°F
11 AM
29°F
0%
9mph
SW
Partly Cloudy
Humidity
69%
Feels like
20°F
Dew Point
20°F
12 PM
30°F
10%
9mph
WSW
Partly Cloudy
Humidity
66%
Feels like
22°F
Dew Point
20°F
1 PM
31°F
10%
10mph
WSW
Partly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
21°F
2 PM
31°F
10%
9mph
WSW
Partly Cloudy
Humidity
66%
Feels like
23°F
Dew Point
21°F
3 PM
31°F
20%
8mph
WSW
Mostly Cloudy
Humidity
70%
Feels like
23°F
Dew Point
22°F
4 PM
30°F
30%
7mph
WSW
30% Chance of Flurries
Humidity
72%
Feels like
24°F
Dew Point
22°F
4:43 PM
5 PM
30°F
40%
6mph
SW
40% Chance of Flurries
Humidity
76%
Feels like
24°F
Dew Point
24°F
6 PM
30°F
50%
5mph
SW
50% Chance of Flurries
Humidity
78%
Feels like
24°F
Dew Point
24°F
7 PM
29°F
60%
5mph
SSW
60% Chance of Snow
Humidity
79%
Feels like
24°F
Dew Point
24°F
8 PM
30°F
70%
5mph
S
70% Chance of Heavy Snow
Humidity
81%
Feels like
24°F
Dew Point
25°F
9 PM
30°F
80%
5mph
S
80% Chance of Heavy Snow
Humidity
84%
Feels like
24°F
Dew Point
26°F
10 PM
30°F
70%
6mph
S
70% Chance of Heavy Snow
Humidity
86%
Feels like
24°F
Dew Point
27°F
11 PM
30°F
70%
6mph
S
70% Chance of Flurries
Humidity
89%
Feels like
24°F
Dew Point
27°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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