Hourly Weather Forecast - Thornton, Ontario, CA

12 AM
30°F
20%
6mph
S
Partly Cloudy
Humidity
80%
Feels like
24°F
Dew Point
25°F
1 AM
31°F
30%
5mph
S
30% Chance Freezing Rain
Humidity
79%
Feels like
25°F
Dew Point
25°F
2 AM
31°F
30%
5mph
S
30% Chance Freezing Rain
Humidity
79%
Feels like
26°F
Dew Point
25°F
3 AM
30°F
40%
4mph
S
40% Chance Freezing Rain
Humidity
81%
Feels like
26°F
Dew Point
25°F
4 AM
29°F
30%
3mph
S
30% Chance Frozen Mix
Humidity
84%
Feels like
26°F
Dew Point
25°F
5 AM
29°F
20%
3mph
SSE
Cloudy
Humidity
88%
Feels like
29°F
Dew Point
26°F
6 AM
29°F
10%
2mph
SSE
Cloudy
Humidity
90%
Feels like
29°F
Dew Point
26°F
7 AM
30°F
0%
2mph
SE
Cloudy
Humidity
91%
Feels like
30°F
Dew Point
27°F
7:53 AM
8 AM
31°F
0%
2mph
SE
Cloudy
Humidity
88%
Feels like
31°F
Dew Point
28°F
9 AM
33°F
0%
2mph
SE
Mostly Cloudy
Humidity
85%
Feels like
33°F
Dew Point
29°F
10 AM
34°F
0%
2mph
SE
Mostly Cloudy
Humidity
83%
Feels like
34°F
Dew Point
29°F
11 AM
34°F
0%
2mph
ESE
Mostly Cloudy
Humidity
81%
Feels like
34°F
Dew Point
29°F
12 PM
35°F
0%
3mph
ESE
Mostly Cloudy
Humidity
80%
Feels like
32°F
Dew Point
29°F
1 PM
35°F
0%
4mph
ESE
Cloudy
Humidity
80%
Feels like
31°F
Dew Point
29°F
2 PM
34°F
10%
4mph
ESE
Cloudy
Humidity
81%
Feels like
31°F
Dew Point
29°F
3 PM
34°F
10%
4mph
ESE
Cloudy
Humidity
82%
Feels like
31°F
Dew Point
29°F
4 PM
34°F
10%
4mph
SE
Cloudy
Humidity
83%
Feels like
30°F
Dew Point
29°F
4:44 PM
5 PM
34°F
10%
4mph
SE
Cloudy
Humidity
84%
Feels like
29°F
Dew Point
29°F
6 PM
33°F
10%
5mph
SE
Cloudy
Humidity
85%
Feels like
29°F
Dew Point
29°F
7 PM
33°F
20%
5mph
SE
Cloudy
Humidity
86%
Feels like
28°F
Dew Point
29°F
8 PM
33°F
30%
5mph
SE
30% Chance of Light Rain
Humidity
86%
Feels like
28°F
Dew Point
29°F
9 PM
33°F
30%
6mph
SE
30% Chance of Light Rain
Humidity
85%
Feels like
28°F
Dew Point
29°F
10 PM
33°F
40%
6mph
SE
40% Chance of Light Rain
Humidity
85%
Feels like
28°F
Dew Point
30°F
11 PM
33°F
40%
7mph
SE
40% Chance of Light Rain
Humidity
86%
Feels like
27°F
Dew Point
29°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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Today's Weather Outlook

Today'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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