Hourly Weather Forecast - Diamond Bar, CA

2 AM
42°F
0%
4mph
ENE
Foggy
Humidity
100%
Feels like
39°F
Dew Point
42°F
3 AM
41°F
0%
4mph
ENE
Foggy
Humidity
99%
Feels like
38°F
Dew Point
41°F
4 AM
41°F
0%
4mph
ENE
Foggy
Humidity
99%
Feels like
38°F
Dew Point
40°F
5 AM
40°F
0%
4mph
ENE
Hazy
Humidity
98%
Feels like
38°F
Dew Point
40°F
6 AM
41°F
0%
4mph
E
Hazy
Humidity
94%
Feels like
38°F
Dew Point
39°F
6:55 AM
7 AM
43°F
0%
4mph
E
Sunny
Humidity
89%
Feels like
40°F
Dew Point
40°F
8 AM
46°F
0%
4mph
ENE
Sunny
Humidity
83%
Feels like
44°F
Dew Point
41°F
9 AM
50°F
0%
4mph
ENE
Sunny
Humidity
76%
Feels like
50°F
Dew Point
43°F
10 AM
55°F
0%
4mph
NE
Sunny
Humidity
68%
Feels like
55°F
Dew Point
44°F
11 AM
58°F
0%
4mph
NE
Sunny
Humidity
59%
Feels like
58°F
Dew Point
44°F
12 PM
61°F
0%
4mph
NNE
Sunny
Humidity
53%
Feels like
61°F
Dew Point
44°F
1 PM
62°F
0%
3mph
N
Sunny
Humidity
51%
Feels like
62°F
Dew Point
44°F
2 PM
63°F
0%
4mph
NNW
Sunny
Humidity
50%
Feels like
63°F
Dew Point
44°F
3 PM
62°F
0%
3mph
NW
Sunny
Humidity
53%
Feels like
62°F
Dew Point
45°F
4 PM
60°F
0%
3mph
NW
Sunny
Humidity
56%
Feels like
60°F
Dew Point
44°F
4:50 PM
5 PM
57°F
0%
3mph
N
Clear
Humidity
60%
Feels like
57°F
Dew Point
43°F
6 PM
55°F
0%
4mph
ENE
Clear
Humidity
60%
Feels like
55°F
Dew Point
41°F
7 PM
53°F
0%
5mph
E
Clear
Humidity
60%
Feels like
53°F
Dew Point
39°F
8 PM
51°F
0%
5mph
E
Clear
Humidity
61%
Feels like
51°F
Dew Point
38°F
9 PM
50°F
0%
5mph
E
Mostly Clear
Humidity
60%
Feels like
48°F
Dew Point
37°F
10 PM
49°F
0%
6mph
E
Mostly Clear
Humidity
61%
Feels like
46°F
Dew Point
36°F
11 PM
48°F
0%
6mph
E
Partly Cloudy
Humidity
62%
Feels like
45°F
Dew Point
35°F

Snow Forecast Through Monday

Major Winter Storm Packs Heavy Snow, Significant Icing from Upper Midwest to New England

A major winter storm will deliver plentiful snow and significant icing from the Upper Midwest to New England.

Sunday's Weather Outlook

Sunday's Weather Outlook

Satellite image of Hurricane Melissa

2025 Year in Review: Powerful Hurricanes in the Atlantic

A frame from an automated video of a tornado and its mesocyclone that derailed multiple train cars near Enderlin, North Dakota and destroyed multiple homes on June 20, 2025. (ChrisWx via Wikimedia Commons)

2025 Year in Review: Extreme Weather - January through June

Photos and videos from the Palisades Fire that started in the City of Los Angeles, January 8, 2025. (CAL FIRE_Official via Wikimedia Commons)

2025 Year in Review: Billion Dollar Disasters - The California Wildfires

Hurricane Erick at its peak intensity before making landfall on Guerrero, Mexico on June 19, 2025 (NOAA/Wikimedia Commons)

2025 Year in Review: Active Tropical Season for The Pacific

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide