Hourly Weather Forecast - Diamond Bar, CA

8 AM
65°F
0%
6mph
E
Sunny
Humidity
32%
Feels like
65°F
Dew Point
34°F
9 AM
70°F
0%
6mph
E
Sunny
Humidity
28%
Feels like
70°F
Dew Point
35°F
10 AM
74°F
0%
5mph
E
Sunny
Humidity
24%
Feels like
74°F
Dew Point
35°F
11 AM
79°F
0%
4mph
E
Sunny
Humidity
21%
Feels like
79°F
Dew Point
36°F
12 PM
82°F
0%
4mph
NNW
Sunny
Humidity
20%
Feels like
80°F
Dew Point
37°F
1 PM
83°F
0%
4mph
WNW
Sunny
Humidity
20%
Feels like
80°F
Dew Point
37°F
2 PM
82°F
0%
4mph
WNW
Sunny
Humidity
21%
Feels like
80°F
Dew Point
38°F
3 PM
79°F
0%
4mph
WNW
Sunny
Humidity
23%
Feels like
79°F
Dew Point
38°F
4 PM
75°F
0%
4mph
WNW
Sunny
Humidity
27%
Feels like
75°F
Dew Point
39°F
4:42 PM
5 PM
71°F
0%
4mph
WSW
Clear
Humidity
31%
Feels like
71°F
Dew Point
40°F
6 PM
68°F
0%
4mph
S
Clear
Humidity
35%
Feels like
68°F
Dew Point
40°F
7 PM
66°F
0%
4mph
SE
Clear
Humidity
38%
Feels like
66°F
Dew Point
40°F
8 PM
64°F
0%
4mph
SE
Clear
Humidity
40%
Feels like
64°F
Dew Point
40°F
9 PM
62°F
0%
4mph
ESE
Clear
Humidity
42%
Feels like
62°F
Dew Point
39°F
10 PM
61°F
0%
5mph
E
Clear
Humidity
43%
Feels like
61°F
Dew Point
38°F
11 PM
60°F
0%
5mph
E
Clear
Humidity
43%
Feels like
60°F
Dew Point
38°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide