Hourly Weather Forecast - Diamond Bar, CA

3 AM
57°F
0%
6mph
E
Clear
Humidity
44%
Feels like
57°F
Dew Point
35°F
4 AM
56°F
0%
6mph
E
Clear
Humidity
44%
Feels like
56°F
Dew Point
35°F
5 AM
56°F
0%
6mph
E
Clear
Humidity
45%
Feels like
56°F
Dew Point
35°F
6 AM
57°F
0%
6mph
E
Clear
Humidity
43%
Feels like
57°F
Dew Point
35°F
6:44 AM
7 AM
60°F
0%
7mph
E
Sunny
Humidity
40%
Feels like
60°F
Dew Point
35°F
8 AM
64°F
0%
7mph
E
Sunny
Humidity
34%
Feels like
64°F
Dew Point
35°F
9 AM
69°F
0%
6mph
E
Sunny
Humidity
29%
Feels like
69°F
Dew Point
35°F
10 AM
74°F
0%
5mph
E
Sunny
Humidity
25%
Feels like
74°F
Dew Point
36°F
11 AM
78°F
0%
5mph
E
Sunny
Humidity
22%
Feels like
78°F
Dew Point
36°F
12 PM
80°F
0%
4mph
NNE
Sunny
Humidity
20%
Feels like
79°F
Dew Point
36°F
1 PM
81°F
0%
4mph
WNW
Sunny
Humidity
20%
Feels like
79°F
Dew Point
36°F
2 PM
81°F
0%
4mph
WNW
Sunny
Humidity
21%
Feels like
79°F
Dew Point
37°F
3 PM
78°F
0%
4mph
WNW
Sunny
Humidity
23%
Feels like
78°F
Dew Point
38°F
4 PM
75°F
0%
3mph
WNW
Sunny
Humidity
27%
Feels like
75°F
Dew Point
39°F
4:42 PM
5 PM
71°F
0%
4mph
N
Clear
Humidity
31%
Feels like
71°F
Dew Point
39°F
6 PM
68°F
0%
4mph
ENE
Clear
Humidity
34%
Feels like
68°F
Dew Point
39°F
7 PM
65°F
0%
4mph
ENE
Clear
Humidity
36%
Feels like
65°F
Dew Point
38°F
8 PM
63°F
0%
5mph
ENE
Clear
Humidity
37%
Feels like
63°F
Dew Point
37°F
9 PM
62°F
0%
5mph
E
Clear
Humidity
37%
Feels like
62°F
Dew Point
35°F
10 PM
60°F
0%
6mph
E
Clear
Humidity
37%
Feels like
60°F
Dew Point
34°F
11 PM
59°F
0%
6mph
E
Clear
Humidity
37%
Feels like
59°F
Dew Point
33°F

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Low pressure will produce a swath of snow from Minnesota to Maine into Thursday.

Rainfall Forecast for Northwest through Thursday

Heavy, Flooding Rain Impacts 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

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Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide