Hourly Weather Forecast - Diamond Bar, CA

12 AM
52°F
0%
5mph
E
Partly Cloudy
Humidity
87%
Feels like
52°F
Dew Point
49°F
1 AM
52°F
0%
5mph
E
Mostly Clear
Humidity
88%
Feels like
52°F
Dew Point
49°F
2 AM
52°F
0%
5mph
E
Mostly Clear
Humidity
87%
Feels like
52°F
Dew Point
48°F
3 AM
52°F
0%
5mph
E
Mostly Clear
Humidity
87%
Feels like
52°F
Dew Point
48°F
4 AM
51°F
0%
5mph
E
Mostly Clear
Humidity
88%
Feels like
51°F
Dew Point
48°F
5 AM
52°F
0%
5mph
E
Mostly Clear
Humidity
87%
Feels like
52°F
Dew Point
48°F
6 AM
53°F
0%
6mph
E
Clear
Humidity
82%
Feels like
53°F
Dew Point
47°F
6:51 AM
7 AM
56°F
0%
6mph
E
Sunny
Humidity
76%
Feels like
56°F
Dew Point
48°F
8 AM
61°F
0%
6mph
E
Sunny
Humidity
66%
Feels like
61°F
Dew Point
49°F
9 AM
66°F
0%
5mph
ENE
Sunny
Humidity
57%
Feels like
66°F
Dew Point
50°F
10 AM
71°F
0%
4mph
ENE
Sunny
Humidity
50%
Feels like
71°F
Dew Point
51°F
11 AM
75°F
0%
4mph
ENE
Sunny
Humidity
44%
Feels like
75°F
Dew Point
51°F
12 PM
78°F
0%
3mph
NE
Sunny
Humidity
40%
Feels like
78°F
Dew Point
51°F
1 PM
79°F
0%
3mph
WNW
Mostly Sunny
Humidity
38%
Feels like
79°F
Dew Point
51°F
2 PM
79°F
0%
4mph
W
Mostly Sunny
Humidity
39%
Feels like
79°F
Dew Point
52°F
3 PM
76°F
0%
4mph
W
Mostly Sunny
Humidity
43%
Feels like
76°F
Dew Point
52°F
4 PM
73°F
0%
4mph
W
Mostly Sunny
Humidity
50%
Feels like
73°F
Dew Point
53°F
4:44 PM
5 PM
69°F
0%
3mph
WNW
Mostly Clear
Humidity
57%
Feels like
69°F
Dew Point
53°F
6 PM
65°F
0%
3mph
NNW
Mostly Clear
Humidity
62%
Feels like
65°F
Dew Point
52°F
7 PM
63°F
0%
3mph
N
Mostly Clear
Humidity
66%
Feels like
63°F
Dew Point
51°F
8 PM
61°F
0%
3mph
NE
Mostly Clear
Humidity
69%
Feels like
61°F
Dew Point
51°F
9 PM
59°F
0%
4mph
ENE
Mostly Clear
Humidity
71%
Feels like
59°F
Dew Point
50°F
10 PM
58°F
0%
4mph
ENE
Mostly Clear
Humidity
73%
Feels like
58°F
Dew Point
50°F
11 PM
57°F
0%
4mph
ENE
Mostly Clear
Humidity
74%
Feels like
57°F
Dew Point
49°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's Weather Outlook

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How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

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

Cold Air Damming - Cause And Effects

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