Hourly Weather Forecast - Diamond Bar, CA

12 AM
56°F
0%
4mph
ENE
Mostly Clear
Humidity
74%
Feels like
56°F
Dew Point
48°F
1 AM
56°F
0%
5mph
ENE
Clear
Humidity
75%
Feels like
56°F
Dew Point
48°F
2 AM
55°F
0%
5mph
ENE
Clear
Humidity
76%
Feels like
55°F
Dew Point
48°F
3 AM
54°F
0%
5mph
ENE
Clear
Humidity
77%
Feels like
54°F
Dew Point
47°F
4 AM
54°F
0%
4mph
ENE
Clear
Humidity
77%
Feels like
54°F
Dew Point
47°F
5 AM
53°F
0%
4mph
ENE
Clear
Humidity
76%
Feels like
53°F
Dew Point
46°F
6 AM
54°F
0%
4mph
ENE
Clear
Humidity
74%
Feels like
54°F
Dew Point
46°F
6:51 AM
7 AM
57°F
0%
4mph
ENE
Sunny
Humidity
67%
Feels like
57°F
Dew Point
46°F
8 AM
61°F
0%
4mph
ENE
Sunny
Humidity
60%
Feels like
61°F
Dew Point
47°F
9 AM
66°F
0%
4mph
E
Sunny
Humidity
52%
Feels like
66°F
Dew Point
48°F
10 AM
70°F
0%
3mph
ESE
Sunny
Humidity
46%
Feels like
70°F
Dew Point
49°F
11 AM
74°F
0%
4mph
SSE
Sunny
Humidity
41%
Feels like
74°F
Dew Point
49°F
12 PM
76°F
0%
4mph
SW
Sunny
Humidity
39%
Feels like
76°F
Dew Point
49°F
1 PM
77°F
0%
5mph
SW
Sunny
Humidity
38%
Feels like
77°F
Dew Point
49°F
2 PM
76°F
0%
6mph
SW
Sunny
Humidity
40%
Feels like
76°F
Dew Point
50°F
3 PM
73°F
0%
6mph
SW
Sunny
Humidity
45%
Feels like
73°F
Dew Point
50°F
4 PM
69°F
0%
5mph
SW
Sunny
Humidity
52%
Feels like
69°F
Dew Point
51°F
4:45 PM
5 PM
66°F
0%
4mph
WSW
Clear
Humidity
60%
Feels like
66°F
Dew Point
51°F
6 PM
62°F
0%
4mph
WSW
Clear
Humidity
68%
Feels like
62°F
Dew Point
52°F
7 PM
60°F
0%
3mph
WSW
Clear
Humidity
73%
Feels like
60°F
Dew Point
51°F
8 PM
58°F
0%
3mph
SSW
Clear
Humidity
77%
Feels like
58°F
Dew Point
51°F
9 PM
56°F
0%
3mph
E
Clear
Humidity
79%
Feels like
56°F
Dew Point
50°F
10 PM
55°F
0%
4mph
E
Clear
Humidity
80%
Feels like
55°F
Dew Point
49°F
11 PM
54°F
0%
4mph
E
Clear
Humidity
81%
Feels like
54°F
Dew Point
49°F

Rainfall and Snowfall Totals Through Wednesday

Heavy Rain, Snow, and Winds Wallop Northwest

The atmospheric river this week continues to hit the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Wednesday's Weather Outlook

How to Measure Snow via NWS

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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