Hourly Weather Forecast - Diamond Bar, CA

12 AM
52°F
0%
3mph
ENE
Hazy
Humidity
93%
Feels like
52°F
Dew Point
50°F
1 AM
51°F
0%
3mph
ENE
Hazy
Humidity
94%
Feels like
51°F
Dew Point
50°F
2 AM
51°F
0%
3mph
ENE
Hazy
Humidity
95%
Feels like
51°F
Dew Point
49°F
3 AM
50°F
0%
3mph
ENE
Hazy
Humidity
97%
Feels like
50°F
Dew Point
49°F
4 AM
49°F
0%
3mph
ENE
Foggy
Humidity
99%
Feels like
49°F
Dew Point
49°F
5 AM
49°F
0%
3mph
ENE
Foggy
Humidity
100%
Feels like
49°F
Dew Point
49°F
6 AM
50°F
0%
4mph
ENE
Hazy
Humidity
95%
Feels like
50°F
Dew Point
49°F
6:52 AM
7 AM
53°F
0%
4mph
ENE
Mostly Sunny
Humidity
88%
Feels like
53°F
Dew Point
50°F
8 AM
58°F
0%
3mph
E
Mostly Sunny
Humidity
78%
Feels like
58°F
Dew Point
51°F
9 AM
62°F
0%
3mph
SE
Mostly Sunny
Humidity
67%
Feels like
62°F
Dew Point
51°F
10 AM
66°F
0%
4mph
S
Mostly Sunny
Humidity
60%
Feels like
66°F
Dew Point
51°F
11 AM
69°F
0%
4mph
SSW
Mostly Sunny
Humidity
53%
Feels like
69°F
Dew Point
51°F
12 PM
71°F
0%
5mph
SW
Mostly Sunny
Humidity
52%
Feels like
71°F
Dew Point
52°F
1 PM
71°F
0%
6mph
WSW
Mostly Sunny
Humidity
52%
Feels like
71°F
Dew Point
53°F
2 PM
71°F
0%
6mph
WSW
Mostly Sunny
Humidity
53%
Feels like
71°F
Dew Point
53°F
3 PM
69°F
0%
6mph
WSW
Mostly Sunny
Humidity
58%
Feels like
69°F
Dew Point
53°F
4 PM
66°F
0%
5mph
WSW
Mostly Sunny
Humidity
65%
Feels like
66°F
Dew Point
54°F
4:46 PM
5 PM
63°F
0%
5mph
WSW
Mostly Clear
Humidity
72%
Feels like
63°F
Dew Point
53°F
6 PM
60°F
0%
4mph
WSW
Clear
Humidity
77%
Feels like
60°F
Dew Point
53°F
7 PM
58°F
0%
4mph
WSW
Mostly Clear
Humidity
80%
Feels like
58°F
Dew Point
52°F
8 PM
57°F
0%
4mph
WSW
Mostly Clear
Humidity
83%
Feels like
57°F
Dew Point
52°F
9 PM
56°F
0%
3mph
ESE
Partly Cloudy
Humidity
84%
Feels like
56°F
Dew Point
51°F
10 PM
55°F
0%
3mph
E
Partly Cloudy
Humidity
85%
Feels like
55°F
Dew Point
50°F
11 PM
54°F
0%
3mph
E
Partly Cloudy
Humidity
86%
Feels like
54°F
Dew Point
50°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

Today'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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