Hourly Weather Forecast - Diamond Bar, CA

12 AM
54°F
0%
3mph
ENE
Partly Cloudy
Humidity
71%
Feels like
54°F
Dew Point
45°F
1 AM
54°F
0%
3mph
ENE
Partly Cloudy
Humidity
73%
Feels like
54°F
Dew Point
45°F
2 AM
53°F
0%
3mph
ENE
Partly Cloudy
Humidity
73%
Feels like
53°F
Dew Point
45°F
3 AM
52°F
0%
4mph
ENE
Partly Cloudy
Humidity
73%
Feels like
52°F
Dew Point
44°F
4 AM
52°F
0%
4mph
ENE
Partly Cloudy
Humidity
72%
Feels like
52°F
Dew Point
43°F
5 AM
51°F
0%
4mph
ENE
Partly Cloudy
Humidity
72%
Feels like
51°F
Dew Point
43°F
6 AM
52°F
0%
4mph
ENE
Partly Cloudy
Humidity
68%
Feels like
52°F
Dew Point
42°F
6:47 AM
7 AM
55°F
0%
4mph
ENE
Partly Cloudy
Humidity
61%
Feels like
55°F
Dew Point
42°F
8 AM
59°F
0%
4mph
E
Partly Cloudy
Humidity
52%
Feels like
59°F
Dew Point
42°F
9 AM
64°F
0%
3mph
SE
Partly Cloudy
Humidity
44%
Feels like
64°F
Dew Point
41°F
10 AM
68°F
0%
3mph
S
Mostly Sunny
Humidity
38%
Feels like
68°F
Dew Point
41°F
11 AM
71°F
0%
4mph
SSW
Mostly Sunny
Humidity
34%
Feels like
71°F
Dew Point
41°F
12 PM
73°F
0%
5mph
SW
Mostly Sunny
Humidity
32%
Feels like
73°F
Dew Point
42°F
1 PM
74°F
0%
5mph
WSW
Mostly Sunny
Humidity
32%
Feels like
74°F
Dew Point
42°F
2 PM
73°F
0%
6mph
WSW
Mostly Sunny
Humidity
35%
Feels like
73°F
Dew Point
44°F
3 PM
71°F
0%
6mph
WSW
Mostly Sunny
Humidity
39%
Feels like
71°F
Dew Point
45°F
4 PM
68°F
0%
6mph
WSW
Partly Cloudy
Humidity
46%
Feels like
68°F
Dew Point
46°F
4:43 PM
5 PM
64°F
0%
5mph
WSW
Partly Cloudy
Humidity
54%
Feels like
64°F
Dew Point
47°F
6 PM
61°F
0%
4mph
WSW
Partly Cloudy
Humidity
62%
Feels like
61°F
Dew Point
48°F
7 PM
58°F
0%
3mph
WSW
Partly Cloudy
Humidity
69%
Feels like
58°F
Dew Point
48°F
8 PM
57°F
0%
3mph
W
Partly Cloudy
Humidity
74%
Feels like
57°F
Dew Point
48°F
9 PM
55°F
0%
3mph
NNW
Cloudy
Humidity
76%
Feels like
55°F
Dew Point
48°F
10 PM
54°F
0%
3mph
N
Cloudy
Humidity
77%
Feels like
54°F
Dew Point
47°F
11 PM
54°F
0%
3mph
NNE
Cloudy
Humidity
77%
Feels like
54°F
Dew Point
47°F

Snow and ice forecast through Thursday A.M.

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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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Outdoor Sports Guide