Diamond Bar Weather

United States, North America

Updated: 04:30 PMVerified DataReal-time

Diamond Bar

United States, United States of America

Saturday, 30 May 2026 at 17:02

29°

Sunny

Feels like 29°C

Humidity

42%

Wind

18.4 km/h WSW

Visibility

10 km

Pressure

1013 mb

Weather Alerts (1)

Wind AdvisoryModerate

* WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Interstate 5 Corridor. * WHEN...From 6 PM this evening to 9 AM PDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Interstate 5 Corridor

Weather Forecast for Diamond Bar

31°/ 11°

Sunny

Updated now

Rain Chance

Humidity

62%

Max Wind

18 km/h

Avg Temp

20°C

Sunrise

05:41 AM

Sunset

07:56 PM

Hourly Breakdown

Morning (6AM - 12PM)

18°C

06:00 am

13°

07:00 am

15°

08:00 am

17°

09:00 am

19°

10:00 am

21°

11:00 am

25°

Afternoon (12PM - 6PM)

29°C

12:00 pm

27°

01:00 pm

29°

02:00 pm

30°

03:00 pm

30°

04:00 pm

29°

05:00 pm

28°

Evening (6PM - 12AM)

21°C

06:00 pm

27°

07:00 pm

24°

08:00 pm

22°

09:00 pm

20°

10:00 pm

18°

11:00 pm

17°

Night (12AM - 6AM)

12°C

12:00 am

13°

01:00 am

12°

02:00 am

12°

03:00 am

12°

04:00 am

12°

05:00 am

11°

Hourly Forecast

Extended Forecast

Today

Sunny

18 km/h

31°11°

Sun, 31 May

Sunny

Other US Locations

View All

New York

15°C

Sunny

H: 16°L: 11°

Los Angeles

25°C

Sunny

H: 28°L: 12°

Chicago

21°C

Sunny

H: 23°L: 14°

Houston

33°C

Partly cloudy

H: 35°L: 23°

Phoenix

32°C

Sunny

H: 36°L: 18°

Philadelphia

18°C

Sunny

H: 20°L: 13°

About Diamond Bar Weather

Diamond Bar is located in the United States with varying weather patterns throughout the year. Plan your visit to Diamond Barwith our accurate weather forecasts, including hourly updates, 7-day predictions, and real-time conditions. Whether you're a local or visitor, stay prepared for whatever weather the United States brings.