Weather in Diamond Bar, CA
Updated 2026-08-11 11:15 local time · ZIP codes 91765
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
82°1% rain96°1% rain98°0% rain98°1% rain97°1% rain96°1% rain92°1% rain88°1% rain82°2% rain
77°4% rain73°8% rain76°3% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 8%).
It feels like 81°F with winds near 6 mph.
77°F, 4% rain chance and 8 mph wind.
Visibility is around 10 mi; gusts may reach 14 mph.
Current temperature is 82°F, wind 6 mph, rain chance up to 8%.
UV index is 7. Sunscreen, shade and protective clothing are recommended.
Diamond Bar weather today
Sunny and 82°F in Diamond Bar, CA. Today's high is 98°F with a 2% rain chance. Winds are around 6 mph with gusts near 7 mph. Relative humidity is 54%, pressure is 30.04 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Diamond Bar
Sunrise is at 06:10 AM and sunset is at 07:42 PM. Tomorrow's forecast calls for Sunny with a high near 83°F and a low near 72°F. The maximum rain chance is 3%.