Weather in Walnut, CA
Updated 2026-08-11 09:00 local time · ZIP codes 91789
Partly cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
73°3% rain
83°1% rain92°1% rain96°1% rain98°0% rain98°1% rain97°1% rain96°1% rain92°1% rain88°1% rain82°2% rain
77°4% 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 4%).
It feels like 77°F with winds near 3 mph.
73°F, 3% rain chance and 3 mph wind.
Visibility is around 10 mi; gusts may reach 14 mph.
Current temperature is 73°F, wind 3 mph, rain chance up to 4%.
UV index is 3.
Walnut weather today
Partly cloudy and 73°F in Walnut, CA. Today's high is 98°F with a 2% rain chance. Winds are around 3 mph with gusts near 4 mph. Relative humidity is 69%, pressure is 30.01 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Walnut
Sunrise is at 06:10 AM and sunset is at 07:43 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%.