Weather in Rancho Cucamonga, CA
Updated 2026-09-26 07:00 local time · ZIP codes 91701, 91730, 91737, 91739
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
75°10% rain
74°9% rain
77°3% rain80°3% rain
83°1% rain87°1% rain89°9% rain90°1% rain90°1% rain90°1% rain88°4% rain85°9% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Today vs yesterday in Rancho Cucamonga
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 10%).
It feels like 75°F with winds near 2 mph.
77°F, 3% rain chance and 2 mph wind.
Visibility is around 6 mi; gusts may reach 22 mph.
Current temperature is 75°F, wind 2 mph, rain chance up to 10%.
UV index is 0.
Local weather characteristics in Rancho Cucamonga
California weather varies from cool marine conditions along parts of the Pacific coast to hot inland valleys, deserts and snowy mountain climates. Short distances can produce large temperature differences.
Rancho Cucamonga is part of the West weather region. The forecast point is near 34.11°N latitude and 117.59°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Rancho Cucamonga weather today
Overcast and 75°F in Rancho Cucamonga, CA. Today's high is 90°F with a 5% rain chance. Winds are around 2 mph with gusts near 7 mph. Relative humidity is 44%, pressure is 29.86 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Rancho Cucamonga
Sunrise is at 06:41 AM and sunset is at 06:42 PM. Tomorrow's forecast calls for Overcast with a high near 86°F and a low near 73°F. The maximum rain chance is 6%.