Rancho Cucamonga, CA Weather


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The most pleasant months of the year for Rancho Cucamonga are May, April and October. In Rancho Cucamonga, there are 5 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Rancho Cucamonga with an average high temperature of 94.2°, which ranks it as warmer than most places in California. Any measurable snowfall is a rare occurance in Rancho Cucamonga. There are few days during the summer when the humidity becomes unpleasant.

Today's Weather - Rancho Cucamonga, CA

4 AM PST

Partly Cloudy

63°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightPartly Cloudy61° / 89° 0 mph
Friday NightPartly Cloudy60° / 84°W 0 to 10 mph
Saturday NightMostly Clear56° / 80°W 0 to 10 mph
Sunday NightMostly Clear then Patchy Fog56° / 79°W 0 to 10 mph
Monday NightMostly Clear then Patchy Fog56° / 78°W 0 to 5 mph
Tuesday NightPatchy Fog54° / 75°SW 0 to 5 mph
Wednesday NightPatchy Fog54° / 72°SW 0 to 10 mph

Weather Highlights

Summer High: the July high is around 93 degrees
Winter Low: the January low is 43
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Rancho Cucamonga area is 8.3 (10=best), which means it is more comfortable than most places in California.

8.3 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January67° 43°
February67° 44°
March71° 46°
April76° 49°
May80° 54°
June86° 58°
July93° 63°
August94° 63°
September90° 61°
October82° 54°
November73° 46°
December67° 42°
Hot, Freezing, Rainy, Snowy Days: Rancho Cucamonga
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January0160
February0060
March1060
April2030
May5020
June11010
July21000
August23010
September16010
October7030
November1030
December0150

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

Reviews for Rancho Cucamonga
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I lived in rancho for a few years and I felt safe the city was clean every thing was at your finger tips Walmart target lots of fast foods  More

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Full of Republicans I hate the city I’m moving to Palm Springs the people here are ridiculous caring Trump flags making fun of me in the city a bunch of Lunitics.  More

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Over 11 years ago

Of all the homes or places of where I lived throughout my lifetime, I especially remember Rancho Cucamunga, CA. But this city's name when I was there was Alta Loma, and  More

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