Zip 91730 (Rancho Cucamonga, CA) Climate

Rancho Cucamonga, CA is located in the warm-summer Mediterranean climate zone and enjoys mild temperatures year-round. Summers are typically hot and dry with temperatures reaching up to the mid-90s, while winter months bring cooler temperatures ranging from the low 40s to high 60s. Rainfall is relatively sparse throughout the year, with an average of only 12 inches of precipitation annually. This climate makes Rancho Cucamonga an ideal place for outdoor activities throughout most of the year.

Rancho Cucamonga (zip 91730), California gets 17 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Rancho Cucamonga (zip 91730) averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 282 sunny days per year in Rancho Cucamonga (zip 91730). The US average is 205 sunny days.

Rancho Cucamonga (zip 91730) gets some kind of precipitation, on average, 30 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 93 degrees
Winter Low: the January low is 43
Rain: averages 17 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 91730 zip code is 8.8 (10=best), which means it is more comfortable than most places in California.

8.4 Summer - 8.6 Winter

May, October and June are the most pleasant months in the 91730 zip code, while August and July are the least comfortable months.

Climate	Rancho Cucamonga, California	United States
	16.7 in.	38.1 in.
	0.0 in.	27.8 in.
	30.3 days	106.2 days
	282 days	205 days
	92.7°	85.8°
	43.1°	21.7°
	8.8	7
	5.7	4.3
	1205 ft.	2443 ft.

Climate

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.

August is the hottest month for the 91730 zip code with an average high temperature of 94.0°, which ranks it as warmer than most places in California. In the 91730 zip code, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 91730 zip code are May, April and October.

In the 91730 zip code, there are 84.7 days annually when the high temperature is over 90°, which is hotter than most places in California.

December has the coldest nighttime temperatures for the 91730 zip code with an average of 42.1°. This is warmer than most places in California.

In the 91730 zip code, there are 2.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In the 91730 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

Humidity in the 91730 zip code is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.

February is the wettest month in the 91730 zip code with 4.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 16.7 inches in the 91730 zip code means that it is about average compared to other places in California.

February is the rainiest month in the 91730 zip code with 5.9 days of rain, and July is the driest month with only 0.2 rainy days. There are 30.3 rainy days annually in the 91730 zip code, which is one of the least rainy places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 3% chance of a rainy day.

There is rarely any recorded snowfall in the 91730 zip code, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in the 91730 zip code.

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