2025 Compare Climate & Weather:
Sun City, AZ vs Upland, CA

Highlights

On average, there are 289 sunny days per year in Upland. Sun City averages 293 sunny days per year. The US average is 205 sunny days.

Upland, California gets 21 inches of rain, on average, per year. Sun City, Arizona gets 9.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Upland averages 0 inches of snow per year. Sun City averages 0.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Upland, California
Summer High: the July high is around 92.2 degrees
Winter Low: the January low is 42.7
Rain: averages 21 inches of rain a year
Snow: averages 0 inches of snow a year

Sun City, Arizona
Summer High: the July high is around 105.7 degrees
Winter Low: the January low is 43
Rain: averages 9.3 inches of rain a year
Snow: averages 0.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Sun City is 7.2 (10=best), which means it is less comfortable than most places in Arizona.

Today's Weather - Sun City, AZ

69°F

Today's Weather - Upland, CA

61°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sun City / Upland

July is the hottest month for Sun City with an average high temperature of 105.7°, which ranks it as warmer than most places in Arizona. In Sun City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sun City are March, November and April.

August is the hottest month for Upland with an average high temperature of 93.5°, which ranks it as warmer than most places in California. In Upland, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Upland are May, April and October.

December has the coldest nighttime temperatures for Sun City with an average of 41.9°. This is one of the warmest places in Arizona.

December has the coldest nighttime temperatures for Upland with an average of 41.8°. This is warmer than most places in California.

In Sun City, there are 166.7 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

In Upland, there are 81.0 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Sun City, there are 2.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Arizona.

In Upland, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Sun City, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Arizona.

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

February is the wettest month in Sun City with 1.3 inches of rain, and the driest month is May with 0.1 inches. The wettest season is Spring with 37% of yearly precipitation and 15% occurs in Summer, which is the driest season. The annual rainfall of 9.3 inches in Sun City means that it is drier than most places in Arizona.


February is the wettest month in Upland with 5.1 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 21.0 inches in Upland means that it is about average compared to other places in California.

February is the rainiest month in Sun City with 3.9 days of rain, and June is the driest month with only 0.4 rainy days. There are 31.9 rainy days annually in Sun City, which is less rainy than most places in Arizona. The rainiest season is Spring when it rains 36% of the time and the driest is Summer with only a 19% chance of a rainy day.

February is the rainiest month in Upland with 5.9 days of rain, and July is the driest month with only 0.1 rainy days. There are 32.5 rainy days annually in Upland, which is less rainy than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% chance of a rainy day.

An annual snowfall of 0.1 inches in Sun City means that it is less snowy than most places in Arizona.

There is rarely any recorded snowfall in Upland, ranking it as one of the least snowy places in California.

December is the snowiest month in Sun City with 0.0 inches of snow, and no months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Upland.