2025 Compare Climate & Weather:
Union City, CA vs Carson City, NV

Highlights

On average, there are 253 sunny days per year in Carson City. Union City averages 265 sunny days per year. The US average is 205 sunny days.

Carson City, Nevada gets 8.8 inches of rain, on average, per year. Union City, California gets 16.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Carson City averages 17 inches of snow per year. Union City averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Carson City, Nevada
Summer High: the July high is around 90.9 degrees
Winter Low: the January low is 20.2
Rain: averages 8.8 inches of rain a year
Snow: averages 17 inches of snow a year

Union City, California
Summer High: the July high is around 76.1 degrees
Winter Low: the January low is 42.3
Rain: averages 16.6 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Carson City is 7.5 (10=best), which means it is more comfortable than most places in Nevada.

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

Today's Weather - Union City, CA

54°F

Today's Weather - Carson City, NV

51°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Union City / Carson City

August is the hottest month for Union City with an average high temperature of 77.3°, which ranks it as cooler than most places in California. In Union City, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union City are August, September and July.

July is the hottest month for Carson City with an average high temperature of 90.9°, which ranks it as about average compared to other places in Nevada. In Carson City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Carson City are September, June and May.

January has the coldest nighttime temperatures for Union City with an average of 42.3°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Carson City with an average of 20.2°. This is about average compared to other places in Nevada.

In Union City, there are 7.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Carson City, there are 45.7 days annually when the high temperature is over 90°, which is about average compared to other places in Nevada.

In Union City, there are 1.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Carson City, there are 160.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Nevada.

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

In Carson City, there are 2.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Nevada.

February is the wettest month in Union City with 3.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 16.6 inches in Union City means that it is about average compared to other places in California.


January is the wettest month in Carson City with 1.4 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 45% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 8.8 inches in Carson City means that it is about average compared to other places in Nevada.

December is the rainiest month in Union City with 11.4 days of rain, and July is the driest month with only 0.1 rainy days. There are 64.1 rainy days annually in Union City, which is rainier than most places in California. The rainiest season is Spring when it rains 51% of the time and the driest is Autumn with only a 2% chance of a rainy day.

January is the rainiest month in Carson City with 6.0 days of rain, and July is the driest month with only 1.4 rainy days. There are 42.9 rainy days annually in Carson City, which is about average compared to other places in Nevada. The rainiest season is Spring when it rains 39% of the time and the driest is Autumn with only a 13% chance of a rainy day.

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

An annual snowfall of 17.0 inches in Carson City means that it is about average compared to other places in Nevada.

Any measurable snowfall is a rare occurance in Union City.

December is the snowiest month in Carson City with 5.3 inches of snow, and 6 months of the year have significant snowfall.