2025 Compare Climate & Weather:
Superior, CO vs Napa, CA

Highlights

On average, there are 260 sunny days per year in Napa. Superior averages 242 sunny days per year. The US average is 205 sunny days.

Napa, California gets 27.3 inches of rain, on average, per year. Superior, Colorado gets 17.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Napa averages 0 inches of snow per year. Superior averages 69.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Napa, California
Summer High: the July high is around 82.4 degrees
Winter Low: the January low is 37.7
Rain: averages 27.3 inches of rain a year
Snow: averages 0 inches of snow a year

Superior, Colorado
Summer High: the July high is around 89.2 degrees
Winter Low: the January low is 19.2
Rain: averages 17.7 inches of rain a year
Snow: averages 69.9 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Napa is 8.4 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Superior is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

Today's Weather - Superior, CO

71°F

Today's Weather - Napa, CA

71°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Superior / Napa

July is the hottest month for Superior with an average high temperature of 89.2°, which ranks it as warmer than most places in Colorado. In Superior, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Superior are September, June and May.

August is the hottest month for Napa with an average high temperature of 83.0°, which ranks it as cooler than most places in California. In Napa, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Napa are October, May and June.

December has the coldest nighttime temperatures for Superior with an average of 18.5°. This is one of the warmest places in Colorado.

December has the coldest nighttime temperatures for Napa with an average of 37.4°. This is about average compared to other places in California.

In Superior, there are 37.5 days annually when the high temperature is over 90°, which is hotter than most places in Colorado.

In Napa, there are 24.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Superior, there are 148.9 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Colorado.

In Napa, there are 21.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Superior, there are 5.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

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

May is the wettest month in Superior with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 17.7 inches in Superior means that it is wetter than most places in Colorado.


February is the wettest month in Napa with 5.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 27.3 inches in Napa means that it is wetter than most places in California.

May is the rainiest month in Superior with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 87.5 rainy days annually in Superior, which is rainier than most places in Colorado. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 17% chance of a rainy day.

December is the rainiest month in Napa with 12.0 days of rain, and July is the driest month with only 0.1 rainy days. There are 68.6 rainy days annually in Napa, which is rainier than most places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 2% chance of a rainy day.

An annual snowfall of 69.9 inches in Superior means that it is snowier than most places in Colorado.

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

March is the snowiest month in Superior with 13.6 inches of snow, and 9 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Napa.