2025 Compare Climate & Weather:
Vacaville, CA vs Discovery Bay, CA

Highlights

On average, there are 259 sunny days per year in Discovery Bay. Vacaville averages 260 sunny days per year. The US average is 205 sunny days.

Discovery Bay, California gets 14.5 inches of rain, on average, per year. Vacaville, California gets 25.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Discovery Bay averages 0 inches of snow per year. Vacaville averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Discovery Bay, California
Summer High: the July high is around 92.5 degrees
Winter Low: the January low is 38.7
Rain: averages 14.5 inches of rain a year
Snow: averages 0 inches of snow a year

Vacaville, California
Summer High: the July high is around 93.4 degrees
Winter Low: the January low is 38.7
Rain: averages 25.2 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Vacaville is 8.2 (10=best), which means it is about average compared to other places in California.

Today's Weather - Vacaville, CA

71°F

Today's Weather - Discovery Bay, CA

73°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Vacaville / Discovery Bay

July is the hottest month for Vacaville with an average high temperature of 93.4°, which ranks it as warmer than most places in California. In Vacaville, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Vacaville are October, May and April.

July is the hottest month for Discovery Bay with an average high temperature of 92.5°, which ranks it as about average compared to other places in California. In Discovery Bay, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Discovery Bay are October, May and April.

December has the coldest nighttime temperatures for Vacaville with an average of 38.6°. This is about average compared to other places in California.

January has the coldest nighttime temperatures for Discovery Bay with an average of 38.7°. This is warmer than most places in California.

In Vacaville, there are 77.5 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Discovery Bay, there are 69.1 days annually when the high temperature is over 90°, which is about average compared to other places in California.

In Vacaville, there are 11.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Discovery Bay, there are 12.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

January is the wettest month in Vacaville 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 0% occurs in Autumn, which is the driest season. The annual rainfall of 25.2 inches in Vacaville means that it is wetter than most places in California.


January is the wettest month in Discovery Bay with 2.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 54% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 14.5 inches in Discovery Bay means that it is drier than most places in California.

January is the rainiest month in Vacaville with 12.0 days of rain, and July is the driest month with only 0.0 rainy days. There are 64.5 rainy days annually in Vacaville, which is rainier than most places in California. The rainiest season is Spring when it rains 52% of the time and the driest is Autumn with only a 2% chance of a rainy day.

January is the rainiest month in Discovery Bay with 11.0 days of rain, and July is the driest month with only 0.1 rainy days. There are 56.1 rainy days annually in Discovery Bay, which is about average compared to other places in California. The rainiest season is Spring when it rains 53% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Vacaville.

Any measurable snowfall is a rare occurance in Discovery Bay.