2025 Compare Climate & Weather:
Hercules, CA vs Louisville, KY

Highlights

On average, there are 195 sunny days per year in Louisville. Hercules averages 265 sunny days per year. The US average is 205 sunny days.

Louisville, Kentucky gets 46.2 inches of rain, on average, per year. Hercules, California gets 23.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Louisville averages 8.7 inches of snow per year. Hercules averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Louisville, Kentucky
Summer High: the July high is around 87.6 degrees
Winter Low: the January low is 25.5
Rain: averages 46.2 inches of rain a year
Snow: averages 8.7 inches of snow a year

Hercules, California
Summer High: the July high is around 77.9 degrees
Winter Low: the January low is 40.2
Rain: averages 23.9 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Louisville-Jefferson County is 7.3 (10=best), which means it is one of the most pleasant places in Kentucky.

The annual BestPlaces Comfort Index for Hercules is 8.5 (10=best), which means it is more comfortable than most places in California.

Today's Weather - Hercules, CA

67°F

Today's Weather - Louisville, KY

83°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Hercules / Louisville

August is the hottest month for Hercules with an average high temperature of 78.2°, which ranks it as cooler than most places in California. In Hercules, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hercules are July, September and August.

July is the hottest month for Louisville-Jefferson County with an average high temperature of 87.6°, which ranks it as warmer than most places in Kentucky. In Louisville-Jefferson County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Louisville-Jefferson County are May, September and June.

January has the coldest nighttime temperatures for Hercules with an average of 40.2°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Louisville-Jefferson County with an average of 25.5°. This is warmer than most places in Kentucky.

In Hercules, there are 17.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Louisville-Jefferson County, there are 29.0 days annually when the high temperature is over 90°, which is about average compared to other places in Kentucky.

In Hercules, there are 9.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Louisville-Jefferson County, there are 82.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Kentucky.

In Hercules, 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 Louisville-Jefferson County, there are 0.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Kentucky.

February is the wettest month in Hercules with 4.6 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 23.9 inches in Hercules means that it is wetter than most places in California.


May is the wettest month in Louisville-Jefferson County with 5.2 inches of rain, and the driest month is September with 3.2 inches. The wettest season is Summer with 29% of yearly precipitation and 22% occurs in Winter, which is the driest season. The annual rainfall of 46.2 inches in Louisville-Jefferson County means that it is drier than most places in Kentucky.

January is the rainiest month in Hercules with 11.2 days of rain, and July is the driest month with only 0.2 rainy days. There are 64.1 rainy days annually in Hercules, 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.

May is the rainiest month in Louisville-Jefferson County with 11.7 days of rain, and September is the driest month with only 7.2 rainy days. There are 115.3 rainy days annually in Louisville-Jefferson County, which is about average compared to other places in Kentucky. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 21% chance of a rainy day.

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

An annual snowfall of 8.7 inches in Louisville-Jefferson County means that it is about average compared to other places in Kentucky.

Any measurable snowfall is a rare occurance in Hercules.

February is the snowiest month in Louisville-Jefferson County with 2.9 inches of snow, and 4 months of the year have significant snowfall.