2025 Compare Climate & Weather:
Oceanside, CA vs Charleston, SC

Highlights

On average, there are 209 sunny days per year in Charleston. Oceanside averages 266 sunny days per year. The US average is 205 sunny days.

Charleston, South Carolina gets 48.3 inches of rain, on average, per year. Oceanside, California gets 12.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Charleston averages 0.4 inches of snow per year. Oceanside averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Charleston, South Carolina
Summer High: the July high is around 89.9 degrees
Winter Low: the January low is 39.3
Rain: averages 48.3 inches of rain a year
Snow: averages 0.4 inches of snow a year

Oceanside, California
Summer High: the July high is around 75.9 degrees
Winter Low: the January low is 43
Rain: averages 12.8 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Oceanside is 9.1 (10=best), which means it is one of the most pleasant places in California.

Today's Weather - Oceanside, CA

80°F

Today's Weather - Charleston, SC

74°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Oceanside / Charleston

August is the hottest month for Oceanside with an average high temperature of 77.2°, which ranks it as cooler than most places in California. In Oceanside, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oceanside are August, September and July.

July is the hottest month for Charleston with an average high temperature of 89.9°, which ranks it as cooler than most places in South Carolina. In Charleston, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Charleston are October, May and April.

December has the coldest nighttime temperatures for Oceanside with an average of 42.4°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Charleston with an average of 39.3°. This is one of the warmest places in South Carolina.

In Oceanside, there are 5.2 days annually when the high temperature is over 90°, which is one of the coolest places in California.

In Charleston, there are 41.1 days annually when the high temperature is over 90°, which is cooler than most places in South Carolina.

In Oceanside, there are 3.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Charleston, there are 17.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in South Carolina.

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

February is the wettest month in Oceanside with 2.8 inches of rain, and the driest month is June with 0.1 inches. The wettest season is Spring with 57% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 12.8 inches in Oceanside means that it is drier than most places in California.


August is the wettest month in Charleston with 6.7 inches of rain, and the driest month is May with 2.5 inches. The wettest season is Autumn with 36% of yearly precipitation and 19% occurs in Summer, which is the driest season. The annual rainfall of 48.3 inches in Charleston means that it is wetter than most places in South Carolina.

February is the rainiest month in Oceanside with 6.9 days of rain, and July is the driest month with only 0.4 rainy days. There are 38.1 rainy days annually in Oceanside, 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 4% chance of a rainy day.

August is the rainiest month in Charleston with 11.7 days of rain, and May is the driest month with only 6.8 rainy days. There are 105.9 rainy days annually in Charleston, which is rainier than most places in South Carolina. The rainiest season is Autumn when it rains 32% of the time and the driest is Summer with only a 21% chance of a rainy day.

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

An annual snowfall of 0.4 inches in Charleston means that it is less snowy than most places in South Carolina.

Any measurable snowfall is a rare occurance in Oceanside.

December is the snowiest month in Charleston with 0.2 inches of snow, and no months of the year have significant snowfall.