2025 Compare Climate & Weather:
Arroyo Grande, CA vs Cayucos, CA

Highlights

On average, there are 284 sunny days per year in Cayucos. Arroyo Grande averages 286 sunny days per year. The US average is 205 sunny days.

Cayucos, California gets 19.7 inches of rain, on average, per year. Arroyo Grande, California gets 19.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Cayucos averages 0 inches of snow per year. Arroyo Grande averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Cayucos, California
Summer High: the July high is around 73.3 degrees
Winter Low: the January low is 43.1
Rain: averages 19.7 inches of rain a year
Snow: averages 0 inches of snow a year

Arroyo Grande, California
Summer High: the July high is around 72.7 degrees
Winter Low: the January low is 42.9
Rain: averages 19.5 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Cayucos is 8.9 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Arroyo Grande is 8.7 (10=best), which means it is more comfortable than most places in California.

Today's Weather - Arroyo Grande, CA

59°F

Today's Weather - Cayucos, CA

56°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arroyo Grande / Cayucos

September is the hottest month for Arroyo Grande with an average high temperature of 74.2°, which ranks it as one of the coolest places in California. In Arroyo Grande, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Arroyo Grande are September, August and July.

September is the hottest month for Cayucos with an average high temperature of 75.0°, which ranks it as one of the coolest places in California. In Cayucos, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cayucos are September, August and October.

December has the coldest nighttime temperatures for Arroyo Grande with an average of 42.2°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Cayucos with an average of 42.5°. This is warmer than most places in California.

In Arroyo Grande, there are 5.7 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Cayucos, there are 5.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Arroyo Grande, there are 3.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Cayucos, there are 3.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

February is the wettest month in Arroyo Grande with 4.1 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 19.5 inches in Arroyo Grande means that it is about average compared to other places in California.


February is the wettest month in Cayucos with 4.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 19.7 inches in Cayucos means that it is about average compared to other places in California.

February is the rainiest month in Arroyo Grande with 8.9 days of rain, and July is the driest month with only 0.4 rainy days. There are 49.8 rainy days annually in Arroyo Grande, which is about average compared to other places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% chance of a rainy day.

February is the rainiest month in Cayucos with 9.2 days of rain, and July is the driest month with only 0.4 rainy days. There are 50.3 rainy days annually in Cayucos, which is about average compared to other places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Arroyo Grande.

Any measurable snowfall is a rare occurance in Cayucos.