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

Highlights

On average, there are 286 sunny days per year in Arroyo Grande. Nipomo averages 289 sunny days per year. The US average is 205 sunny days.

Arroyo Grande, California gets 19.5 inches of rain, on average, per year. Nipomo, California gets 16.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

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

Weather Highlights

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

Nipomo, California
Summer High: the July high is around 76.7 degrees
Winter Low: the January low is 39.2
Rain: averages 16.9 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Nipomo is 8.8 (10=best), which means it is more comfortable than most places in California.

Today's Weather - Nipomo, CA

67°F

Today's Weather - Arroyo Grande, CA

67°F

Average Monthly High / Low (°F)

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

August is the hottest month for Nipomo with an average high temperature of 78.1°, which ranks it as cooler than most places in California. In Nipomo, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Nipomo are September, August and July.

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.

December has the coldest nighttime temperatures for Nipomo with an average of 38.2°. This is about average compared to other places in California.

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

In Nipomo, there are 10.6 days annually when the high temperature is over 90°, which is cooler 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 Nipomo, there are 12.8 days annually when the nighttime low temperature falls below freezing, which is about average compared to other 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 Nipomo, 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 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.

January is the wettest month in Nipomo with 3.5 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 16.9 inches in Nipomo means that it 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 rainiest month in Nipomo with 8.7 days of rain, and July is the driest month with only 0.3 rainy days. There are 48.5 rainy days annually in Nipomo, 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 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.

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

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

Any measurable snowfall is a rare occurance in Nipomo.

Any measurable snowfall is a rare occurance in Arroyo Grande.