2025 Compare Climate & Weather:
Costa Mesa, CA vs Santa Ana, CA

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Highlights

On average, there are 279 sunny days per year in Santa Ana. Costa Mesa averages 274 sunny days per year. The US average is 205 sunny days.

Santa Ana, California gets 13 inches of rain, on average, per year. Costa Mesa, California gets 12 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Santa Ana averages 0 inches of snow per year. Costa Mesa averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Santa Ana, California
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 46.8
Rain: averages 13 inches of rain a year
Snow: averages 0 inches of snow a year

Costa Mesa, California
Summer High: the July high is around 77.7 degrees
Winter Low: the January low is 47.8
Rain: averages 12 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index
Santa Ana

The annual BestPlaces Comfort Index for Santa Ana is 9.3 (10=best), which means it is one of the most pleasant places in California.

9.3 / 10
June, July and May are the most pleasant months in Santa Ana, while December and January are the least comfortable months.

Costa Mesa

The annual BestPlaces Comfort Index for Costa Mesa is 9.3 (10=best), which means it is one of the most pleasant places in California.

9.3 / 10
June, October and September are the most pleasant months in Costa Mesa, while January and February are the least comfortable months.

Today's Weather - Costa Mesa, CA

4 PM PST

Sunny

84°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonSunny86° / 61°W 10 mph
SundayPatchy Fog then Mostly Sunny79° / 60°S 0 to 10 mph
MondayPatchy Fog then Partly Sunny69° / 57°SW 5 to 15 mph
TuesdayMostly Sunny66° / 54°SW 5 to 15 mph
WednesdaySunny69° / 55°S 5 to 10 mph
ThursdayMostly Sunny69° / 55°S 0 to 10 mph
FridayMostly Sunny68° / 55°S 0 to 10 mph
Today's Weather - Santa Ana, CA

4 PM PST

Sunny

91°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonSunny92° / 64°W 10 mph
SundayPatchy Fog then Mostly Sunny85° / 60°S 0 to 10 mph
MondayPatchy Fog then Partly Sunny72° / 57°S 5 to 15 mph
TuesdayMostly Sunny68° / 54°SW 5 to 10 mph
WednesdaySunny72° / 55°S 0 to 10 mph
ThursdaySunny71° / 56°S 0 to 10 mph
FridayMostly Sunny71° / 56°S 0 to 10 mph
Average Monthly High / Low (°F)
MonthCosta Mesa, CASanta Ana, CA
January67° / 48°69° / 47°
February67° / 49°69° / 48°
March67° / 51°70° / 50°
April69° / 54°73° / 53°
May71° / 58°75° / 58°
June74° / 61°77° / 61°
July78° / 65°82° / 64°
August79° / 65°84° / 65°
September79° / 63°83° / 63°
October75° / 59°78° / 58°
November71° / 52°74° / 51°
December66° / 47°68° / 46°
Hot, Freezing, Rainy, Snowy Days: Costa Mesa / Santa Ana
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 00 / 06 / 60 / 0
February0 / 00 / 07 / 70 / 0
March0 / 00 / 06 / 60 / 0
April1 / 10 / 03 / 30 / 0
May0 / 10 / 01 / 10 / 0
June1 / 10 / 01 / 10 / 0
July2 / 30 / 00 / 00 / 0
August2 / 40 / 00 / 00 / 0
September3 / 50 / 01 / 10 / 0
October2 / 30 / 02 / 20 / 0
November0 / 10 / 04 / 40 / 0
December0 / 00 / 05 / 50 / 0
August is the hottest month for Costa Mesa with an average high temperature of 79.4°, which ranks it as cooler than most places in California. In Costa Mesa, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Costa Mesa are July, September and August.

August is the hottest month for Santa Ana with an average high temperature of 83.7°, which ranks it as cooler than most places in California. In Santa Ana, there are 9 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Santa Ana are October, June and May.
December has the coldest nighttime temperatures for Costa Mesa with an average of 47.1°. This is one of the warmest places in California.

December has the coldest nighttime temperatures for Santa Ana with an average of 46.0°. This is one of the warmest places in California.

In Costa Mesa, there are 10.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Santa Ana, there are 18.1 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Costa Mesa, there are 0.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In Santa Ana, there are 0.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In Costa Mesa, 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 Santa Ana, 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 Costa Mesa with 2.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 12.0 inches in Costa Mesa means that it is drier than most places in California.


February is the wettest month in Santa Ana with 3.1 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 13.0 inches in Santa Ana means that it is drier than most places in California.

February is the rainiest month in Costa Mesa with 6.6 days of rain, and July is the driest month with only 0.4 rainy days. There are 36.4 rainy days annually in Costa Mesa, which is less rainy 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 4% chance of a rainy day.

February is the rainiest month in Santa Ana with 6.5 days of rain, and July is the driest month with only 0.4 rainy days. There are 36.2 rainy days annually in Santa Ana, which is less rainy 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 4% chance of a rainy day.

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

There is rarely any recorded snowfall in Santa Ana, ranking it as one of the least snowy places in California.
Any measurable snowfall is a rare occurance in Costa Mesa.

Any measurable snowfall is a rare occurance in Santa Ana.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Costa Mesa    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Costa Mesa

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Reviews for Santa Ana    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Santa Ana

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Zips In Costa Mesa, California
92627, 92626
Zips In SANTA ANA, CALIFORNIA
92704, 92703, 92707, 92701, 92705, 92706
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