2025 Compare Climate & Weather:
Alamo, CA vs Vallejo, CA

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Highlights

On average, there are 258 sunny days per year in Vallejo. Alamo averages 262 sunny days per year. The US average is 205 sunny days.

Vallejo, California gets 21.4 inches of rain, on average, per year. Alamo, California gets 23.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Vallejo averages 0 inches of snow per year. Alamo averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Vallejo, California
Summer High: the July high is around 84 degrees
Winter Low: the January low is 37.5
Rain: averages 21.4 inches of rain a year
Snow: averages 0 inches of snow a year

Alamo, California
Summer High: the July high is around 83.3 degrees
Winter Low: the January low is 39.5
Rain: averages 23.2 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

Vallejo

The annual BestPlaces Comfort Index for Vallejo is 8.4 (10=best), which means it is more comfortable than most places in California.

8.4 / 10

September, August and June are the most pleasant months in Vallejo, while January and December are the least comfortable months.

Alamo

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

8.5 / 10

June, September and August are the most pleasant months in Alamo, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Alamo, CA	Vallejo, CA
January	57° / 40°	56° / 38°
February	61° / 42°	61° / 40°
March	65° / 44°	66° / 42°
April	69° / 46°	70° / 44°
May	74° / 50°	76° / 48°
June	79° / 53°	82° / 52°
July	83° / 56°	84° / 53°
August	83° / 56°	84° / 53°
September	81° / 55°	83° / 51°
October	75° / 50°	76° / 47°
November	65° / 44°	64° / 41°
December	57° / 40°	56° / 37°

Hot, Freezing, Rainy, Snowy Days: Alamo / Vallejo

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	4 / 7	11 / 11	0 / 0
February	0 / 0	1 / 3	11 / 11	0 / 0
March	0 / 0	0 / 1	10 / 9	0 / 0
April	0 / 0	0 / 0	6 / 6	0 / 0
May	2 / 2	0 / 0	3 / 4	0 / 0
June	5 / 6	0 / 0	1 / 1	0 / 0
July	8 / 8	0 / 0	0 / 0	0 / 0
August	8 / 7	0 / 0	0 / 0	0 / 0
September	7 / 6	0 / 0	1 / 1	0 / 0
October	1 / 1	0 / 0	4 / 3	0 / 0
November	0 / 0	1 / 3	8 / 8	0 / 0
December	0 / 0	4 / 8	11 / 12	0 / 0

July is the hottest month for Alamo with an average high temperature of 83.3°, which ranks it as cooler than most places in California. In Alamo, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Alamo are June, October and September.

August is the hottest month for Vallejo with an average high temperature of 84.1°, which ranks it as cooler than most places in California. In Vallejo, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Vallejo are May, October and June.

January has the coldest nighttime temperatures for Alamo with an average of 39.5°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Vallejo with an average of 37.2°. This is about average compared to other places in California.

In Alamo, there are 32.2 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Vallejo, there are 29.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Alamo, there are 10.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Vallejo, there are 21.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Alamo, 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 Vallejo, 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 Alamo with 4.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 56% of yearly precipitation and 0% occurs in Autumn, which is the driest season. The annual rainfall of 23.2 inches in Alamo means that it is wetter than most places in California.

January is the wettest month in Vallejo with 4.3 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 21.4 inches in Vallejo means that it is wetter than most places in California.

December is the rainiest month in Alamo with 11.4 days of rain, and July is the driest month with only 0.2 rainy days. There are 66.6 rainy days annually in Alamo, 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.

December is the rainiest month in Vallejo with 11.5 days of rain, and July is the driest month with only 0.1 rainy days. There are 65.0 rainy days annually in Vallejo, which is rainier than most places in California. The rainiest season is Spring when it rains 52% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Alamo.

Any measurable snowfall is a rare occurance in Vallejo.

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 Alamo 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

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Reviews for Vallejo 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 Vallejo

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2025 Compare Climate & Weather:
Alamo, CA vs Vallejo, CA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Alamo / Vallejo

January has the coldest nighttime temperatures for Alamo with an average of 39.5°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Vallejo with an average of 37.2°. This is about average compared to other places in California.

In Alamo, there are 32.2 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Vallejo, there are 29.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Alamo, there are 10.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Vallejo, there are 21.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

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

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

Any measurable snowfall is a rare occurance in Alamo.

Any measurable snowfall is a rare occurance in Vallejo.

DID YOU KNOW?

Reviews for Alamo 2 Reviews

Reviews for Vallejo 2 Reviews

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2025 Compare Climate & Weather:Alamo, CA vs Vallejo, CA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Alamo / Vallejo

January has the coldest nighttime temperatures for Alamo with an average of 39.5°. This is warmer than most places in California.December has the coldest nighttime temperatures for Vallejo with an average of 37.2°. This is about average compared to other places in California.

In Alamo, there are 32.2 days annually when the high temperature is over 90°, which is cooler than most places in California.In Vallejo, there are 29.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Alamo, there are 10.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.In Vallejo, there are 21.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

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

Any measurable snowfall is a rare occurance in Alamo.Any measurable snowfall is a rare occurance in Vallejo.

DID YOU KNOW?

Reviews for Alamo 2 Reviews

Reviews for Vallejo 2 Reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Zips In Alamo, California

Zips In VALLEJO, CALIFORNIA

Learn More About ALAMO, CALIFORNIA

Learn More About Vallejo, California

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BestPlaces Tools

About BestPlaces

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2025 Compare Climate & Weather:
Alamo, CA vs Vallejo, CA

January has the coldest nighttime temperatures for Alamo with an average of 39.5°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Vallejo with an average of 37.2°. This is about average compared to other places in California.

In Alamo, there are 32.2 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Vallejo, there are 29.8 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Alamo, there are 10.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Vallejo, there are 21.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

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

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

Any measurable snowfall is a rare occurance in Alamo.

Any measurable snowfall is a rare occurance in Vallejo.