2025 Compare Climate & Weather:
San Ramon, CA vs Hayward, CA

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Highlights

On average, there are 257 sunny days per year in Hayward. San Ramon averages 256 sunny days per year. The US average is 205 sunny days.

Hayward, California gets 18 inches of rain, on average, per year. San Ramon, California gets 19 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Hayward averages 0 inches of snow per year. San Ramon averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Hayward, California
Summer High: the July high is around 76.2 degrees
Winter Low: the January low is 42.1
Rain: averages 18 inches of rain a year
Snow: averages 0 inches of snow a year

San Ramon, California
Summer High: the July high is around 84.4 degrees
Winter Low: the January low is 39.2
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

Hayward

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

8.7 / 10

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

San Ramon

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

8.5 / 10

June, September and October are the most pleasant months in San Ramon, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	San Ramon, CA	Hayward, CA
January	57° / 39°	58° / 42°
February	61° / 42°	61° / 45°
March	65° / 44°	64° / 47°
April	69° / 46°	68° / 49°
May	74° / 50°	71° / 52°
June	80° / 54°	74° / 55°
July	84° / 56°	76° / 57°
August	84° / 56°	78° / 58°
September	82° / 55°	77° / 57°
October	76° / 50°	72° / 53°
November	65° / 44°	64° / 47°
December	57° / 40°	58° / 42°

Hot, Freezing, Rainy, Snowy Days: San Ramon / Hayward

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

July is the hottest month for San Ramon with an average high temperature of 84.4°, which ranks it as cooler than most places in California. In San Ramon, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Ramon are June, October and May.

August is the hottest month for Hayward with an average high temperature of 77.5°, which ranks it as cooler than most places in California. In Hayward, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hayward are August, September and July.

January has the coldest nighttime temperatures for San Ramon with an average of 39.2°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Hayward with an average of 42.1°. This is warmer than most places in California.

In San Ramon, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Hayward, there are 9.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Ramon, there are 11.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Hayward, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In San Ramon, 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 Hayward, 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 San Ramon with 3.5 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 19.0 inches in San Ramon means that it is about average compared to other places in California.

February is the wettest month in Hayward with 3.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 18.0 inches in Hayward means that it is about average compared to other places in California.

December is the rainiest month in San Ramon with 10.9 days of rain, and July is the driest month with only 0.2 rainy days. There are 64.2 rainy days annually in San Ramon, 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 Hayward with 11.5 days of rain, and July is the driest month with only 0.1 rainy days. There are 64.7 rainy days annually in Hayward, which is rainier than most places in California. The rainiest season is Spring when it rains 51% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in San Ramon.

Any measurable snowfall is a rare occurance in Hayward.

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 San Ramon 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

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Reviews for Hayward 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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2025 Compare Climate & Weather:
San Ramon, CA vs Hayward, CA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Ramon / Hayward

January has the coldest nighttime temperatures for San Ramon with an average of 39.2°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Hayward with an average of 42.1°. This is warmer than most places in California.

In San Ramon, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Hayward, there are 9.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Ramon, there are 11.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Hayward, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

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

Any measurable snowfall is a rare occurance in San Ramon.

Any measurable snowfall is a rare occurance in Hayward.

DID YOU KNOW?

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Reviews for Hayward 2 Reviews

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2025 Compare Climate & Weather:San Ramon, CA vs Hayward, CA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Ramon / Hayward

January has the coldest nighttime temperatures for San Ramon with an average of 39.2°. This is warmer than most places in California.January has the coldest nighttime temperatures for Hayward with an average of 42.1°. This is warmer than most places in California.

In San Ramon, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.In Hayward, there are 9.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Ramon, there are 11.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.In Hayward, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

Any measurable snowfall is a rare occurance in San Ramon.Any measurable snowfall is a rare occurance in Hayward.

DID YOU KNOW?

Reviews for San Ramon 2 Reviews

Reviews for Hayward 2 Reviews

Most Recent Searches On Compare Climate & Weather

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Zips In San Ramon, California

Zips In HAYWARD, CALIFORNIA

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2025 Compare Climate & Weather:
San Ramon, CA vs Hayward, CA

January has the coldest nighttime temperatures for San Ramon with an average of 39.2°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Hayward with an average of 42.1°. This is warmer than most places in California.

In San Ramon, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Hayward, there are 9.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Ramon, there are 11.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Hayward, there are 2.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

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

Any measurable snowfall is a rare occurance in San Ramon.

Any measurable snowfall is a rare occurance in Hayward.