2024 Compare Climate & Weather:
Castro Valley, CA vs Pleasanton, CA
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Highlights
On average, there are 264 sunny days per year in Pleasanton. Castro Valley averages 261 sunny days per year. The US average is 205 sunny days.
Pleasanton, California gets 18.7 inches of rain, on average, per year. Castro Valley, California gets 21.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
Pleasanton averages 0 inches of snow per year. Castro Valley averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
Pleasanton, California
Summer High: the July high is around 85.4 degrees
Winter Low: the January low is 39.3
Rain: averages 18.7 inches of rain a year
Snow: averages 0 inches of snow a year
Castro Valley, California
Summer High: the July high is around 75.6 degrees
Winter Low: the January low is 41.6
Rain: averages 21.3 inches of rain a year
Snow: averages 0 inches of snow a year
BESTPLACES COMFORT INDEX
PleasantonThe annual BestPlaces Comfort Index for Pleasanton is 8.6 (10=best), which means it is more comfortable than most places in California.
8.6 / 10
June, September and August are the most pleasant months in Pleasanton, while January and December are the least comfortable months.
Castro ValleyThe annual BestPlaces Comfort Index for Castro Valley is 8.6 (10=best), which means it is more comfortable than most places in California.
8.6 / 10
September, August and July are the most pleasant months in Castro Valley, while December and January are the least comfortable months.
Today's Weather - Castro Valley, CA
12 AM PST
Cloudy
52°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Cloudy | 50° / 72° | W 6 mph |
| Tuesday Night | Mostly Clear | 52° / 76° | WSW 5 to 10 mph |
| Wednesday Night | Partly Cloudy | 53° / 76° | WSW 7 to 13 mph |
| Thursday Night | Partly Cloudy | 54° / 74° | WSW 8 to 14 mph |
| Friday Night | Partly Cloudy | 54° / 74° | WSW 7 to 14 mph |
| Saturday Night | Partly Cloudy | 53° / 73° | WSW 8 to 15 mph |
| Sunday Night | Partly Cloudy | 53° / 71° | WSW 8 to 16 mph |
Today's Weather - Pleasanton, CA
12 AM PST
Partly Cloudy
55°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Partly Cloudy | 50° / 77° | W 7 mph |
| Tuesday Night | Mostly Clear | 52° / 80° | W 5 to 13 mph |
| Wednesday Night | Mostly Clear | 53° / 81° | WSW 7 to 14 mph |
| Thursday Night | Mostly Clear | 54° / 78° | WSW 8 to 14 mph |
| Friday Night | Mostly Clear | 53° / 77° | WSW 8 to 14 mph |
| Saturday Night | Mostly Clear | 52° / 75° | WSW 8 to 14 mph |
| Sunday Night | Mostly Clear | 52° / 74° | WSW 8 to 16 mph |
Average Monthly High / Low (°F)
| Month | Castro Valley, CA | Pleasanton, CA |
|---|
| January | 57° / 42° | 57° / 39° |
| February | 61° / 44° | 61° / 42° |
| March | 64° / 46° | 65° / 44° |
| April | 67° / 48° | 69° / 46° |
| May | 70° / 52° | 75° / 50° |
| June | 74° / 55° | 80° / 54° |
| July | 76° / 57° | 85° / 57° |
| August | 77° / 57° | 85° / 57° |
| September | 77° / 56° | 83° / 55° |
| October | 72° / 52° | 76° / 50° |
| November | 64° / 46° | 65° / 44° |
| December | 57° / 42° | 57° / 40° |
Hot, Freezing, Rainy, Snowy Days: Castro Valley / Pleasanton
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 2 / 4 | 11 / 11 | 0 / 0 |
| February | 0 / 0 | 0 / 1 | 11 / 11 | 0 / 0 |
| March | 0 / 0 | 0 / 0 | 9 / 9 | 0 / 0 |
| April | 0 / 0 | 0 / 0 | 6 / 6 | 0 / 0 |
| May | 1 / 2 | 0 / 0 | 3 / 3 | 0 / 0 |
| June | 2 / 6 | 0 / 0 | 1 / 1 | 0 / 0 |
| July | 3 / 10 | 0 / 0 | 0 / 0 | 0 / 0 |
| August | 3 / 10 | 0 / 0 | 0 / 0 | 0 / 0 |
| September | 3 / 8 | 0 / 0 | 1 / 1 | 0 / 0 |
| October | 0 / 1 | 0 / 0 | 4 / 3 | 0 / 0 |
| November | 0 / 0 | 0 / 1 | 7 / 7 | 0 / 0 |
| December | 0 / 0 | 2 / 5 | 12 / 11 | 0 / 0 |
September is the hottest month for Castro Valley with an average high temperature of 77.3°, which ranks it as cooler than most places in California. In Castro Valley, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castro Valley are September, August and July.
August is the hottest month for Pleasanton with an average high temperature of 85.4°, which ranks it as cooler than most places in California. In Pleasanton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Pleasanton are June, October and May.
January has the coldest nighttime temperatures for Castro Valley with an average of 41.6°. This is warmer than most places in California.
January has the coldest nighttime temperatures for Pleasanton with an average of 39.3°. This is warmer than most places in California.
In Castro Valley, there are 12.0 days annually when the high temperature is over 90°, which is cooler than most places in California.
In Pleasanton, there are 36.0 days annually when the high temperature is over 90°, which is cooler than most places in California.
In Castro Valley, there are 3.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.
In Pleasanton, there are 11.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.
In Castro Valley, 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 Pleasanton, 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 Castro Valley with 4.0 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 21.3 inches in Castro Valley means that it is wetter than most places in California.
February is the wettest month in Pleasanton 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 18.7 inches in Pleasanton means that it is about average compared to other places in California.
December is the rainiest month in Castro Valley with 11.6 days of rain, and July is the driest month with only 0.1 rainy days. There are 66.0 rainy days annually in Castro Valley, 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.
December is the rainiest month in Pleasanton with 11.0 days of rain, and July is the driest month with only 0.2 rainy days. There are 64.0 rainy days annually in Pleasanton, 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.
There is rarely any recorded snowfall in Castro Valley, ranking it as one of the least snowy places in California.
There is rarely any recorded snowfall in Pleasanton, ranking it as one of the least snowy places in California.
Any measurable snowfall is a rare occurance in Castro Valley.
Any measurable snowfall is a rare occurance in Pleasanton.
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 Castro Valley 
2 Reviews
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
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
Start Your Review of Castro Valley
Reviews for Pleasanton 2 Reviews
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
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
Start Your Review of Pleasanton
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