2024 Compare Climate & Weather:
Boulder, CO vs San Jose, CA
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Highlights
On average, there are 257 sunny days per year in San Jose. Boulder averages 245 sunny days per year. The US average is 205 sunny days.
San Jose, California gets 17.2 inches of rain, on average, per year. Boulder, Colorado gets 18.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
San Jose averages 0 inches of snow per year. Boulder averages 71.1 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
San Jose, California
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 41.6
Rain: averages 17.2 inches of rain a year
Snow: averages 0 inches of snow a year
Boulder, Colorado
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 18.9
Rain: averages 18.1 inches of rain a year
Snow: averages 71.1 inches of snow a year
BESTPLACES COMFORT INDEX
San JoseThe annual BestPlaces Comfort Index for San Jose is 8.8 (10=best), which means it is more comfortable than most places in California.
8.8 / 10
August, July and June are the most pleasant months in San Jose, while January and December are the least comfortable months.
BoulderThe annual BestPlaces Comfort Index for Boulder is 7.1 (10=best), which means it is about average compared to other places in Colorado.
7.1 / 10
September, June and August are the most pleasant months in Boulder, while December and January are the least comfortable months.
Today's Weather - Boulder, CO
3 AM PST
Clear
66°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Clear | 60° / 94° | S 3 mph |
| Wednesday Night | Partly Cloudy | 64° / 95° | W 7 to 10 mph |
| Thursday Night | Partly Cloudy | 62° / 85° | NW 3 to 8 mph |
| Friday Night | Chance Showers And Thunderstorms then Mostly Cloudy | 61° / 90° | WSW 8 mph |
| Saturday Night | Mostly Clear | 61° / 91° | WSW 7 mph |
| Sunday Night | Partly Cloudy | 59° / 88° | NW 5 to 8 mph |
| Monday Night | Slight Chance Showers And Thunderstorms then Partly Cloudy | 58° / 87° | SW 6 to 10 mph |
Today's Weather - San Jose, CA
3 AM PST
Clear
66°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Clear | 58° / 83° | SSE 2 mph |
| Wednesday Night | Mostly Clear | 54° / 84° | SSE 3 to 8 mph |
| Thursday Night | Clear | 53° / 86° | W 2 to 8 mph |
| Friday Night | Mostly Clear | 51° / 82° | WNW 3 to 9 mph |
| Saturday Night | Clear | 50° / 80° | W 3 to 12 mph |
| Sunday Night | Clear | 52° / 80° | WNW 5 to 13 mph |
| Monday Night | Mostly Clear | 52° / 81° | WNW 3 to 13 mph |
Average Monthly High / Low (°F)
| Month | Boulder, CO | San Jose, CA |
|---|
| January | 47° / 19° | 58° / 42° |
| February | 48° / 20° | 62° / 44° |
| March | 55° / 27° | 66° / 46° |
| April | 62° / 34° | 69° / 48° |
| May | 72° / 43° | 74° / 52° |
| June | 82° / 51° | 79° / 55° |
| July | 88° / 57° | 82° / 58° |
| August | 86° / 55° | 82° / 58° |
| September | 78° / 46° | 80° / 56° |
| October | 66° / 36° | 74° / 52° |
| November | 54° / 26° | 64° / 46° |
| December | 45° / 18° | 58° / 42° |
Hot, Freezing, Rainy, Snowy Days: Boulder / San Jose
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 28 / 2 | 5 / 10 | 5 / 0 |
| February | 0 / 0 | 25 / 1 | 5 / 10 | 5 / 0 |
| March | 0 / 0 | 23 / 0 | 7 / 10 | 6 / 0 |
| April | 0 / 1 | 13 / 0 | 9 / 6 | 4 / 0 |
| May | 1 / 1 | 2 / 0 | 11 / 3 | 1 / 0 |
| June | 6 / 3 | 0 / 0 | 9 / 1 | 0 / 0 |
| July | 14 / 4 | 0 / 0 | 9 / 0 | 0 / 0 |
| August | 9 / 4 | 0 / 0 | 10 / 0 | 0 / 0 |
| September | 3 / 3 | 1 / 0 | 7 / 1 | 0 / 0 |
| October | 0 / 1 | 10 / 0 | 6 / 3 | 2 / 0 |
| November | 0 / 0 | 22 / 0 | 5 / 7 | 4 / 0 |
| December | 0 / 0 | 28 / 2 | 5 / 10 | 5 / 0 |
July is the hottest month for Boulder with an average high temperature of 88.1°, which ranks it as about average compared to other places in Colorado. In Boulder, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder are September, June and May.
August is the hottest month for San Jose with an average high temperature of 81.9°, which ranks it as cooler than most places in California. In San Jose, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Jose are June, September and May.
December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.
December has the coldest nighttime temperatures for San Jose with an average of 41.5°. This is warmer than most places in California.
In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.
In San Jose, there are 16.9 days annually when the high temperature is over 90°, which is cooler than most places in California.
In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.
In San Jose, there are 4.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.
In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.
In San Jose, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.
May is the wettest month in Boulder with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Boulder means that it is wetter than most places in Colorado.
February is the wettest month in San Jose with 3.5 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 17.2 inches in San Jose means that it is about average compared to other places in California.
May is the rainiest month in Boulder with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 88.0 rainy days annually in Boulder, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.
December is the rainiest month in San Jose with 10.3 days of rain, and July is the driest month with only 0.2 rainy days. There are 61.8 rainy days annually in San Jose, 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.
An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.
There is rarely any recorded snowfall in San Jose, ranking it as one of the least snowy places in California.
March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.
Any measurable snowfall is a rare occurance in San Jose.
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 Boulder 
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 Boulder
Reviews for San Jose 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 San Jose
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