San Jose, CA Weather Forecast & Climate Guide
San Jose has a Mediterranean climate with warm, dry summers and mild, wet winters.
Climate type: Mediterranean (Köppen Csa/Csb)
San Jose Climate Overview
Warm summers with low humidity. Mild winters with most rain occurring November-March.
Protected from coastal fog by mountains. Drought conditions are common.
San Jose Weather by Season
spring
Spring is mild and sunny with highs in the 60s-70s°F. Cherry blossoms, wildflowers, and hills that briefly turn green before drying out for the long summer.
summer
Summers are warm and dry with highs in the low 80s°F and cool evenings. Less fog than San Francisco, more heat than Monterey — Silicon Valley's "Goldilocks" weather.
fall
Fall brings the warmest weather of the year, with September and October often topping summer averages. Santa Ana-like conditions occasionally bring heat waves.
winter
Winters are mild with highs in the upper 50s°F and lows in the 40s°F. Most of the city's 15 inches of annual rain falls between December and March.
San Jose Average Monthly Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 58° | 62° | 66° | 70° | 75° | 80° | 83° | 83° | 81° | 74° | 64° | 57° |
| Low °F | 42° | 44° | 45° | 47° | 51° | 55° | 57° | 57° | 55° | 51° | 46° | 42° |
Best Time to Visit San Jose
Any time — San Jose's climate is consistently pleasant. April-May and September-October are particularly nice with warm days, cool nights, and minimal rain.
Severe Weather Risks
- Wildfires
- Heat waves
- Atmospheric rivers
- Drought
- Earthquakes
Weather Facts About San Jose
- >San Jose averages 300+ sunny days per year, more than San Francisco or Los Angeles.
- >Mountains to the west block coastal fog from reaching the city, keeping Silicon Valley warmer and drier than SF.
- >The surrounding hills create a distinct microclimate that's warmer than the coast but cooler than the Central Valley.
San Jose Weather FAQ
When is the best time to visit San Jose?
September and October deliver the warmest, driest weather with minimal fog. Spring (April-May) is also beautiful with wildflowers. The climate is pleasant year-round with only minor variation.
Is San Jose different from San Francisco weather?
Significantly. San Jose is warmer, sunnier, and foggier-free than SF. Summer highs are often 15-20°F warmer in San Jose than at the SF coast. The mountains block the marine layer.
Does San Jose get cold?
Rarely. Winter highs average in the upper 50s°F and lows in the 40s°F. Freezing temperatures are uncommon. Snow is essentially unheard of in the city itself.
How much does San Jose rain?
About 15 inches per year, almost entirely between November and April. Summer is essentially dry. The 2022-23 winter brought exceptional rainfall and flooding from atmospheric river events.