San Jose CA Weather Forecast

San Jose’s weather is consistent with the Bay Area which includes the cities of San Francisco and Oakland.

Residents and tourists alike enjoy the moderate temperatures and humidity of the Bay Area. The frequent sunshine and room temperatures make San Francisco very pleasant to live and work, which is why so many wealthy tech people have chosen to move here.

3 drivers of weather in the South San Francisco Bay area are Proximity to the Pacific Ocean and the San Francisco Bay. The cold waters of the Pacific Ocean keep San Jose cooler in the summer and milder in the winter compared to areas inland.

San Jose is situated in the Santa Clara Valley within the larger region of Silicon Valley. The surrounding mountains, including the Santa Cruz Mountains to the west and the Diablo Range to the east, help shield the city from extreme weather systems and keep it drier.

Temperature inversions, where warm air aloft traps cooler air near the surface affect the local climate and air quality.

During the summer, a cool and moist layer of air, can moves inland from the bay bringing cooler temperatures and fog to the region, especially in the morning and early afternoon. During winter nights, temperatures are more moderate.

San Jose 7 Day Forecast:

SAN JOSE WEATHER

Seasonal Weather Conditions in San Jose CA

Here’s a detailed overview of the average weather conditions in the San Jose, California area, for each season, including temperature ranges, humidity, UV reports, precipitation, sunshine days, pollution, storms, winds, and the frequency of days with temperatures over 90 degrees Fahrenheit:

Winter (December to February):

Temperature Range: Winters in San Jose are mild and cool. Highs typically range from 58°F (14°C) to 62°F (17°C), while nighttime lows range from 41°F (5°C) to 44°F (7°C).
Humidity: Humidity levels are generally low in winter, resulting in comfortable conditions.
UV Reports: UV levels are lower in winter, but sun protection is still advisable on sunny days.
Precipitation: Winter is one of the wetter seasons in San Jose, with average monthly rainfall ranging from 2 to 3 inches.
Sunshine Days: San Jose experiences a good amount of sunshine during the winter.
Air Quality/Pollution: Air quality is generally good, with minimal pollution.
Storms: Winter can bring occasional rain showers, but significant storms are rare.
Winds: Breezy conditions may occur, especially in open areas.
Days Over 90 Degrees: Days over 90 degrees Fahrenheit are extremely rare in winter.

Spring (March to May):

Temperature Range: Spring in San Jose is mild and pleasant. Highs typically range from 63°F (17°C) in March to 75°F (24°C) in May, while nighttime lows range from 44°F (7°C) to 52°F (11°C).
Humidity: Humidity levels are generally low in spring, creating comfortable conditions.
UV Reports: UV levels begin to increase in spring, so sun protection is advisable on sunny days.
Precipitation: Spring is one of the wetter seasons in San Jose, with average monthly rainfall ranging from 2 to 3 inches.
Sunshine Days: San Jose experiences a good amount of sunshine during spring.
Air Quality/Pollution: Air quality is generally good in spring, with minimal pollution.
Storms: Spring can bring occasional rain showers and breezy conditions but is typically free of severe storms.
Winds: Breezy conditions may occur, especially in open areas.
Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in spring, with mild and comfortable temperatures.

Summer (June to August):

Temperature Range: Summers in San Jose are warm to hot. Highs typically range from 80°F (27°C) to 88°F (31°C), with nighttime lows between 54°F (12°C) and 61°F (16°C).
Humidity: Humidity levels are generally low in summer, resulting in dry conditions.
UV Reports: UV levels are high in summer, requiring strong sun protection.
Precipitation: Summer is the driest season in San Jose, with minimal rainfall.
Sunshine Days: San Jose experiences an abundance of sunshine during the summer.
Air Quality/Pollution: Air quality is generally good, with minimal pollution, but occasional haze can occur.
Storms: Summer is typically free of thunderstorms and severe weather.
Winds: Breezy conditions may occur, especially in open areas.
Days Over 90 Degrees: Days over 90 degrees Fahrenheit are common in summer, making it a warm and occasionally hot season.

Fall (September to November):

Temperature Range: Fall in San Jose is warm and pleasant. Highs range from 84°F (29°C) in September to 67°F (19°C) in November, while nighttime lows range from 56°F (13°C) to 47°F (8°C).
Humidity: Humidity levels remain generally low in the fall, creating comfortable weather.
UV Reports: UV levels decrease in the fall, but sun protection is still advisable on sunny days.
Precipitation: Fall remains dry, with minimal average monthly rainfall.
Sunshine Days: Fall offers a good amount of sunshine, making it a pleasant time for outdoor activities.
Air Quality/Pollution: Air quality is generally good, with minimal pollution.
Storms: Fall can bring occasional rain showers, but severe storms are rare.
Winds: Breezy conditions may occur at times.
Days Over 90 Degrees: Days over 90 degrees Fahrenheit become rare in the fall, providing pleasant temperatures.

When you visit, you’ll appreciate San Jose’s pleasant and interesting weather which includes a comfortable climate year-round, with mild winters, warm summers, and pleasant spring and fall seasons.

San Jose Weather Forecast

San Jose CA Weather Forecast

San Jose 7 Day Forecast: