San Jose, CA — Weather Guide

San Jose's weather, with average highs ranging from 57°F in winter to 70°F in early fall, offers a mild climate that attracts buyers seeking year-round comfort. Neighborhood microclimates, from the cooler Almaden Valley to the warmer Evergreen area, mean your choice of neighborhood actually tailors your daily weather experience. Surprisingly, despite its Silicon Valley location, San Jose sees more rainy days in winter than many assume, challenging the "always sunny" stereotype.

57°F to 70°FAvg High
20 inAnnual Rain
300Sunny Days/Year
7 distinctMicroclimates

Fun facts

Fog Bowl

10°F

The "Fog Bowl" mornings in the Alum Rock area can chill homes by 10°F compared to downtown, affecting heating needs and energy bills.

Heat Swap

15°F

San Jose's Almaden Valley can be up to 15°F warmer than the nearby Evergreen neighborhood, a drastic microclimate swing within city limits.

Sunshine Rival

300 days

Despite being in Silicon Valley, San Jose averages 300 sunny days a year, rivaling desert cities like Phoenix in sunshine, ideal for solar investment.

Fog Family

Karl's cousin

Local surfers joke that the Bay fog is "Karl's cousin," referencing San Francisco's famous fog, highlighting how fog patterns influence coastal property desirability.

Month-by-month guide

Jan 57° / 46° Good Cozy & crisp, post-holiday calm January buyers can find less competition in neighborhoods like Willow Glen as many sellers hold off after the holidays.
Feb 60° / 48° Good Mild & mellow, early bloom February's mild weather is perfect for touring family-friendly areas like Almaden Valley before spring listings pick up.
Mar 62° / 49° Busy Spring buzz, cherry blossoms March kicks off the busy spring market; prime time to explore trendy downtown San Jose condos.
Apr 63° / 50° Busy Bloom & brighten, garden strolls April’s sunny days make it a hotspot for open houses in neighborhoods like Rose Garden and Japantown.
May 64° / 51° Great Sunshine & spring, park days May is ideal for buyers seeking outdoor space, with plenty of sunny days to check out parks in Cambrian and Evergreen.
Jun 66° / 53° Great Early summer glow, fog lifts June offers great weather and fewer buyers than summer peak; perfect for viewing homes in neighborhoods like West San Jose.
Jul 66° / 54° Busy Sunny & vibrant, tech buzz July heats up the market; expect competitive bids especially near tech hubs like North San Jose.
Aug 68° / 55° Busy Hot & lively, backyard BBQs August keeps the summer selling frenzy going; consider neighborhoods like Evergreen for family-friendly options.
Sep 70° / 55° Great Indian summer, warm & clear September’s Indian summer vibe means great conditions for home inspections in areas like Willow Glen.
Oct 69° / 54° Good Crisp & colorful, harvest vibes October’s cooler temps and fewer buyers make it a good time to negotiate in neighborhoods like Japantown.
Nov 62° / 50° Good Rainy & reflective, cozy indoors November’s rainy days slow the market; use this time to find deals in South San Jose.
Dec 57° / 46° Good Holiday cheer, quiet streets December offers holiday charm and less competition; check out festive events in downtown San Jose.

Neighborhood microclimates

+5°F warmer

Willow Glen

72°F avg

Fog

Willow Glen is known for its charming tree-lined streets and a downtown area dotted with cozy cafes and boutiques. It stays sunnier and warmer here, perfect for garden lovers eyeing a spring bloom in their yard.

+2°F warmer

Downtown San Jose

64°F avg

Fog

Downtown San Jose bakes in the urban heat with its dense grid of tech offices and bustling nightlife spots. Expect warmer evenings perfect for rooftop bars but pack sunscreen for open house tours by day.

3°F cooler

Rose Garden

60°F avg

Fog

Rose Garden neighborhood enjoys a cooler vibe thanks to its proximity to the Guadalupe River and abundant greenery. It's quiet and fog creeps in some mornings, ideal for those seeking a calm retreat close to nature.

4°F cooler

Almaden Valley

58°F avg

Fog

Almaden Valley rests farther south with rolling hills and a slightly breezier atmosphere coming off the Santa Cruz Mountains. This area trades some warmth for fresh air and scenic hiking nearby.

5°F cooler

Berryessa

56°F avg

Fog

Berryessa is known for its suburban feel and is closer to the foothills, bringing more rainfall and lush green spaces. It’s a good pick if you love water views and don’t mind a bit more rain in winter.

+3°F warmer

Japantown

67°F avg

Fog

Japantown holds a special cultural spot with its historic shops and annual cherry blossom festival. It enjoys mild temperatures and less fog, making it one of the sunnier spots in the city.

What to wear in San Jose

The Layer Master

Layer your look with a light jacket and a scarf—spring mornings can start foggy and cool but afternoons warm up nicely, especially around Willow Glen and Japantown.

Spring

Sunshine Ready

Bring sunblock and sunglasses for open houses in Downtown San Jose and Willow Glen where heat and sun are strong, but keep a light hoodie handy for sudden evening breezes.

Summer

Foggy Chic

Opt for smart layering: a cozy sweater over a breathable shirt is perfect for Berryessa and Rose Garden's cooler, foggier mornings and sunny afternoons.

Fall

Wet Weather Warrior

Rain boots and a waterproof jacket are your best friends in Berryessa and Almaden Valley, where winter showers are common but temperatures rarely dip below 45°F.

Winter

The bottom line for buyers

Buy in Bloom

Late spring to early summer, especially May and June, is prime for buying because the weather is stable, and inventory tends to peak before the summer rush drives prices up.

Microclimate Gold

Investing in neighborhoods like Willow Glen or Rose Garden offers a sweet spot of moderate temperatures and high demand, making them weather-smart bets for value appreciation.

Rate vs Weather

Interest rates fluctuate more than the weather, so secure your mortgage rate quickly but choose your house thoughtfully; "marry the house, date the rate" is key in San Jose's market.

Time Your Tour

Visit your target neighborhoods at different times of day to experience local microclimates firsthand, from foggy mornings in the Santa Teresa hills to sunnier afternoons downtown.

Seller calendar

April — list

Sunny days and blooming gardens in neighborhoods like Rose Garden attract buyers.

May — photograph

Clear skies and lush greenery create perfect photo ops in Cambrian and Evergreen.

September — stage

Warm Indian summer weather highlights outdoor spaces in Willow Glen homes.

October — list

Cooler weather with less competition helps listings stand out in Japantown.

Home maintenance

Spring

Inspect and clean gutters to handle the reducing but still present spring rains.

San Jose gets around 1.5 inches of rain in April and 0.7 inches in May, which can cause early spring clogs.

Check exterior paint and wood for moisture damage from winter rains and fog.

The partly rainy and foggy spring can lead to moisture-related wear on home exteriors.

Summer

Service your HVAC to prepare for dry, warm days with temperatures averaging mid-60s to high 60s.

With almost no rain in July and August and sunny skies, air conditioning is key for comfort.

Maintain landscaping with drought-tolerant plants and efficient irrigation.

San Jose’s dry summer months (0-0.1 inch rain) require careful water management.

Fall

Clean roofs and gutters to prepare for increasing rainfall starting October.

Rain inches jump to over an inch in October and continue rising into winter.

Seal cracks and inspect windows to keep out chilly fall and winter air.

With cooler temps and increasing precipitation, proper sealing ensures energy efficiency.

Winter

Check for leaks and waterproof basements due to highest rainfall months (Nov, Dec, Jan).

San Jose’s rain peaks at 4+ inches in winter months, risking water intrusion.

Inspect heating systems and chimneys for safety and efficiency during cooler months.

Winter highs of around 57°F and lows of mid-40s keep heating in demand.

Explore nearby

Willow Glen weather & microclimate 72°F avg
Downtown San Jose weather & microclimate 64°F avg
Rose Garden weather & microclimate 60°F avg
Almaden Valley weather & microclimate 58°F avg
Berryessa weather & microclimate 56°F avg
Japantown weather & microclimate 67°F avg