30YearWeather
San Jose in December
San Jose weather in December - United States
🌤️Mild & Comfortable

San Jose Weather in December

Plan your December trip to San Jose, United States. Based on 30 years of NASA data, expect temperatures of 15°C (high) to 6°C (low), with 25% rain probability and 8 hours of daily sunshine. Pack rain gear for around 17 rainy days.

Avg High
15°C

Hottest around day 4

Avg Low
6°C

Coolest around day 17

Rainy Days
17days

25% avg rain chance

Sunshine
8hrs/day

Winter season

San Jose December Weather Calendar

Click any day to see detailed weather information

Day 1
partly-cloudy-day
Nice
15°C20%
Day 2
partly-cloudy-day
Nice
15°C16%
Day 3
partly-cloudy-day
Nice
16°C16%
Day 4
partly-cloudy-day
Nice
16°C17%
Day 5
partly-cloudy-day
Nice
16°C18%
Day 6
partly-cloudy-day
Nice
16°C18%
Day 7
partly-cloudy-day
Nice
15°C20%
Day 8
cloudy
Cloudy
15°C22%
Day 9
cloudy
Cloudy
15°C21%
Day 10
cloudy
Cloudy
15°C22%
Day 11
cloudy
Cloudy
15°C27%
Day 12
cloudy
Cloudy
15°C30%
Day 13
cloudy
Cloudy
14°C29%
Day 14
cloudy
Cloudy
14°C28%
Day 15
cloudy
Cloudy
14°C29%
Day 16
cloudy
Cloudy
14°C28%
Day 17
cloudy
Cloudy
14°C25%
Day 18
cloudy
Cloudy
14°C27%
Day 19
cloudy
Cloudy
14°C27%
Day 20
cloudy
Cloudy
14°C28%
Day 21
cloudy
Cloudy
14°C25%
Day 22
cloudy
Cloudy
14°C24%
Day 23
cloudy
Cloudy
14°C25%
Day 24
cloudy
Cloudy
14°C27%
Day 25
cloudy
Cloudy
14°C28%
Day 26
cloudy
Cloudy
14°C30%
Day 27
cloudy
Cloudy
14°C34%
Day 28
cloudy
Cloudy
14°C33%
Day 29
cloudy
Cloudy
14°C30%
Day 30
cloudy
Cloudy
14°C26%
Day 31
cloudy
Cloudy
14°C30%

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for San Jose

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate
51/ 100
Traffic Index

Balanced traffic

Peak Daily Arrivals

0

slots per day

Peak

Jun

Low

Jul

Monthly Traffic Distribution

126
Jan
133
Feb
139
Mar
175
Apr
202
May
209
Jun
124
Jul
158
Aug
158
Sep
158
Oct
158
Nov
158
Dec
Traffic Level
Low Season

Key Connections

San Diego (SAN)
Los Angeles (LAX)
Las Vegas McCarran (LAS)
Phoenix Sky Harbor (PHX)
Seattle Tacoma (SEA)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is December a Good Time to Visit San Jose?

👍Solid choice for most travelers
Short Answer

Perfect travel weather awaits in San Jose during December - 15°C highs, 77% humidity, and 25% rain probability make this an optimal time for outdoor activities.

Decision Factors

Shoulder season - balanced conditions

76% of peak - good value with moderate crowds

Exceptional dining scene

13 Michelin-listed restaurants

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    77% humidity creates difficult conditions

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Jose in December averages 15°C with 25% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: San Jose in December

What are the temperatures in San Jose in December?

Daytime highs average 15°C, nights drop to 6°C. Temperatures remain fairly consistent.

How many rainy days in San Jose in December?

Expect around 17 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Jose in December?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is December peak season in San Jose?

This is shoulder season—moderate prices and manageable crowds.