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

San Antonio Weather in December

Plan your December trip to San Antonio, United States. Based on 30 years of NASA data, expect temperatures of 18°C (high) to 8°C (low), with 15% rain probability and 8 hours of daily sunshine. Great conditions with only 0 rainy days expected.

Avg High
18°C

Hottest around day 1

Avg Low
8°C

Coolest around day 23

Rainy Days
0days

15% avg rain chance

Sunshine
8hrs/day

Winter season

San Antonio December Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

As of Dec 2021, San Antonio has 5G from ...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for San Antonio

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate
46/ 100
Traffic Index

Balanced traffic

Peak Daily Arrivals

0

slots per day

Peak

Jun

Low

Feb

Monthly Traffic Distribution

111
Jan
109
Feb
130
Mar
158
Apr
158
May
163
Jun
119
Jul
135
Aug
135
Sep
135
Oct
135
Nov
135
Dec
Traffic Level
Low Season

Key Connections

Dallas-Fort Worth (DFW)
Denver (DEN)
Phoenix Sky Harbor (PHX)
Dallas Love Field (DAL)
Houston George Bush (IAH)

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 Antonio?

👍Very good conditions overall
Short Answer

December delivers San Antonio's best weather - 18°C days, rare rain (15%), and comfortable 68% humidity. Book accommodation early as this is well-known as an excellent period.

Decision Factors

Shoulder season - balanced conditions

83% of peak - good value with moderate crowds

Exceptional dining scene

15 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 18.3°C temperatures and low 15% rain risk

  • 👴
    Elderly travelers

    Comfortable 18.3°C temperature range with manageable humidity

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 18.3°C, 15% rain chance

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 96/100 with romantic weather conditions

Who Should Avoid

Suitable for most traveler types

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Antonio in December averages 18°C with 15% precipitation probability."

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

Frequently Asked Questions: San Antonio in December

What are the temperatures in San Antonio in December?

Daytime highs average 18°C, nights drop to 8°C. Temperatures remain fairly consistent.

How many rainy days in San Antonio in December?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Antonio in December?

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

Is December peak season in San Antonio?

This is typically peak season with higher prices. Book 2-3 months ahead.