30YearWeather
San Antonio in May
San Antonio weather in May - United States
☀️Hot & Sunny

San Antonio Weather in May

Plan your May trip to San Antonio, United States. Based on 30 years of NASA data, expect temperatures of 31°C (high) to 20°C (low), with 29% rain probability and 8 hours of daily sunshine. Pack rain gear for around 26 rainy days.

Avg High
31°C

Hottest around day 31

Avg Low
20°C

Coolest around day 1

Rainy Days
26days

29% avg rain chance

Sunshine
8hrs/day

Spring season

San Antonio May 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

unlock smart flight estimates

Add your home location in settings to see airport details.

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 May a Good Time to Visit San Antonio?

👌A reasonable choice for your trip
Short Answer

May isn't San Antonio's most comfortable season - 31°C and sticky 71% humidity will challenge most visitors. Consider air-conditioned tours and plan for afternoon breaks.

Decision Factors

Feels significantly hotter than 30.6°C

Heat index: 37°C due to 71% humidity

Peak tourist season

97% of annual peak - expect crowds and peak prices

Plenty of sunshine

10.1h of sunshine daily

Exceptional dining scene

15 Michelin-listed restaurants

Good For

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 👴
    Elderly travelers

    Heat index of 37°C poses health risks

  • 🌡️
    Heat-sensitive visitors

    37°C feels-like temperature creates discomfort

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Antonio in May averages 31°C with 29% precipitation probability."

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

Frequently Asked Questions: San Antonio in May

What are the temperatures in San Antonio in May?

Daytime highs average 31°C, nights drop to 20°C. Temperatures remain fairly consistent.

How many rainy days in San Antonio in May?

Expect around 26 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Antonio in May?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is May peak season in San Antonio?

This is shoulder season—moderate prices and manageable crowds.