30YearWeather
San Diego in May
San Diego weather in May - United States
🌤️Mild & Comfortable

San Diego Weather in May

Plan your May trip to San Diego, United States. Based on 30 years of NASA data, expect temperatures of 20°C (high) to 14°C (low), with 3% rain probability and 8 hours of daily sunshine. The Coastal Waters averages 18°C in May. Great conditions with only 0 rainy days expected.

Avg High
20°C

Hottest around day 31

Avg Low
14°C

Coolest around day 1

Rainy Days
0days

3% avg rain chance

Sunshine
8hrs/day

Spring season

Sea Temperature in May

Coastal Waters(Ocean)

17.9°C

Monthly Average

Water Feel
💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating
🏄Cool, wetsuits recommended

Based on average sea surface temperature

Body of Water
Coastal Waters

Ocean

San Diego coastline

San Diego May Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

The most common area code for San Diego ...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for San Diego

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected
70/ 100
Traffic Index

Popular destination

Peak Daily Arrivals

0

slots per day

Peak

May

Low

Nov

Monthly Traffic Distribution

296
Jan
307
Feb
335
Mar
382
Apr
447
May
341
Jun
328
Jul
357
Aug
334
Sep
312
Oct
281
Nov
316
Dec
Traffic Level
Low Season

Key Connections

San Francisco (SFO)
Las Vegas McCarran (LAS)
Phoenix Sky Harbor (PHX)
Denver (DEN)
San Jose Norman Y. Mineta (SJC)

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 Diego?

👌Worthwhile timing with some trade-offs
Short Answer

⚠️ May falls in San Diego's typhoon season. While daily weather averages 20°C with 3% rain, tropical storms can disrupt travel. Flexible bookings recommended.

Decision Factors

Eastern Pacific Hurricane season active

Eastern Pacific zone - expect potential eastern pacific hurricane activity

Peak tourist season

100% of annual peak - expect crowds and peak prices

Ideal temperature range

20.1°C - perfect for sightseeing and outdoor activities

Excellent dry conditions

Only 3% rain probability - ideal for outdoor activities

Plenty of sunshine

11.5h of sunshine daily

Exceptional dining scene

34 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 20.1°C temperatures and low 3% rain risk

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 20.1°C, 3% rain chance

  • 📸
    Photographers

    11.5h sunshine, 53% clear skies for golden hour shots

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 100/100 with romantic weather conditions

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only 17.9°C - too cold for comfortable swimming

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 👴
    Elderly travelers

    75% humidity creates difficult conditions

  • 💼
    Business travelers

    Storm season may cause flight disruptions

930 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Diego in May averages 20°C with 3% precipitation probability."

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

Frequently Asked Questions: San Diego in May

What are the temperatures in San Diego in May?

Daytime highs average 20°C, nights drop to 14°C. Temperatures remain fairly consistent.

How many rainy days in San Diego in May?

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

What to wear in San Diego in May?

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

Is May peak season in San Diego?

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