30YearWeather
San Francisco in April
San Francisco weather in April - United States
🌤️Mild & Comfortable

San Francisco Weather in April

Plan your April trip to San Francisco, United States. Based on 30 years of NASA data, expect temperatures of 16°C (high) to 9°C (low), with 11% rain probability and 8 hours of daily sunshine. The Pacific Ocean averages 13°C in April. Great conditions with only 0 rainy days expected.

Avg High
16°C

Hottest around day 30

Avg Low
9°C

Coolest around day 2

Rainy Days
0days

11% avg rain chance

Sunshine
8hrs/day

Spring season

Sea Temperature in April

Pacific Ocean

13°C

Monthly Average

Water Feel
🥶Polar Plunge

Consider a wetsuit for extended swimming

Swim Rating
❄️Cold water hazard

Based on average sea surface temperature

Body of Water
Pacific Ocean

San Francisco coastline

San Francisco April Weather Calendar

Click any day to see detailed weather information

Essential Travel Info for San Francisco

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

Thearea codesfor San Francisco are 415 a...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for San Francisco

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

Major Hub
100/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

Jul

Low

Jun

Monthly Traffic Distribution

497
Jan
532
Feb
563
Mar
577
Apr
633
May
0
Jun
2177
Jul
1338
Aug
2051
Sep
1911
Oct
1736
Nov
1892
Dec
Traffic Level
Low Season

Key Connections

Los Angeles (LAX)
Seattle Tacoma (SEA)
New York John F Kennedy (JFK)
Las Vegas McCarran (LAS)
Phoenix Sky Harbor (PHX)

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 April a Good Time to Visit San Francisco?

👍Very good conditions overall
Short Answer

Don't expect beach weather in San Francisco's April: 13°C cold seas despite 16°C air temps. Coastal scenery remains beautiful, just pack warm layers.

Decision Factors

Off-peak season - fewer crowds

Only 27% of peak - better deals and quiet crowds

Excellent dry conditions

Only 11% rain probability - ideal for outdoor activities

Cold sea - swimming challenging

13°C sea temperature - Polar Plunge

Plenty of sunshine

11h of sunshine daily

Exceptional dining scene

151 Michelin-listed restaurants

Good For

  • 💰
    Budget travelers

    Off-peak pricing with acceptable weather conditions

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 16.3°C, 11% rain chance

  • 📸
    Photographers

    11h sunshine, 54% clear skies for golden hour shots

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 90/100 with romantic weather conditions

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only 13°C - too cold for comfortable swimming

  • 👴
    Elderly travelers

    76% humidity creates difficult conditions

900 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Francisco in April averages 16°C with 11% precipitation probability."

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

Frequently Asked Questions: San Francisco in April

What are the temperatures in San Francisco in April?

Daytime highs average 16°C, nights drop to 9°C. Temperatures remain fairly consistent.

How many rainy days in San Francisco in April?

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

What to wear in San Francisco in April?

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

Is April peak season in San Francisco?

This is shoulder season—moderate prices and manageable crowds.