United States San Francisco Weather in April — Climate Guide
April in San Francisco is Good
April is Good for San Francisco.
April is excellent — Cherry Blossom Festival in Japantown (largest outside Japan), warming weather, no fog yet. Hotel rates still moderate. Locals begin Golden Gate Bridge bike rides as the wind dies down. Strong shoulder-season pick.
Travel score
San Francisco April Weather Stats
Avg High
17°C
Avg Low
11°C
Rainy Days
5
35mm total
Sunshine
9h
Daily avg
Humidity
70%
Comfortable
UV Index
7
High
Wind
14 km/h
Gusts 32
Sea Temp
13°C
Avg water temp
Crowds
Moderate
At attractions
April Sunrise & Sunset
Air Quality
PM2.5
9 μg/m³
PM10
18 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
16°C
Nighttime
10°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 32 km/h
Activities Recommended for April
April Travel Pros & Cons
Pros
- Weather 17/11°C
- Cherry Blossom Festival
- Less foggy than summer
Cons
- Windy afternoons
April Events & Festivals
- Easter
- Japantown Cherry Blossom Festival (mid-April, 2 weekends)
San Francisco in April — Full Picture
April is excellent — Cherry Blossom Festival in Japantown (largest outside Japan), warming weather, no fog yet. Hotel rates still moderate. Locals begin Golden Gate Bridge bike rides as the wind dies down. Strong shoulder-season pick.
What to Wear & What to Pack
Spring — high 17°C, low 11°C. Light jacket + sweater. Cherry blossoms peak. Bring sunglasses (UV index 7).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current17.3°C
11°C
5.3/mo
Summer (Jun·Jul·Aug)
19.3°C
13.3°C
0.3/mo
Autumn (Sep·Oct·Nov)
20.3°C
12.7°C
3.7/mo
Winter (Dec·Jan·Feb)
14.3°C
8.3°C
10.3/mo
San Francisco Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 8° | 11d·110mm | 5h | 75% | 3 | Quiet | Low season | |
| 15° | 9° | 10d·110mm | 6h | 73% | 4 | Quiet | Low season | |
| 16° | 10° | 8d·75mm | 8h | 70% | 5 | Moderate | Shoulder | |
| 17° | 11° | 5d·35mm | 9h | 70% | 7 | Moderate | Shoulder | |
| May (Best) | 19° | 12° | 3d·18mm | 10h | 70% | 8 | Busy | Peak |
| 19° | 13° | 1d·5mm | 9h | 75% | 9 | Very busy | Peak | |
| 19° | 13° | 0d·0mm | 9h | 78% | 10 | Very busy | Peak | |
| 20° | 14° | 0d·0mm | 9h | 78% | 9 | Very busy | Peak | |
| 22° | 14° | 1d·8mm | 10h | 73% | 8 | Very busy | Peak | |
| 21° | 13° | 3d·28mm | 8h | 73% | 6 | Very busy | Peak | |
| 18° | 11° | 7d·70mm | 7h | 73% | 4 | Busy | Peak | |
| 14° | 8° | 10d·110mm | 5h | 75% | 3 | Very busy | Peak |
View Other Months
San Francisco April Hotel Picks
Frequently Asked Questions
Is April a good time to visit San Francisco?
San Francisco in April is Good. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in San Francisco in April?
San Francisco April averages a high of 17°C and a low of 11°C.
Does it rain much in San Francisco in April?
San Francisco April averages 35mm of rainfall over about 5 rainy days.
What should I wear in San Francisco in April?
Spring — high 17°C, low 11°C. Light jacket + sweater. Cherry blossoms peak. Bring sunglasses (UV index 7).
What time are sunrise and sunset in San Francisco in April?
San Francisco April sunrise is 06:35 and sunset is 19:45, with 13h 10m of daylight.
What's the air quality like in San Francisco in April?
San Francisco April air quality (AQI) averages 35, rated Good. PM2.5 averages 9μg/m³.
What activities are recommended in San Francisco in April?
In April, San Francisco is great for Golden Gate Bridge bike, Alcatraz tour, Japantown Cherry Blossom Festival.
Is April peak season in San Francisco?
San Francisco April crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit San Francisco
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.