The month in detail
What to expect in April
Spring marks the start of the good season in San Diego. Temperatures rise (19°C) and tourists have not yet arrived en masse. Rain is virtually absent (8% of days) — ideal for planning without a backup. A good balance between weather and crowds, even if July (9.2/10) remains theoretically better.
April ranks 8 out of 12 months in San Diego. Compared to March: +2°C daytime, 10 pts fewer rainy days, +0.8h of sun per day.
This month's conditions
What it's like in April
UV index
7 · high
sunscreen and hat advised
Feels like
comfortable
11°
Sea
17°C
cold, for the brave
Daylight
12.8h of daylight
Air quality
good
AQI 34
Compare
Is April the right month?
The best month in San Diego is July (9.2/10), 1.2 pt higher than April.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · San Diego
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
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🎟️ Activities & tours · San Diego
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · United States
🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthAugust · 25°C
❄️Coolest monthJanuary · 17°C
🌧️Rainiest month ⓘMarch · 18%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in April
If April doesn't convince you for this destination, compare with others.
Similar climate
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EssaouiraMorocco
El HierroSpain
SantoriniGreece
Location
Where is San Diego ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
United StatesTemperate oceanic climate with a 9.2 → 7.4 gap between best and worst month. 10 years of ERA5 data to choose by project.
32.72°N · 117.16°W
Questions
Frequently asked questions
What is the best time to visit San Diego?
July is the best month with 24.0°C highs, 18.0°C lows, 9.8h of sunshine and 1.0% rainy days. The months of July & August offer comparable conditions.
How many hours of sunshine does San Diego get in July?
San Diego averages 9.8 sunshine hours per day in July. It is the sunniest month with a climate score of 8.8/10.
What is the rainiest month in San Diego?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in San Diego in July?
In July, overnight lows reach 18.0°C, while afternoon highs average 24.0°C.
Is San Diego good in winter?
In winter (December-February), San Diego scores 7.1/10 on average — Decent period conditions for cultural visits.. The best month overall remains July with a score of 8.8/10.
When should you avoid San Diego?
January is the most difficult month to visit San Diego, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in San Diego in April?
In April, the sea averages 17°C in San Diego: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in San Diego in April?
The average UV index reaches 7 in April in San Diego (high), with about 12.8h of daylight. Sunscreen and hat advised.