Temperature range
Typical highs and lows
High25.4°C
Low8.6°C
The broad yearly range between warm daytime highs and the coolest overnight lows.
United States San Diego, United States
San Diego experiences a mild year-round climate, where average temperatures vary from a low of 17°C / 63°F in January to a high of 25°C / 78°F in August.
Annual rainfall patterns show an average of 28 mm / 1.1 inches per month, with February being the wettest (75 mm / 3 inches) and June the driest (2 mm / 0.08 inches).
Sun intensity varies throughout the year, with UV levels reaching 9 in June and falling to 4 in December; strong sun protection is essential during summer months.
The longest days occur in June with around 14.3 hours of daylight, while December has the shortest days at about 10 hours.
Trip planning
Plan your trip
Find the best dates. Understand the conditions. Pack with confidence.
Climate overview
Climate at a glance
The big-picture stats that matter for planning your visit to San Diego.
Rain pattern
Wettest point of the year
75 mm
February carries the highest typical rainfall load.
Sun exposure
Typical peak UV band
High (7.0)
A fast read on how strong midday sun typically gets across the year.
Daylight window
Seasonal daylight range
10 hrsto14 hrs
Useful for gauging how much sightseeing time you get in shorter versus longer seasons.
Wind profile
Typical breeze strength
9 km/h
May is typically the breeziest month.
Humidity
Typical moisture range
72 %to78 %
A quick signal for how dry, comfortable, or heavy the air tends to feel.
When should I go?
Our top-rated months for visiting San Diego, based on long-term weather comfort and conditions
Typical weather by month
Compare all monthsTip: click on a card to see detailed daily weather averages for that month.
How San Diego compares
See how it ranks against the rest of United States for key metrics.
HOTTEST (AVG)
in United States
#11 / 20
COOLEST (AVG)
in United States
#11 / 20
WETTEST (TOTAL)
in United States
#18 / 20
WINDIEST (AVG)
in United States
#15 / 20
HIGHEST UV
in United States
#8 / 20
MOST HUMID
in United States
#7 / 20
Short term outlook
Visiting soon? Here's the next 7 days of weather for San Diego, or see an hourly breakdown for the next 14 days.
Travel planning FAQ
Frequently asked questions
Quick answers to the weather questions you ask the most.
How does the weather in San Diego feel over the year?
Across the year, daytime highs average about 21°C (70°F), with nights near 13°C (55°F). Overall it feels mild by day and cool after dark. You may notice some humidity at times. Daylight is fairly typical, with enough time for sightseeing. Expect a mix of sun and cloud across the year.
When is the best time to visit San Diego for dry weather?
The driest month is usually June, with around 2 mm (0.08 in) of rain. Most other months sit somewhere in between, with a mix of dry and showery days.
When is sun exposure strongest in San Diego?
UV tends to peak in June, when UV levels frequently reach very high levels (around 9), so strong sun protection is essential, especially around midday.
Is San Diego a windy place?
Across the year, average winds sit around 9 km/h (6 mph), with gusts on windier days up to about 44 km/h (27 mph). Overall it is it often feels breezy, especially in more exposed spots or along the coast.
How much daylight does San Diego get?
On average, days offer about 12 hours of daylight. Daylight is fairly typical, with enough time for sightseeing.