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Best time to visit San Diego, CA, USA

Our verdict

The best time to visit San Diego is November

Are you looking for the best time to visit San Diego? Well, you’re in the right place! Although San Diego is a great destination to visit almost all year round, November is the best time to go due to its perfect climate conditions. Around this time of year, flights and accommodation can also be cheaper as it is outside of key peak holiday seasons if you book well enough in advance.

In the height of summer, temperatures in San Diego can reach a maximum of 27℃ (80℉). The weather in the winter, especially around February, can reach a minimum of 8℃ (47℉).

If you want to get the most out of your time visiting San Diego, or you’re just afraid of the dark, the days in July are usually the longest between sunrise and sunset. On average it rains the most days in December, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.

Keep reading to find out more detailed information about the seasons and climate in San Diego, as well as our favourite tools to help you find the best options for transport, accommodation, and much more.

Warmest month

August

Least rainfall

June

Most daylight

July

San Diego seasons

Before you continue, it’s important to know when the seasons are in San Diego as they might be different to yours depending on where in the world you’re travelling from. San Diego is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in San Diego

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in San Diego for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

San Diego climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in San Diego for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

San Diego in January

  • Average temperature: 14℃ (58℉)
  • Average high temperature: 18℃ (64℉)
  • Average low temperature: 12℃ (53℉)
  • Average humidity: 60%
  • Average sunny days: 24 days
  • Average rainfall: 27mm (1") over 5 days
24 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to San Diego in January, make sure you pack a warm jacket or coat.


San Diego in February

  • Average temperature: 14℃ (57℉)
  • Average high temperature: 17℃ (63℉)
  • Average low temperature: 11℃ (52℉)
  • Average humidity: 64%
  • Average sunny days: 21 days
  • Average rainfall: 38mm (2") over 6 days
21 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to San Diego in February, make sure you pack a warm jacket or coat.


San Diego in March

  • Average temperature: 15℃ (58℉)
  • Average high temperature: 18℃ (65℉)
  • Average low temperature: 11℃ (53℉)
  • Average humidity: 68%
  • Average sunny days: 22 days
  • Average rainfall: 21mm (1") over 8 days
22 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to San Diego in March, make sure you pack a warm jacket or coat.


San Diego in April

  • Average temperature: 16℃ (60℉)
  • Average high temperature: 19℃ (66℉)
  • Average low temperature: 12℃ (54℉)
  • Average humidity: 69%
  • Average sunny days: 22 days
  • Average rainfall: 17mm (1") over 6 days
22 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to San Diego in April, make sure you pack a light jumper or hoodie.


San Diego in May

  • Average temperature: 17℃ (62℉)
  • Average high temperature: 20℃ (68℉)
  • Average low temperature: 14℃ (56℉)
  • Average humidity: 72%
  • Average sunny days: 21 days
  • Average rainfall: 10mm (0") over 6 days
21 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to San Diego in May, make sure you pack a light jumper or hoodie.


San Diego in June

  • Average temperature: 18℃ (64℉)
  • Average high temperature: 22℃ (71℉)
  • Average low temperature: 15℃ (59℉)
  • Average humidity: 74%
  • Average sunny days: 20 days
  • Average rainfall: 3mm (0") over 2 days
20 days
of pure sunshine
2 days
of showers or rain

What to pack: If you’re heading to San Diego in June, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


San Diego in July

  • Average temperature: 21℃ (69℉)
  • Average high temperature: 24℃ (75℉)
  • Average low temperature: 18℃ (64℉)
  • Average humidity: 72%
  • Average sunny days: 19 days
  • Average rainfall: 14mm (1") over 6 days
19 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to San Diego in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


San Diego in August

  • Average temperature: 22℃ (71℉)
  • Average high temperature: 25℃ (77℉)
  • Average low temperature: 19℃ (65℉)
  • Average humidity: 70%
  • Average sunny days: 22 days
  • Average rainfall: 10mm (0") over 3 days
22 days
of pure sunshine
3 days
of showers or rain

What to pack: If you’re heading to San Diego in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


San Diego in September

  • Average temperature: 21℃ (71℉)
  • Average high temperature: 25℃ (77℉)
  • Average low temperature: 18℃ (65℉)
  • Average humidity: 68%
  • Average sunny days: 22 days
  • Average rainfall: 10mm (0") over 5 days
22 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to San Diego in September, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.

San Diego in October

  • Average temperature: 20℃ (67℉)
  • Average high temperature: 23℃ (73℉)
  • Average low temperature: 17℃ (62℉)
  • Average humidity: 65%
  • Average sunny days: 24 days
  • Average rainfall: 8mm (0") over 3 days
24 days
of pure sunshine
3 days
of showers or rain

What to pack: If you’re heading to San Diego in October, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


San Diego in November

  • Average temperature: 17℃ (62℉)
  • Average high temperature: 21℃ (69℉)
  • Average low temperature: 14℃ (57℉)
  • Average humidity: 59%
  • Average sunny days: 24 days
  • Average rainfall: 22mm (1") over 5 days
24 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to San Diego in November, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


San Diego in December

  • Average temperature: 14℃ (57℉)
  • Average high temperature: 17℃ (63℉)
  • Average low temperature: 11℃ (53℉)
  • Average humidity: 62%
  • Average sunny days: 23 days
  • Average rainfall: 42mm (2") over 6 days
23 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to San Diego in December, make sure you pack a warm jacket or coat.


Top FAQs

The hottest month of the year in San Diego is usually August, where temperatures tend to rise to around 25℃ (77℉) in the middle of the day or early afternoon.
The month with the least amount of rain in San Diego is generally around June. The dry season often coincides with cooler weather, so you should check the temperatures in June first to make sure it’s still a good time to go.
The rainiest time of year in San Diego is generally around December, although the wetter season can sometimes extend a few months either side of December too.
If you want to get the most out of your time visiting San Diego, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

San Diego map