Our verdict
The best time to visit San Diego is November
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.
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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:
| Season | Months |
|---|---|
| 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:
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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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