Year-round weather and climate in San Diego, United States
Average temperatures in San Diego run from an average low of 8°C46°F in January up to an average high of 25°C77°F in August. July is the driest month at 0 rainy days; March the wettest at 11. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 1.4M
- Currency
- USD
- Language
- English
- Time zone
- Los Angeles
Best time to visit
The most pleasant weather falls in July, August, and September, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Tropical Downpours: Expect intense bursts of rain during wetter months. Pack quick-drying footwear and a compact umbrella.
Day-to-night swing
Evening Chill: Temperatures drop by a noticeable 11°C20°F when the sun goes down. A light sweater or jacket is usually all you need for evening plans.
Seasonality Profile
Mediterranean: Hot, bone-dry summers giving way to mild, occasionally wet winters.
Evening vibe
Outdoor Haven: With over half the year supporting mild evenings, open-air dining and rooftop bars are the norm. Pack smart-casual, breathable evening wear.
Sightseeing stamina
All-Day Strolling: Weather is generally forgiving for long walking days. Comfortable sneakers are your most important packing item.
Average temperatures, sunshine, and rainfall
Average monthly weather in San Diego, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Jul is typically driest at 0 days (0mm); Mar the wettest at 11 days (119mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 17°C / 62°F | 8°C / 47°F | 8h | 10 | 139mm |
| Feb | 16°C / 61°F | 8°C / 47°F | 8h | 9 | 111mm |
| Mar | 16°C / 61°F | 9°C / 49°F | 9h | 11 | 119mm |
| Apr | 18°C / 65°F | 11°C / 52°F | 11h | 3 | 8mm |
| May | 19°C / 67°F | 14°C / 57°F | 11h | 2 | 6mm |
| Jun | 21°C / 71°F | 16°C / 60°F | 11h | 1 | 3mm |
| Jul | 24°C / 76°F | 18°C / 64°F | 12h | 0 | 0mm |
| Aug | 25°C / 78°F | 18°C / 65°F | 11h | 1 | 21mm |
| Sep | 24°C / 76°F | 18°C / 64°F | 10h | 1 | 8mm |
| Oct | 24°C / 75°F | 14°C / 58°F | 10h | 2 | 3mm |
| Nov | 21°C / 70°F | 10°C / 51°F | 9h | 4 | 30mm |
| Dec | 19°C / 66°F | 9°C / 49°F | 9h | 2 | 25mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit San Diego?
The most sunshine in San Diego comes around July, averaging 12 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for San Diego?
Your packing list depends entirely on when you travel. Temperatures in San Diego swing from an average low of 8°C46°F in January up to 25°C77°F in August. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for San Diego?
San Diego gets rain on about 46 days out of the year. The wettest month is March. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in San Diego with Packola.
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