Best Time to Visit San Diego
San Diego is best visited All year, when the weather is mild, drier and comfortable for sightseeing.
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Average daily high and low temperatures (°C/°F). Bars show the daily range each month.
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| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January Best | 17.3°C | 8.3°C | 64.6mm | 8.7h | 6 | 10/10 |
| February Best | 18.1°C | 8.0°C | 30.5mm | 9.4h | 4 | 10/10 |
| March Best | 17.2°C | 9.7°C | 81.3mm | 9.8h | 10 | 10/10 |
| April Best | 19.2°C | 12.2°C | 30.3mm | 10.5h | 3 | 10/10 |
| May Best | 20.3°C | 14.3°C | 5.3mm | 10.9h | 2 | 10/10 |
| June Best | 22.1°C | 16.0°C | 3.5mm | 11.7h | 1 | 10/10 |
| July Best | 24.1°C | 18.1°C | 6.1mm | 12.2h | 0 | 10/10 |
| August Best | 25.5°C | 19.1°C | 11.2mm | 11.5h | 1 | 10/10 |
| September Best | 25.6°C | 18.3°C | 17.5mm | 10.5h | 1 | 10/10 |
| October Best | 23.9°C | 15.2°C | 8.8mm | 9.6h | 3 | 10/10 |
| November Best | 21.1°C | 10.8°C | 26.8mm | 9.4h | 3 | 10/10 |
| December Best | 17.9°C | 8.9°C | 44.4mm | 8.0h | 6 | 10/10 |
San Diego Climate
San Diego has a semi arid climate — warm and dry with low but seasonal rainfall. Check the annual climate overview for San Diego for the full year picture.
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Frequently Asked Questions
What is the best month to visit San Diego?
The best month to visit San Diego is January, when temperatures average 17.3°C and conditions score 10/10 for comfort.
What is the weather like in San Diego in January?
San Diego in January is pleasantly mild — daytime temperatures average 17.3°C, dropping to 8.3°C at night. The month is moderately rainy (6 rainy days), with roughly 8.7 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal.
When is rainy season in San Diego?
San Diego does not have a distinct rainy season — rainfall is spread relatively evenly through the year.
Is San Diego good to visit in winter?
Yes — winter (December, January, February) averages 17.3°C highs with a 10/10 comfort rating, making it a solid time to visit.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.