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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Norwich Wire weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above for San Diego’s current temperature and conditions – expect a range of 16–21°C (61–70°F) today, typical of the city’s mild Mediterranean climate.
What is San Diego’s weather like today?
San Diego sees mostly sunny skies with a gentle sea breeze, humidity around 65–75% and a UV index of 6–7 (high) during midday. The live forecast above shows no significant rain – common for this time of year.
San Diego weather by month – a year-round view
San Diego weather year-round stays comfortable: January averages 14°C (57°F), July 22°C (72°F). The warmest period runs June–September with highs of 24–27°C (75–81°F). Rainfall is minimal from May to October; the wettest months are December–March, with around 5–7cm per month.
San Diego weather in Fahrenheit and Celsius
San Diego weather fahrenheit readings typically sit between 57°F and 81°F year-round. For Celsius, that’s 14–27°C. The live forecast above displays both scales; toggle to view your preference.
Extended outlook: 10, 14 and 15 day forecasts
Weather in san diego 10 days ahead shows little change – highs around 21–24°C (70–75°F), lows 16–18°C (61–64°F). For weather in san diego 14 days or san diego weather 15 day, expect similar consistency, typical of the region. For hourly detail, check the san diego weather hourly panel in the live forecast above.
What is the best time to visit San Diego for nice weather?
Late spring (April–June) and early autumn (September–October) offer the most comfortable conditions: 20–24°C (68–75°F), low humidity and little rain. Summer can be warmer but still pleasant.
Does San Diego get much rain?
San Diego averages only 25–30cm of rain per year, mostly from December to March. The dry season from May to October sees virtually no rainfall – perfect for outdoor plans.
How does San Diego weather compare to the UK?
San Diego is far warmer and drier than most UK cities like Birmingham, Glasgow or Bristol. While the UK averages 60–80cm of rain annually, San Diego receives under 30cm and enjoys over 260 sunny days per year.
For more UK weather comparisons, see our UK weather hub or check the 10 day weather forecast UK. You can also explore other cities like Birmingham Weather, Liverpool Weather or Bristol Weather.