Weather24UV index San Diego today: right now and hour by hour
UV index in San Diego right now: 0 — the sun isn't up yet. Today it is forecast to peak at 5.1 (moderate) around 12 PM. Today the UV index in San Diego is 3 or higher from 10 AM to 3 PM — the hours when the WHO recommends sun protection.
In the Weather24 app
When does UV peak where you are?
The UV index card with today's peak, hour by hour, and a line that says whether you need protection right now.
UV index in San Diego: today and tomorrow · Max today 5.1
Each bar is one hour, in WHO colors. The thin line shows the UV index under a clear sky — clouds bring the real value below it. Hourly values from a weather model, local time; updated every hour.
UV index in San Diego by month: about 9 in June, 5 in November
In San Diego the typical daily UV maximum stays at 3 or more all year: about 5 in November, up to about 9 in June.
Typical daily UV maximum for each month: the median of hourly model values over the last three years (Nov 2023 – Oct 2026, Open-Meteo). Sunny days run higher, overcast days lower.
Sun in San Diego today: 10 h 45 min of daylight
The UV index is highest around solar noon, when the sun is at its highest — in San Diego today around 11:32. The day is 10 h 45 min long; at the June solstice it lasts 14 h 18 min, at the December solstice 10 h 0 min.
UV index in the Weather24 app
On the Today screen the UV index card shows today's maximum and its level. Tap it for UV hour by hour with the peak and a line that says whether you need protection right now. UV is also in the rows under the hourly forecast — for your location and every saved city.
Frequently asked questions
What is the UV index today in San Diego?
What time is the UV index highest in San Diego?
What is the UV index tomorrow in San Diego?
When does the UV index go above 3 in San Diego?
Where does the data come from?
UV index in other cities
See also: UV index scale: what each level means · barometric pressure today · rain radar