Weather24UV index Seattle today: right now and hour by hour
UV index in Seattle right now: 0 — the sun isn't up yet. Today it is forecast to peak at 2.2 (low) around 1 PM. Today the UV index in Seattle stays below 3 all day — on the WHO scale, no sun protection is needed.
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 Seattle: today and tomorrow · Max today 2.2
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 Seattle by month: about 7 in July, 2 in November
In November the typical daily UV maximum in Seattle is only about 2, in the low range. It usually reaches 3 again in March and peaks at about 7 in July.
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 Seattle today: 9 h 46 min of daylight
The UV index is highest around solar noon, when the sun is at its highest — in Seattle today around 11:52. The day is 9 h 46 min long; at the June solstice it lasts 15 h 59 min, at the December solstice 8 h 25 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 Seattle?
What time is the UV index highest in Seattle?
What is the UV index tomorrow in Seattle?
When does the UV index go above 3 in Seattle?
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