Nagano, Nagano
Moderate4.0
UV Index · Now
Hat & SPF.
A hat and SPF 30 are enough for most people.
Unprotected
50 min
until skin starts to burn.
With SPF 30
25 hr
Average unprotected skin. Lighter skin burns faster, darker skin slower.
HeatComfortable
Air
15°
Feels like
15°
Humidity
58%
Questions about Nagano today
- What is the UV index in Nagano right now?
- The UV index in Nagano, Nagano is 4.0 — categorised as Moderate. A hat and SPF 30 are enough for most people.
- Is it safe to go outside in Nagano today?
- Yes — UV is moderate (4.0) in Nagano right now. A hat and SPF 30 are enough for most people.
- How long does it take to get sunburn in Nagano?
- Average unprotected skin starts to burn in roughly 50 min at the current UV index of 4.0 in Nagano. SPF 30 multiplies that window by about 30×. Lighter skin burns faster; darker skin burns more slowly.
- What does the heat feel like in Nagano today?
- Air temperature is 15°C with 58% humidity, giving a "feels like" reading of 15°C — comfortable.
- When is the safest time to step outside in Nagano?
- UV is highest between 11 am and 4 pm. Early mornings (before 9 am) and late afternoons (after 5 pm) are the safest windows for unprotected skin in Nagano, especially through summer.