Kosai, Shizuoka
Low1.9
UV Index · Now
Step out.
You can step out without sun protection.
Unprotected
1 hr 48 min
until skin starts to burn.
With SPF 30
54 hr 3 min
Average unprotected skin. Lighter skin burns faster, darker skin slower.
HeatComfortable
Air
18°
Feels like
18°
Humidity
61%
Questions about Kosai today
- What is the UV index in Kosai right now?
- The UV index in Kosai, Shizuoka is 1.9 — categorised as Low. You can step out without sun protection.
- Is it safe to go outside in Kosai today?
- Yes — UV is low (1.9) in Kosai right now. You can step out without sun protection.
- How long does it take to get sunburn in Kosai?
- Average unprotected skin starts to burn in roughly 1 hr 48 min at the current UV index of 1.9 in Kosai. SPF 30 multiplies that window by about 30×. Lighter skin burns faster; darker skin burns more slowly.
- What does the heat feel like in Kosai today?
- Air temperature is 18°C with 61% humidity, giving a "feels like" reading of 18°C — comfortable.
- When is the safest time to step outside in Kosai?
- 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 Kosai, especially through summer.