At solar noon (11:22:38 AM) the sun reaches 36.4° above the horizon in Iwanai. Without clouds, that corresponds to a maximum UV index of about 3.1 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.
UV index in Iwanai, next 14 days
| Date | Sun at noon | Clear-sky max | Forecast max |
|---|---|---|---|
| 36.4° | 3.1 Moderate | — | |
| 36.0° | 3.0 Moderate | — | |
| 35.7° | 3.0 Moderate | — | |
| 35.3° | 2.9 Low | — | |
| 35.0° | 2.9 Low | — | |
| 34.6° | 2.8 Low | — | |
| 34.3° | 2.7 Low | — | |
| 34.0° | 2.7 Low | — | |
| 33.6° | 2.6 Low | — | |
| 33.3° | 2.6 Low | — | |
| 33.0° | 2.5 Low | — | |
| 32.7° | 2.5 Low | — | |
| 32.3° | 2.4 Low | — | |
| 32.0° | 2.4 Low | — |
Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.
High UV today? Sport sunscreen with SPF 100 stays on through sweat — essential for long outdoor activities.
View on Amazon →About Iwanai
Iwanai is a town located in the Iwanai district of Hokkaidō, Japan. It occupies an area of 70.6 square kilometres along the coast of the Sea of Japan and has existed as a municipality since 1955. As of 2020, the population was 11,982. The local geography is marked by Mount Iwanai, while Iwanai Port serves as a regional port facility. The town also contains the Iwanai Shrine. Official administrative ties are maintained with the twin towns of Jōetsu-shi and Fukaura.
AI-assisted description based on geographic data and editorial notes.