UV Index in Karatsu, Saga, Japan

· Asia/Tokyo

5.3
Moderate · clear-sky maximum Wednesday, October 21, 2026

At solar noon (12:04:47 PM) the sun reaches 45.9° above the horizon in Karatsu. Without clouds, that corresponds to a maximum UV index of about 5.3 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.

☀️ Sun Safety: When the UV index is high, protect yourself with sunscreen, shade, and a hat. Values of 6 or more indicate increased sunburn risk!

UV index in Karatsu, next 14 days

DateSun at noonClear-sky maxForecast max
45.9° 5.3 Moderate —
45.6° 5.2 Moderate —
45.2° 5.1 Moderate —
44.8° 5.0 Moderate —
44.5° 5.0 Moderate —
44.2° 4.9 Moderate —
43.8° 4.8 Moderate —
43.5° 4.7 Moderate —
43.2° 4.7 Moderate —
42.8° 4.6 Moderate —
42.5° 4.5 Moderate —
42.2° 4.5 Moderate —
41.9° 4.4 Moderate —
41.5° 4.3 Moderate —

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.

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The UV index in Karatsu measures the intensity of ultraviolet radiation reaching the ground. Values below 3 are considered low risk, while 6 and above require sun protection such as sunscreen, sunglasses, and shade. The clear-sky value shows how strong the sun can get on each day; the forecast shows what is expected with clouds. See today's sunrise and sunset times for Karatsu or discover the best light for photos during the golden hour in Karatsu.

About Karatsu

Karatsu is a city in Saga Prefecture, Japan, with a population of 116,052 as of 2021. The municipality has existed in its current form since 2005 and covers an area of 487.6 square kilometres. Transportation options include Karatsu Station, Hizen-Kubo Station, and Honmutabe Station. The city also maintains a twin town relationship with Yeosu. Geographically, the area is situated along the Genkai Sea and the Matsuura River. Among the notable features located within the city limits are the Japanese castles of Nagoya Castle and Karatsu Castle.

AI-assisted description based on geographic data and editorial notes.