UV Index in Koga, Fukuoka, Japan

· Asia/Tokyo

5.2
Moderate · clear-sky maximum Wednesday, October 21, 2026

At solar noon (12:02:48 PM) the sun reaches 45.6° above the horizon in Koga. Without clouds, that corresponds to a maximum UV index of about 5.2 (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 Koga, next 14 days

DateSun at noonClear-sky maxForecast max
45.6° 5.2 Moderate —
45.3° 5.1 Moderate —
44.9° 5.0 Moderate —
44.6° 5.0 Moderate —
44.2° 4.9 Moderate —
43.9° 4.8 Moderate —
43.5° 4.7 Moderate —
43.2° 4.7 Moderate —
42.9° 4.6 Moderate —
42.5° 4.5 Moderate —
42.2° 4.5 Moderate —
41.9° 4.4 Moderate —
41.6° 4.3 Moderate —
41.3° 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 Koga 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 Koga or discover the best light for photos during the golden hour in Koga.

About Koga

Located in Japan’s Fukuoka Prefecture, Koga covers an area of 42.1 square kilometers. The city has existed as a municipality since 1997 and recorded a population of 59,349 in 2020. The local infrastructure includes several transport hubs, such as Koga Station, which is an over-track railway station, alongside the passenger railway stations Chidori Station and Shishibu Station. Education is represented in the area by the Fukuoka Jo Gakuin Nursing College. The site of the former Nishitetsu-Koga Station is also located within city limits.

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