UV Index in Hofu, Japan

Last updated: May 3, 2025

In Hofu, Japan, awareness of the UV Index is crucial for protecting skin health and preventing sunburn. With a Cfa climate that brings warm summers and increased sunlight, understanding daily UV levels helps residents and visitors take necessary precautions for outdoor activities. Notably, during peak hours, especially from 11:00 AM to 1:00 PM, the UV Index can soar to a staggering 11, indicating a very high risk of harm from unprotected sun exposure. Staying informed about these levels is key to enjoying Hofu’s beautiful outdoors safely while safeguarding your skin from potential damage.

Hourly UV Index in Hofu

The UV Index paints a vivid picture of the sun's intensity throughout the day. Starting with a gentle 2 at 7:00 AM, the index climbs steadily, reaching 3 by 8:00 AM. As the sun rises higher, it peaks at an impressive 11 at noon, signaling a time when sun protection is crucial. The index begins to taper off in the afternoon, with readings of 10 at 1:00 PM and 8 at 2:00 PM, before gradually decreasing to 6 at 3:00 PM. By late afternoon, the UV Index returns to a more moderate 3 at 4:00 PM, and continues to decline, settling at 1 by 6:00 PM. It’s clear that the midday sun demands respect, making awareness of UV levels essential for outdoor safety.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	2	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Hofu

Throughout the year, UV Index levels exhibit significant seasonal variation, with the highest risks occurring in the spring and summer months. From March to August, the UV Index reaches extreme levels, peaking at 12 in July and August, where the recommended burn time is just 10 minutes. The months of April and May also maintain an extreme UV Index of 11. Conversely, during January and December, UV exposure is at a moderate level with a UV Index of 4, allowing for a burn time of 30 minutes. For residents and visitors, it is crucial to be particularly cautious from March through September, taking protective measures like wearing sunscreen, protective clothing, and limiting sun exposure during peak hours. Remain vigilant and prioritize skin safety, especially during the high-risk months of April through August.

Monthly Maximum UV Index for Hofu, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Hofu. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Hofu, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Hofu UV Index with Other Japan Cities

The table above highlights how UV exposure in Hofu compares to other major locations across Japan. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Hofu's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sapporo UVI	2	3	6	7	9	9	9	10	8	5	3	2
Yokohama UVI	3	5	8	9	11	11	11	11	10	7	5	4
Tokyo UVI	3	5	8	9	11	11	11	11	10	7	5	4
Nagoya UVI	4	6	8	10	11	11	11	11	10	7	5	3
Osaka UVI	4	6	8	11	11	11	12	11	10	7	5	3
Hofu	4	5	8	11	11	11	12	12	10	7	6	4