UV Index in Shizuoka, Japan

Last updated: July 2, 2025

Understanding the UV Index in Shizuoka, Japan is crucial for protecting your skin and maintaining overall health in a region known for its warm Cfa climate. With UV levels peaking at 12 around midday, awareness of these rates can significantly aid in sunburn prevention and reducing long-term skin damage. Shizuoka's sunny afternoons bring elevated UV exposure risks, making it vital for residents and visitors alike to monitor the UV Index regularly. By staying informed, you can enjoy the beautiful landscapes while safeguarding your skin from harmful rays.

Hourly UV Index in Shizuoka

The UV Index starts off gently at 07:00 with a reading of 2. However, as the sun rises higher, it peaks between 11:00 and 12:00, hitting a striking 12, indicating the need for sun protection during these hours. Concentrate your outdoor activities around 09:00, with an index of 8, or quickly wrap things up by 14:00, when it dips back to 8. As the day winds down, the index decreases significantly, dropping to 3 at 16:00 and fading to a safe 0 by 19:00. To stay safe under the sun, plan your exposure wisely around these hourly changes!

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	5	moderate	30 min
09:00	8	very high	15 min
10:00	10	very high	15 min
11:00	12	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 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	0	low	45 min

Monthly UV Index Trends in Shizuoka

Throughout the year, the UV Index demonstrates notable seasonal changes, with the most intense exposure occurring from April to August. During these months, the UV Index reaches extreme levels (10-12), significantly reducing the burn time to just 10 minutes. March and September also pose risks with very high levels (8-10), allowing for a burn time of only 15 minutes. Consequently, February and October present high levels (6-7), where protective measures are still advised with adjusted burn times of 25 minutes. Residents and visitors should exercise caution and protect their skin, especially during the high-risk months of April through August, by using sunscreen, wearing protective clothing, and limiting sun exposure during peak hours.

Monthly Maximum UV Index for Shizuoka, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Shizuoka. 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 Shizuoka, 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 Shizuoka UV Index with Other Japan Cities

The table above highlights how UV exposure in Shizuoka 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.

Shizuoka'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
Shizuoka	4	6	8	10	11	11	12	11	10	7	5	4