UV Index in Hojo, Japan

Last updated: June 2, 2025

In Hojo, Japan, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels helps in the prevention of sunburns and long-term skin damage, ensuring your outdoor activities remain safe and enjoyable. With a Cfa climate, Hojo experiences significant sun intensity, particularly during midday hours when the UV Index peaks at 11. By knowing when to seek shade or apply sunscreen, you can safeguard your health while soaking up the vibrant beauty of this coastal town.

Hourly UV Index in Hojo

As the sun rises, the UV Index starts at a manageable 2 at 7:00 AM, making for a gentle beginning. By 8:00 AM, it climbs to 4, signaling the need for some sun protection. The real intensity hits at 10:00 AM, peaking at an eye-catching 11 by noon, where precautions become essential. The afternoon sees the index holding steady at 11 until 1:00 PM, before gradually dropping to 9 at 2:00 PM and then tapering off. By late afternoon, the UV Index returns to a safe 2 by 5:00 PM, and settles down to a low 1 by 6:00 PM, making the evening hours perfect for outdoor activities without the worry of excessive sun exposure. Be mindful of the midday sun when planning outdoor adventures!

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.
TimeUVICategoryTime to Burn
07:002low45 min
08:004moderate30 min
09:006high25 min
10:009very high15 min
11:0010very high15 min
12:0011extreme10 min
13:0011extreme10 min
14:009very high15 min
15:006high25 min
16:004moderate30 min
17:002low45 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Hojo

The UV Index experiences significant seasonal fluctuations, peaking between May and August, where an extreme rating of 11 to 12 indicates a burn time of just 10 minutes. March and April also see heightened levels, categorized as very high with a burn time of 15 minutes. Conversely, the UV Index is at its lowest during January, February, and December, marked as moderate, allowing for a safer 30-minute exposure before risking sunburn. The highest-risk months for UV exposure are May to August, necessitating strong sun protection measures for visitors and residents alike. It is essential to wear sunscreen, protective clothing, and sunglasses, especially during peak hours, to minimize the risk of UV-related health issues.

Monthly Maximum UV Index for Hojo, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Hojo. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121210764
Data source: Statistical UV Index data for Hojo, 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 Hojo UV Index with Other Japan Cities

The table above highlights how UV exposure in Hojo 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.
Hojo's solar exposure compared to other cities in Japan. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Sapporo UVI2367999108532
Yokohama UVI35891111111110754
Tokyo UVI35891111111110754
Nagoya UVI468101111111110753
Osaka UVI468111111121110753
Hojo458101111121210764