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UV Index in Hagåtña, GU

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Today's UV index in Hagåtña, Guam Guam will be up to 12.7, indicating extreme risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

UV index at 12.7 in Hagåtña means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.

Hagåtña Weather

Read more here about the climate and sun exposure in and around Hagåtña.

UV Index in Hagåtña

The UV index in Hagåtña, Guam, can reach high levels due to its proximity to the equator. During the summer months, the UV index can range from 10 to 12, which is considered extremely high. It is crucial to take appropriate precautions like using sunscreen, wearing hats and sunglasses, and seeking shade during peak sun hours to protect your skin from harmful UV radiation.

Weather Seasons

UV index

Hagåtña experiences two main seasons - a dry season and a wet season. The dry season typically lasts from December to June, characterized by lower levels of rainfall and higher temperatures. During this time, temperatures can reach an average high of 31 °C (88 °F) and a low of 24 °C (75 °F). The wet season, from July to November, brings increased rainfall and the possibility of tropical storms or typhoons. Temperatures during this season tend to be slightly lower with an average high of 29 °C (84 °F) and a low of 23 °C (73 °F).

Hagåtña's Climate

Compared to other regions, Hagåtña in Guam experiences a tropical climate with high humidity and frequent rainfall. This climate is typical of the Pacific islands in the region. Due to its location near the equator, Hagåtña receives a significant amount of sunshine throughout the year, making it ideal for sunbathing and outdoor activities. However, it is essential to be aware of the intense UV radiation that comes with the sun exposure in this region and take necessary precautions to prevent skin damage.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Hagåtña. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in Hagåtña (Guam) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.