June weather forecast
Hagåtña, GU

As the rest of the world embraces summer, Hagåtña, Guam retains its characteristic tropical environment into June. Visitors can relish the balmy weather while exploring the city's cultural attractions and natural landmarks. Downpours become slightly more frequent, culminating in an accumulated rainfall of 3.7" (94mm) across a spread of 25.4 days. Despite this, the city exudes a jovial atmosphere- celebrating life, culture, history, and the joy of cohabiting with nature.

Temperature

June's average high-temperature in Hagåtña is a still moderately hot 84.6°F (29.2°C), maintaining a close comparison with May's 84.2°F (29°C). Hagåtña sustains a near constant temperature throughout June, with nighttime averages of 83.3°F (28.5°C).

Heat index

Throughout June, the heat index is computed to be a very hot 95°F (35°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In Hagåtña, the average relative humidity in June is 77%.

Rainfall

In Hagåtña, in June, during 25.4 rainfall days, 3.7" (94mm) of precipitation is typically accumulated. In Hagåtña, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Hagåtña, the average seawater temperature in June is 84.7°F (29.3°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

June has the longest days of the year in Hagåtña, Guam, with an average of 12h and 54min of daylight.
On the first day of the month, sunrise is at 5:52 am and sunset at 6:44 pm. On the last day of June, sunrise is at 5:57 am and sunset at 6:52 pm ChST.

Sunshine

June has the most sunshine of the year in Hagåtña, with an average of 10.6h of sunshine.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in June converts into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely. Caution! The Sun's UV intensity grows with reflections off sand and water.