August weather forecast
Merizo, GU

As one steps into August, it becomes clear that it is one of the highest rainfall months of the year. The month mirrors July's robust climate pattern with a consistently high temperature and relative humidity level. August witnesses a slight decline in sea temperature, from 85.4°F (29.7°C) to 85°F (29.4°C), consistent with the fluctuating tropical weather. Coupled with a decreased wind speed, it further showcases the unpredictable weather nature inherent to Merizo. Regardless of such fluctuations, the overall sea and weather conditions remain favorable for water activities.

Temperature

Merizo experiences peak temperatures, averaging a high-temperature of 84.7°F (29.3°C) during July and August.

Heat index

The heat index value during August is evaluated at a fiery hot 95°F (35°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

With an average relative humidity of 76%, August is the least humid month.

Rainfall

In Merizo, in August, it is raining for 28.9 days, with typically 9.76" (248mm) of accumulated precipitation. In Merizo, Guam, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

With an average ocean temperature of 85.5°F (29.7°C), August is the month with the warmest seawater.
Note: Surface water temperatures between 77°F (25°C) and 84.2°F (29°C) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

In August, the average length of the day is 12h and 34min.
On the first day of August, sunrise is at 6:06 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 6:33 pm ChST.

Sunshine

The average sunshine in August is 7.6h.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: In August, an average UV index of 7 transforms into the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.