August weather forecast
Hagåtña, GU

August rolls in promising hot days, but Hagåtña, Guam offers a pleasant surprise with its moderate tropical climate. Brace for generous rain showers, as this month sees the highest rainfall of the year, amounting to a staggering 9.76" (248mm) over 28.9 days. The city continues to teem with vibrant cultural events and breathtaking natural vistas that never fail to captivate the visiting population.

Temperature

Hagåtña sees the highest average temperatures during the months of July and August, peaking at 84.7°F (29.3°C).

Heat index

August's mean heat index is computed to be a fiery hot 95°F (35°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
In reference to the heat index, it's for places in shade and with a slight wind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

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

Rainfall

In Hagåtña, in August, it is raining for 28.9 days, with typically 9.76" (248mm) of accumulated precipitation. In Hagåtña, 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: Swimming, diving, and other activities in water temperatures between 77°F (25°C) and 84.2°F (29°C) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

The average length of the day in August is 12h and 34min.
On the first day of August in Hagåtña, sunrise is at 6:05 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

In Hagåtña, 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 in Hagåtña. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: During August, 7 as the daily maximum UV index converts into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Heads up! UV intensity is amplified by reflections from water and sand.