August weather forecast
Umatac, GU

Come August, Umatac, Guam endures its wettest episode with rainfall peaking at a high of 9.76" (248mm), slightly above what is recorded in July. The high rainfall makes this month a prominent part of the rainy season. However, the city's climate offsets the high precipitation with decreased wind speed. The cloud cover adds an element of serenity to the weather story of the month. Concurrently, the UV index remains steady, advocating for continual sun safety measures.

Temperature

July and August, when the average high-temperature reaches 84.7°F (29.3°C), are the warmest months.

Heat index

During August, the heat index is estimated at a sweltering 95°F (35°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The least humid month is August, with an average relative humidity of 76%.

Rainfall

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

Daylight

In Umatac, the average length of the day in August is 12h and 34min.
On the first day of the month, sunrise is at 6:06 am and sunset at 6:48 pm. On the last day of August, 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 estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high daily UV index of 7 during August translates into the following directions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.