October weather forecast
Inarajan, GU

In October, Inarajan, Guam, witnesses a gradual reduction in temperature and rainfall from September. Conditions across the island begin to marginally cool off, signaling the onset of autumn. Sea temperatures start to recede, although they stay warm enough for beach visits and water sports. The reduction in rainfall to 8.46" (215mm) offers a higher chance for tourists to enjoy the landscape without disturbance. The weather this month offers a snapshot into Guam's stunning autumn, characterized by clearer skies contrasted with tropical warmth.

Temperature

Inarajan records a high-temperature average of a still warm 84.4°F (29.1°C) in October, showing no difference from September. October nights witness a mild cool down to an average low of 82.6°F (28.1°C).

Heat index

In October, the average heat index is evaluated at a fiery hot 95°F (35°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

January, March through May, October through December, with an average relative humidity of 78%, are the most humid months in Inarajan.

Rainfall

In October, in Inarajan, the rain falls for 28.7 days. Throughout October, 8.46" (215mm) of precipitation is accumulated. In Inarajan, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Inarajan, Guam, the average seawater temperature in October is 85.1°F (29.5°C).
Note: Swimming, diving, and other water-related activities in temperatures between 77°F (25°C) and 84.2°F (29°C) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

The average length of the day in October is 11h and 50min.
On the first day of October in Inarajan, sunrise is at 6:10 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 5:54 pm ChST.

Sunshine

In Inarajan, the average sunshine in October is 6.9h.

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 estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In October, the maximum UV index of 7 suggests these recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Notice! The Sun's UV exposure elevates with sand and water reflections.