October weather forecast
Hagåtña, GU

As October sets in, the pace starts to gently slow down in Hagåtña. The tropical comfort persists and the showers diminish, allowing more opportunities for outdoor activities and exploration. Despite the intermittent downpours, scoring 8.46" (215mm) of rainfall over 28.7 days, the overall atmosphere remains exhilarating. Against the backdrop of the lush green landscape, October is an ideal time to experience Hagåtña's striking blend of history, culture, and nature.

Temperature

The average high-temperature in October, at a still warm 84.4°F (29.1°C), mirrors September's climate. Hagåtña experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 82.6°F (28.1°C) throughout October.

Heat index

In October, the average heat index is appraised at a very hot 95°F (35°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%.

Rainfall

In Hagåtña, in October, it is raining for 28.7 days, with typically 8.46" (215mm) 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

In October, the average ocean temperature in Hagåtña is 85.1°F (29.5°C).
Note: For engaging in water activities including swimming and diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are perceived as perfect, providing pleasure for extended durations.

Daylight

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

Sunshine

In October, the average sunshine is 6.9h.

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 of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 in October translates into these instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Attention! The combination of sand and water reflections enhances UV ray intensity.