October weather forecast
Piti, GU

In October, Piti residents and visitors experience a slight cool down in comparison to September with temperatures falling gently. Though temperatures remain pleasant, there is a significant decrease in rainfall from September to October. Heading into November, there is a promise of lesser rain and the slow but sure advent of cooler weather. October's standout is undeniably the significant drop in average rainfall amounting to 8.46" (215mm).

Temperature

October's arrival yields an average high-temperature of a still moderately hot 84.4°F (29.1°C), mirroring that of September. Piti encounters an average temperature dip to a still moderately hot 82.6°F (28.1°C) throughout October, subtly lower than its daytime maximum.

Heat index

For October, the heat index is appraised at a sweltering 95°F (35°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. 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 especially vital to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

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

Rainfall

In October, the rain falls for 28.7 days. Throughout October, 8.46" (215mm) of precipitation is accumulated. Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Ocean temperature

In Piti, in October, the average water temperature is 85.1°F (29.5°C).
Note: Ideal surface water temperatures for any water activity fall between 77°F (25°C) and 84.2°F (29°C), offering maximum enjoyment for lengthened periods.

Daylight

The average length of the day in October is 11h and 50min.
On the first day of the month, sunrise is at 6:10 am and sunset at 6:11 pm. On the last day of October, sunrise is at 6:15 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 value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 7 in October translates into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Watch out! Reflections from sand and water can surge UV radiation exposure.