October weather forecast
Haikou, China

October acknowledges the retreat of summer and the arrival of the more temperate Fall season. The temperatures drop more noticeably from the September highs, and rainfall starts to recede. Outdoor enthusiasts can begin to enjoy the changing scenery as the city transitions towards a milder and less humid climate, celebrating the coming end of the year.

Temperature

The arrival of October in Haikou sees a recorded average high-temperature of a warm 28.4°C (83.1°F), showing little divergence from the previous month's conditions. The average nighttime temperature lowers to a pleasant 22.9°C (73.2°F) throughout October.

Heat index

The average heat index in October is calculated to be a tropical 34°C (93.2°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. 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 'feels like' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Haikou, the average relative humidity in October is 83%.

Rainfall

In October, in Haikou, the rain falls for 12.5 days. Throughout October, 224mm (8.82") of precipitation is accumulated. In Haikou, during the entire year, the rain falls for 145 days and collects up to 1652mm (65.04") of precipitation.

Sea temperature

In Haikou, China, the average seawater temperature in October is 26.8°C (80.2°F).
Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is seen as very warm and delightful by everyone. During these temperatures, water activities become enjoyable, without causing discomfort for extended periods.

Daylight

In October, the average length of the day is 11h and 41min.
On the first day of October in Haikou, sunrise is at 06:30 and sunset at 18:27. On the last day of the month, sunrise is at 06:40 and sunset at 18:05 CST.

Sunshine

In Haikou, the average sunshine in October is 5.7h.

UV index

In Haikou, the average daily maximum UV index in October is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 10 in October translates into this advice:
Protection should always be a priority. Skin and eyes are vulnerable without it. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Even when the sky is cloudy, apply generously and frequently reapply a sunscreen with SPF 30 or more, especially post every swim or outdoor exercise. Stay cautious! Sand and water reflections increase UV radiation potency.