June weather forecast
Haikou, China

June offers the first spectacle of summer's apex, with temperatures peaking close to 32.9°C (91.2°F). It distinguishes itself from May by offering slightly warmer peaks. While rainfall continues to shower down consistently, the increased hours of daylight allow for more sun-soaked outdoor activities. June begins the transition into the hottest part of the year, setting the stage for an even warmer July.

Temperature

Haikou, China, observes an average high-temperature of a still tropical 32.9°C (91.2°F) in June, barely different from 31.9°C (89.4°F) in May. Haikou records an average low of 25.5°C (77.9°F) throughout the nights in June.

Heat index

June's mean heat index is calculated to be a life-threatening hot 49°C (120.2°F). Guard: Heat exhaustion and heat cramps are foreseeable. Prolonged effort may bring about heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

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

Rainfall

In June, in Haikou, the rain falls for 16 days. Throughout June, 227mm (8.94") of precipitation is accumulated. Throughout the year, in Haikou, there are 145 rainfall days, and 1652mm (65.04") of precipitation is accumulated.

Sea temperature

In Haikou, in June, the average water temperature is 28.7°C (83.7°F).
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

With an average of 13h and 18min of daylight, June has the longest days of the year in Haikou, China.
On the first day of the month, sunrise is at 05:59 and sunset at 19:15. On the last day of June, sunrise is at 06:03 and sunset at 19:22 CST.

Sunshine

In Haikou, the average sunshine in June is 7.4h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Haikou, China. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 12 in June transforms into this advice:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. 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. 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. Even on overcast days, ensure the application and frequent reapplication of sunscreen with at least an SPF 30, especially post swim or outdoor exercise. Stay aware! UV radiation is magnified when reflecting off sand and water.