July weather forecast
Ishigaki, Japan

July exhibits peak summertime in Ishigaki. It features the year's highest average low temperature of 28.4°C (83.1°F), which equates to warm nights that seldom deviate from daytime heat. Despite representing the intensity of summer, the area witnesses rainfall that is in balance with previous months. Yet, visitors can enjoy an abundance of sunshine that averages just under the year's highest of 8.7 hours daily. July sees an increase in wind speed, providing a soothing contrast to the heat, while maintaining optimal conditions for water activities with the sea temperature at its peak.

Temperature

Peak temperatures are observed in July and August, averaging a high-temperature of 29.3°C (84.7°F).

Heat index

The heat index in July is appraised at a torrid 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. 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. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in July is 82%.

Rainfall

In Ishigaki, during July, the rain falls for 17.9 days and regularly aggregates up to 94mm (3.7") of precipitation. In Ishigaki, during the entire year, the rain falls for 228 days and collects up to 1184mm (46.61") of precipitation.

Sea temperature

The months with the warmest seawater are July through September, with an average sea temperature of 29°C (84.2°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

In July, the average length of the day is 13h and 29min.
On the first day of the month, sunrise is at 05:58 and sunset at 19:35. On the last day of July, sunrise is at 06:11 and sunset at 19:27 JST.

Sunshine

The average sunshine in July is 8.7h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Ishigaki, Japan. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In July, an average UV index of 7 transforms into the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.