June weather forecast
Kumejima, Japan

June, the first month of the summer in Kumejima, is also a moderately hot month, with an average temperature fluctuating between 29.3°C (84.7°F) and 24.7°C (76.5°F).

Temperature

With the arrival of June, Kumejima's average high-temperature registers at a still moderately hot 29.3°C (84.7°F), indicating a subtle variation from the previous month. June nighttime temperatures hover close to the daytime peak with an average of 24.7°C (76.5°F).

Heat index

For most parts of June, the heat index is appraised at a very hot 37°C (98.6°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

June is the most humid month, with an average relative humidity of 84%.

Rainfall

In Kumejima, Japan, in June, 264mm (10.39") of precipitation is typically accumulated. During the entire year, Kumejima aggregates up to 2112mm (83.15") of precipitation.

Daylight

With an average of 13h and 48min of daylight, June has the longest days of the year in Kumejima.
On the first day of June in Kumejima, Japan, sunrise is at 05:40 and sunset at 19:21. On the last day of the month, sunrise is at 05:43 and sunset at 19:29 JST.

Sunshine

In Kumejima, the average sunshine in June is 5.4h.