September weather forecast
Ciwandan, Indonesia

September, the first month of the spring in Ciwandan, is also a hot month, with an average temperature ranging between max 31.3°C (88.3°F) and min 25°C (77°F).

Temperature

Ciwandan's average high-temperature in September is a still hot 31.3°C (88.3°F), indicating a subtle variation from August. During September, the average low-temperature is a moderately hot 25°C (77°F).

Heat index

The heat index in September is estimated at a torrid 39°C (102.2°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

September and October, with an average relative humidity of 71%, are the least humid months.

Rainfall

In Ciwandan, in September, during 13.3 rainfall days, 31mm (1.22") of precipitation is typically accumulated. Throughout the year, there are 273 rainfall days, and 1266mm (49.84") of precipitation is accumulated.

Daylight

In Ciwandan, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 05:56 and sunset at 17:56. On the last day of September, in Ciwandan, sunrise is at 05:41 and sunset at 17:50 WIB.

Sunshine

The month with the most sunshine in Ciwandan is September, with an average of 9.3h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Ciwandan. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Ciwandan. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.