September weather forecast
Colo, Indonesia

September, the first month of the spring in Colo, is also a hot month, with an average temperature varying between 23.7°C (74.7°F) and 32.6°C (90.7°F).

Temperature

Entering September, the average high-temperature is recorded at a still hot 32.6°C (90.7°F), exhibiting a minimal shift from August's 31.7°C (89.1°F). The average nighttime temperature lowers to a warm 23.7°C (74.7°F) throughout September.

Heat index

The heat index in September is computed to be an extremely hot 41°C (105.8°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. 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 important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The least humid month is September, with an average relative humidity of 67%.

Rainfall

In Colo, in September, during 10.6 rainfall days, 27mm (1.06") of precipitation is typically accumulated. In Colo, Indonesia, during the entire year, the rain falls for 238.8 days and collects up to 1049mm (41.3") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 05:36 and sunset at 17:35. On the last day of September, sunrise is at 05:21 and sunset at 17:31 WIB.

Sunshine

The months with the most sunshine are August and September, with an average of 9.7h of sunshine.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. 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: In September, an average UV index of 7 transforms into the following instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.