September weather forecastKotalama, Indonesia
September weather forecast for Kotalama, Indonesia: The first month of the spring, September, is still a warm month in Kotalama, Indonesia, with an average temperature varying between 27°C (80.6°F) and 18.2°C (64.8°F). In September, the average heat index, which takes the relative humidity and factors it into the air temperature reading, is evaluated at 30°C (86°F).
September
Weather in September
The first month of the spring, September, is still a warm month in Kotalama, Indonesia, with an average temperature varying between 27°C (80.6°F) and 18.2°C (64.8°F).Temperature
September's onset records a minor alteration in the average high-temperature to a still warm 27°C (80.6°F) from August's 26.2°C (79.2°F). Kotalama's nighttime temperature in September falls to an average of 18.2°C (64.8°F).Heat index
September's mean heat index is evaluated at a hot 30°C (86°F). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.Heat index determinations are made taking into account the shade and light air movements. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
In September, the average relative humidity is 80%.Rainfall
In Kotalama, in September, during 17.2 rainfall days, 85mm (3.35") of precipitation is typically accumulated. In Kotalama, during the entire year, the rain falls for 312.3 days and collects up to 3812mm (150.08") of precipitation.Daylight
The average length of the day in September in Kotalama is 12h and 4min.On the first day of the month, sunrise is at 05:30 and sunset at 17:28. On the last day of September, in Kotalama, sunrise is at 05:14 and sunset at 17:24 WIB.
Sunshine
September has the most sunshine of the year, with an average of 8.4h of sunshine.UV index
The months with the highest UV index are February through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kotalama, Indonesia
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is October (28.3°C).
The month with the lowest average high temperature is January (25.3°C).
- Average low temperature in September: 18.2°C
The month with the highest average low temperature is November (20.5°C).
The coldest month (with the lowest average low temperature) is August (17.8°C).
Average pressure in September
Kotalama, Indonesia
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is August (1011.8mbar).
The month with the lowest atmospheric pressure is December (1008.8mbar).
Average wind speed in September
Kotalama, Indonesia
- Average wind speed in September: 7.1km/h
The windiest months (with the highest average wind speed) are August and September (7.1km/h).
The calmest month (with the lowest average wind speed) is April (4.1km/h).
Average humidity in September
Kotalama, Indonesia
- Average humidity in September: 80%
The months with the highest relative humidity are February and March (90%).
The month with the lowest relative humidity is October (78%).
Average rainfall in September
Kotalama, Indonesia
- Average rainfall in September: 85mm
The wettest month (with the highest rainfall) is January (627mm).
The driest month (with the least rainfall) is August (35mm).
Average rainfall days in September
Kotalama, Indonesia
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is January (30.9 days).
The month with the least rainy days is September (17.2 days).
Average daylight in September /
Average sunshine in September
Kotalama, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is September (Average sunshine: 8h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in September
Kotalama, Indonesia
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is August (11.1 days).
The months with the least sunshine days are January, February and April (0 days).
Average UV index in September
Kotalama, Indonesia
- Average UV index in September: 6
The months with the highest UV index are February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in September
Kotalama, Indonesia
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is September (Cloud cover 43).
Average visibility in September
Kotalama, Indonesia
- Average visibility in September: 8km
The months with the highest visibility are September and October (8km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, November and December (7km).
