Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The advent of September brings an average high-temperature of a still warm 27.5°C (81.5°F), exhibiting minor difference from the previous month. Gili Trawangan's nighttime average temperature in September drops marginally from the daytime highs, settling at a still warm 24.1°C (75.4°F).Heat index
Throughout September, the heat index is calculated to be a tropical 31°C (87.8°F). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.Consider that heat index readings are for situations in the shade and light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. 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. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Humidity
The average relative humidity in September is 78%.Rainfall
In September, in Gili Trawangan, the rain falls for 12.3 days. Throughout September, 27mm (1.06") of precipitation is accumulated. In Gili Trawangan, during the entire year, the rain falls for 251.2 days and collects up to 1214mm (47.8") of precipitation.Sea temperature
July through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.
Daylight
In Gili Trawangan, the average length of the day in September is 12h and 4min.On the first day of September, sunrise is at 06:17 and sunset at 18:14. On the last day of the month, sunrise is at 06:00 and sunset at 18:10 WITA.
Sunshine
The average sunshine in September is 9.6h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Gili Trawangan are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 7 during September morphs into the following directions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Gili Trawangan in September?
What is the average humidity in September?
How many days does it rain in September?
What are the months with the coldest sea water?
What is the sea water temperature in September in Gili Trawangan?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Gili Trawangan have in September?
What are the months with the highest UV index?
When is the lowest UV index?
How high is the UV index in September?
Average temperature in September
Gili Trawangan, Indonesia
- Average high temperature in September: 27.5°C
The warmest month (with the highest average high temperature) is November (28.9°C).
The month with the lowest average high temperature is August (27°C).
- Average low temperature in September: 24.1°C
The months with the highest average low temperature are November and December (26.3°C).
The coldest month (with the lowest average low temperature) is August (23.7°C).
Average pressure in September
Gili Trawangan, Indonesia
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is August (1011.9mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).
Average wind speed in September
Gili Trawangan, Indonesia
- Average wind speed in September: 13.2km/h
The windiest month (with the highest average wind speed) is July (13.6km/h).
The calmest month (with the lowest average wind speed) is April (7.8km/h).
Average humidity in September
Gili Trawangan, Indonesia
- Average humidity in September: 78%
The months with the highest relative humidity are January, February, May, June, July and December (79%).
The month with the lowest relative humidity is October (77%).
Average rainfall in September
Gili Trawangan, Indonesia
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is December (208mm).
The driest month (with the least rainfall) is August (15mm).
Average rainfall days in September
Gili Trawangan, Indonesia
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is January (28.1 days).
The month with the least rainy days is August (12.2 days).
Average sea temperature in September
Gili Trawangan, Indonesia
- Average sea temperature in September: 27°C
The best months for swimming (with the highest average sea temperature) are January, February, March, April, November and December (29°C).
The coldest months (with the lowest average sea temperature) are July, August and September (27°C).
Average daylight in September /
Average sunshine in September
Gili Trawangan, Indonesia
- Average daylight in September: 12h and 1min
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 36min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is October (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 54min).
Average sunshine days in September
Gili Trawangan, Indonesia
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is August (12.8 days).
The month with the least sunshine days is January (2.3 days).
Average UV index in September
Gili Trawangan, Indonesia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Gili Trawangan, Indonesia
- Average cloud cover in September: 22
The months with the most cloud cover are January and December (Cloud cover 44).
The months with the least cloud cover are August and September (Cloud cover 22).
Average visibility in September
Gili Trawangan, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January and December (9km).
