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 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
Weather in September
Temperature
With the arrival of September, Mandaitivu transitions to an average high temperature of a still moderately hot 28.8°C (83.8°F), nearly identical to August's weather. A mean low-temperature of 27.5°C (81.5°F) is a distinguishing feature of September in Mandaitivu, indicating a slight dip from daytime highs.Heat index
The heat index value during September is estimated at a tropical 34°C (93.2°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Records show heat index calculations are tailored for shaded regions and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The months with the highest humidity are May, August and September, with an average relative humidity of 79%.Rainfall
In Mandaitivu, Sri Lanka, during September, the rain falls for 15.5 days and regularly aggregates up to 58mm (2.28") of precipitation. Throughout the year, there are 148.6 rainfall days, and 769mm (30.28") of precipitation is accumulated.Daylight
In September, the average length of the day in Mandaitivu is 12h and 11min.On the first day of the month, sunrise is at 06:00 and sunset at 18:18. On the last day of September, sunrise is at 05:58 and sunset at 18:01 +0530.
Sunshine
The average sunshine in September in Mandaitivu, Sri Lanka, is 10.2h.UV index
January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Mandaitivu. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 7 in September translates into this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
Is it hot in Mandaitivu during September?
What is the most humid month in Mandaitivu?
What is the average humidity in September in Mandaitivu?
How many days does it rain in September in Mandaitivu?
What is the average length of the day in September in Mandaitivu?
When is the sunrise / sunset in September in Mandaitivu?
How long on average sun shines in September in Mandaitivu?
What is the month with the highest UV index in Mandaitivu?
What is the UV index reading in September in Mandaitivu?
Average temperature in September
Mandaitivu, Sri Lanka
- Average high temperature in September: 28.8°C
The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in September: 27.5°C
The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).
Average pressure in September
Mandaitivu, Sri Lanka
- Average pressure in September: 1007.6mbar
The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).
Average wind speed in September
Mandaitivu, Sri Lanka
- Average wind speed in September: 28.3km/h
The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).
Average humidity in September
Mandaitivu, Sri Lanka
- Average humidity in September: 79%
The months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).
Average rainfall in September
Mandaitivu, Sri Lanka
- Average rainfall in September: 58mm
The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).
Average rainfall days in September
Mandaitivu, Sri Lanka
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).
Average daylight in September /
Average sunshine in September
Mandaitivu, Sri Lanka
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Mandaitivu, Sri Lanka
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).
Average UV index in September
Mandaitivu, Sri Lanka
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).
Average cloud cover in September
Mandaitivu, Sri Lanka
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).
Average visibility in September
Mandaitivu, Sri Lanka
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Mandaitivu, Sri Lanka
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