September weather forecastAdampan, Sri Lanka
September
Weather in September
September, the first month of the autumn in Adampan, is also a moderately hot month, with an average temperature varying between 29.9°C (85.8°F) and 27°C (80.6°F).Temperature
Adampan's September average high-temperature settles at a still moderately hot 29.9°C (85.8°F), showing a near match with the preceding month. Recording a slight decline in temperature during the nights, Adampan's September temperatures average at a still warm 27°C (80.6°F).Heat index
During September, the heat index is appraised at a fiery hot 37°C (98.6°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
The average relative humidity in September is 77%.Rainfall
In Adampan, in September, during 15.5 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, there are 181.2 rainfall days, and 849mm (33.43") of precipitation is accumulated.Daylight
In Adampan, the average length of the day in September is 12h and 10min.On the first day of the month, sunrise is at 06:01 and sunset at 18:18. On the last day of September, sunrise is at 05:58 and sunset at 18:01 +0530.
Sunshine
In Adampan, the average sunshine in September is 9.7h.UV index
The months with the highest UV index in Adampan are January through October and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. 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. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Adampan, Sri Lanka
- Average high temperature in September: 29.9°C
The warmest month (with the highest average high temperature) is April (31.4°C).
The month with the lowest average high temperature is January (28.4°C).
- Average low temperature in September: 27°C
The month with the highest average low temperature is May (28.1°C).
The coldest month (with the lowest average low temperature) is February (23.9°C).
Average pressure in September
Adampan, Sri Lanka
- Average pressure in September: 1008mbar
The month with the highest atmospheric pressure is January (1012.2mbar).
The month with the lowest atmospheric pressure is June (1006.5mbar).
Average wind speed in September
Adampan, Sri Lanka
- Average wind speed in September: 27.1km/h
The windiest month (with the highest average wind speed) is June (32.4km/h).
The calmest month (with the lowest average wind speed) is April (15.4km/h).
Average humidity in September
Adampan, Sri Lanka
- Average humidity in September: 77%
The months with the highest relative humidity are November and December (79%).
The month with the lowest relative humidity is March (75%).
Average rainfall in September
Adampan, Sri Lanka
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is November (207mm).
The driest month (with the least rainfall) is June (28mm).
Average rainfall days in September
Adampan, Sri Lanka
- Average rainfall days in September: 15.5 days
The months with the highest number of rainy days are October and November (23.8 days).
The month with the least rainy days is February (9.1 days).
Average daylight in September /
Average sunshine in September
Adampan, Sri Lanka
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in September: 9h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The months with the least sunshine are November and December (Average sunshine: 5h and 42min).
Average sunshine days in September
Adampan, Sri Lanka
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is March (19 days).
The month with the least sunshine days is November (4.4 days).
Average UV index in September
Adampan, 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
Adampan, Sri Lanka
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is March (Cloud cover 18).
Average visibility in September
Adampan, Sri Lanka
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
