September weather forecastOddusuddan, Sri Lanka
September
Weather in September
The first month of the autumn, September, is still a warm month in Oddusuddan, Sri Lanka, with temperature in the range of an average low of 27°C (80.6°F) and an average high of 29.9°C (85.8°F).Temperature
Oddusuddan indicates an average high-temperature of a still moderately hot 29.9°C (85.8°F) in September, showing minor variation from August's 29.8°C (85.6°F). Oddusuddan, during the September nights, maintains an average temperature of 27°C (80.6°F), closely aligned with its daytime readings.Heat index
The average heat index in September is appraised at a very hot 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
In September, the average relative humidity in Oddusuddan, Sri Lanka, is 77%.Rainfall
In Oddusuddan, 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
The average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 05:58 and sunset at 18:16. On the last day of September, in Oddusuddan, sunrise is at 05:55 and sunset at 17:58 +0530.
Sunshine
In September, the average sunshine in Oddusuddan is 9.7h.UV index
January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Oddusuddan. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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
Oddusuddan, 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).
