September weather forecastEthul Kotte, Sri Lanka
September weather forecast for Ethul Kotte, Sri Lanka: September, the first month of the autumn in Ethul Kotte, is also a moderately hot month, with an average temperature ranging between min 24.9°C (76.8°F) and max 29.1°C (84.4°F). In Ethul Kotte, during September, the rain falls for 26.9 days and regularly aggregates up to 206mm (8.11") of precipitation.
September
Weather in September
September, the first month of the autumn in Ethul Kotte, is also a moderately hot month, with an average temperature ranging between min 24.9°C (76.8°F) and max 29.1°C (84.4°F).Temperature
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still warm 29.1°C (84.4°F) from August's 28.9°C (84°F). Nighttime temperature reflects an average dip to a still moderately hot 24.9°C (76.8°F) in September, subtly cooler than its daytime highs.Heat index
For most parts of September, the heat index is appraised at a sweltering 35°C (95°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
In September, the average relative humidity is 81%.Rainfall
In Ethul Kotte, in September, during 26.9 rainfall days, 206mm (8.11") of precipitation is typically accumulated. In Ethul Kotte, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.Daylight
The average length of the day in September is 12h and 10min.On the first day of September, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.
Sunshine
The average sunshine in September in Ethul Kotte is 7.4h.UV index
January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a daily UV index of 7 turns into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ethul Kotte, Sri Lanka
- Average high temperature in September: 29.1°C
The warmest months (with the highest average high temperature) are March and April (31.8°C).
The months with the lowest average high temperature are July and August (28.9°C).
- Average low temperature in September: 24.9°C
The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.1°C).
Average pressure in September
Ethul Kotte, Sri Lanka
- Average pressure in September: 1009.8mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).
Average wind speed in September
Ethul Kotte, Sri Lanka
- Average wind speed in September: 13.2km/h
The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).
Average humidity in September
Ethul Kotte, Sri Lanka
- Average humidity in September: 81%
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in September
Ethul Kotte, Sri Lanka
- Average rainfall in September: 206mm
The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).
Average rainfall days in September
Ethul Kotte, Sri Lanka
- Average rainfall days in September: 26.9 days
The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).
Average daylight in September /
Average sunshine in September
Ethul Kotte, Sri Lanka
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in September
Ethul Kotte, Sri Lanka
- Average sunshine days in September: 1.5 days
The month with the most sunshine days is January (17.2 days).
The months with the least sunshine days are June and August (0.3 days).
Average UV index in September
Ethul Kotte, Sri Lanka
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).
Average cloud cover in September
Ethul Kotte, Sri Lanka
- Average cloud cover in September: 55
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in September
Ethul Kotte, Sri Lanka
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
