September weather forecastWedamulla, Sri Lanka
September weather forecast for Wedamulla, Sri Lanka: The first month of the autumn, September, is still a warm month in Wedamulla, Sri Lanka, with temperature in the range of an average low of 24.9°C (76.8°F) and an average high of 29.1°C (84.4°F). The average heat index, which factors the actual air temperature with the relative humidity, in September is calculated to be 35°C (95°F).
September
Weather in September
The first month of the autumn, September, is still a warm month in Wedamulla, Sri Lanka, with temperature in the range of an average low of 24.9°C (76.8°F) and an average high of 29.1°C (84.4°F).Temperature
The commencement of September introduces an average high-temperature of a still warm 29.1°C (84.4°F), closely mirroring the preceding month. Wedamulla sustains an average of approximately a still warm 24.9°C (76.8°F) during September nights, with little variation from daytime highs.Heat index
The heat index in September is calculated to be a very hot 35°C (95°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the outcome of merging air's temperature and its humidity metrics. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In September, the average relative humidity is 81%.Rainfall
In Wedamulla, in September, during 26.9 rainfall days, 206mm (8.11") of precipitation is typically accumulated. Throughout the year, in Wedamulla, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.Daylight
In Wedamulla, the average length of the day in September is 12h and 10min.On the first day of the month, sunrise is at 06:02 and sunset at 18:17. On the last day of September, sunrise is at 05:58 and sunset at 18:02 +0530.
Sunshine
In September, the average sunshine is 7.4h.UV index
The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 7 in September translates into this advice:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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
Wedamulla, 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).
