September weather forecastWalana, Sri Lanka
September weather for Walana, Sri Lanka: September, the first month of the autumn in Walana, is also a moderately hot month, with an average temperature fluctuating between 28.8°C (83.8°F) and 25.2°C (77.4°F). On the first day of September in Walana, sunrise is at 06:03 and sunset at 18:17.
September
Weather in September
September, the first month of the autumn in Walana, is also a moderately hot month, with an average temperature fluctuating between 28.8°C (83.8°F) and 25.2°C (77.4°F).Temperature
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still warm 28.8°C (83.8°F) from August's 28.6°C (83.5°F). Walana indicates a consistently low-temperature of 25.2°C (77.4°F) during the nights of September.Heat index
The heat index value during September is appraised at a very hot 35°C (95°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. 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 of high significance for children. 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.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.
Humidity
The average relative humidity in September in Walana is 82%.Rainfall
In Walana, Sri Lanka, in September, it is raining for 26.3 days, with typically 201mm (7.91") of accumulated precipitation. In Walana, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.Daylight
In September, the average length of the day is 12h and 10min.On the first day of September in Walana, sunrise is at 06:03 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.
Sunshine
In Walana, the average sunshine in September is 7.6h.UV index
January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Walana, Sri Lanka
- Average high temperature in September: 28.8°C
The warmest months (with the highest average high temperature) are March and April (31.3°C).
The month with the lowest average high temperature is August (28.6°C).
- Average low temperature in September: 25.2°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 (23.4°C).
Average pressure in September
Walana, Sri Lanka
- Average pressure in September: 1009.9mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).
Average wind speed in September
Walana, Sri Lanka
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is June (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.9km/h).
Average humidity in September
Walana, Sri Lanka
- Average humidity in September: 82%
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (75%).
Average rainfall in September
Walana, Sri Lanka
- Average rainfall in September: 201mm
The wettest month (with the highest rainfall) is June (350mm).
The driest month (with the least rainfall) is January (25mm).
Average rainfall days in September
Walana, Sri Lanka
- Average rainfall days in September: 26.3 days
The months with the highest number of rainy days are July and August (29.5 days).
The month with the least rainy days is January (8.9 days).
Average daylight in September /
Average sunshine in September
Walana, 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 36min
The month with the most sunshine is January (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 48min).
Average sunshine days in September
Walana, Sri Lanka
- Average sunshine days in September: 1.4 days
The month with the most sunshine days is January (21 days).
The months with the least sunshine days are June and July (0.3 days).
Average UV index in September
Walana, Sri Lanka
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, July, September, October, November and December (UV index 7).
The months with the lowest UV index are May, June and August (UV index 6).
Average cloud cover in September
Walana, Sri Lanka
- Average cloud cover in September: 54
The month with the most cloud cover is June (Cloud cover 55).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in September
Walana, Sri Lanka
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
