Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The dawn of September sees an average high-temperature of a still warm 27.5°C (81.5°F), on par with August's climate. Kalawana registers a consistent average low-temperature of 20.9°C (69.6°F) during September.Heat index
The average heat index in September is computed to be a tropical 32°C (89.6°F). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
The average relative humidity in September is 86%.Rainfall
In Kalawana, Sri Lanka, during September, the rain falls for 25.8 days and regularly aggregates up to 178mm (7.01") of precipitation. Throughout the year, there are 317.3 rainfall days, and 2422mm (95.35") of precipitation is accumulated.Daylight
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 18:15. On the last day of September, in Kalawana, sunrise is at 05:56 and sunset at 18:00 +0530.
Sunshine
The average sunshine in September in Kalawana, Sri Lanka, is 7.5h.UV index
September and October, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Take precautions - Protection against sun damage is advised. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What is the average September temperature in Kalawana?
What is the average humidity in September in Kalawana?
How many days does it rain in September in Kalawana?
What is the average length of the day in September in Kalawana?
When is the sunrise / sunset in September in Kalawana?
How many hours of sunshine does Kalawana have in September?
What are the months with the lowest UV index in Kalawana?
What is the UV index reading in September in Kalawana?
Average temperature in September
Kalawana, Sri Lanka
- Average high temperature in September: 27.5°C
The warmest month (with the highest average high temperature) is March (31.1°C).
The months with the lowest average high temperature are June and July (27.3°C).
- Average low temperature in September: 20.9°C
The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.7°C).
Average pressure in September
Kalawana, 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
Kalawana, Sri Lanka
- Average wind speed in September: 7.4km/h
The windiest month (with the highest average wind speed) is July (8.8km/h).
The calmest months (with the lowest average wind speed) are February and March (3.9km/h).
Average humidity in September
Kalawana, Sri Lanka
- Average humidity in September: 86%
The months with the highest relative humidity are May and June (88%).
The months with the lowest relative humidity are January and February (80%).
Average rainfall in September
Kalawana, Sri Lanka
- Average rainfall in September: 178mm
The wettest month (with the highest rainfall) is October (357mm).
The driest month (with the least rainfall) is January (85mm).
Average rainfall days in September
Kalawana, Sri Lanka
- Average rainfall days in September: 25.8 days
The month with the highest number of rainy days is May (29.8 days).
The month with the least rainy days is January (18.9 days).
Average daylight in September /
Average sunshine in September
Kalawana, Sri Lanka
- Average daylight in September: 12h and 1min
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 48min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is April (Average sunshine: 8h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Kalawana, Sri Lanka
- Average sunshine days in September: 1.4 days
The month with the most sunshine days is January (9.2 days).
The month with the least sunshine days is April (0.2 days).
Average UV index in September
Kalawana, Sri Lanka
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, June, July, August, November and December (UV index 6).
The months with the lowest UV index are September and October (UV index 5).
Average cloud cover in September
Kalawana, Sri Lanka
- Average cloud cover in September: 59
The month with the most cloud cover is June (Cloud cover 65).
The month with the least cloud cover is January (Cloud cover 33).
Average visibility in September
Kalawana, Sri Lanka
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, June, July, August and December (8km).
The months with the lowest visibility are April, May, September, October and November (7km).
Kalawana, Sri Lanka
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