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 arrival of September sees a recorded average high-temperature of a still moderately hot 27.5°C (81.5°F), without divergence from the previous month's conditions. Throughout the month of September, Udakanda reports a steady low-temperature average of 20.8°C (69.4°F).Heat index
The heat index value for September is estimated at a tropical 32°C (89.6°F). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The average relative humidity in September in Udakanda is 86%.Rainfall
In Udakanda, during September, the rain falls for 26.2 days and regularly aggregates up to 223mm (8.78") of precipitation. Throughout the year, in Udakanda, there are 317.7 rainfall days, and 2467mm (97.13") of precipitation is accumulated.Daylight
In September, the average length of the day in Udakanda is 12h and 10min.On the first day of the month, sunrise is at 05:59 and sunset at 18:14. On the last day of September, sunrise is at 05:55 and sunset at 17:59 +0530.
Sunshine
In Udakanda, Sri Lanka, the average sunshine in September is 7.3h.UV index
The months with the lowest UV index in Udakanda, Sri Lanka, are September and October, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are September temperatures in Udakanda?
What is the average humidity in September in Udakanda?
How many days does it rain in September in Udakanda?
What is the average length of the day in September in Udakanda?
When is the sunrise / sunset in September in Udakanda?
How long on average sun shines in September in Udakanda?
What is the month with the lowest UV index in Udakanda?
What is the UV index reading in September in Udakanda?
Average temperature in September
Udakanda, 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: 20.8°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
Udakanda, Sri Lanka
- Average pressure in September: 1009.7mbar
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
Udakanda, Sri Lanka
- Average wind speed in September: 7.3km/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
Udakanda, 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
Udakanda, Sri Lanka
- Average rainfall in September: 223mm
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
Udakanda, Sri Lanka
- Average rainfall days in September: 26.2 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
Udakanda, 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 42min).
- Average sunshine in September: 7h and 2min
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
Udakanda, Sri Lanka
- Average sunshine days in September: 1.3 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
Udakanda, 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
Udakanda, Sri Lanka
- Average cloud cover in September: 60
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
Udakanda, 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).
Udakanda, Sri Lanka
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