September weather forecast and climate
Nuwara Eliya, Sri Lanka

Weather in September

September, the first month of the autumn, in Nuwara Eliya, is also a moderately hot month, with average temperature fluctuating between 27.1°C (80.8°F) and 18.7°C (65.7°F).

Temperature

In Nuwara Eliya, Sri Lanka, the average high-temperature in September remains equal as in August - a still warm 27.1°C (80.8°F). The average low-temperature, in September, is 18.7°C (65.7°F).

Heat index

The average heat index is calculated to be a tropical 30.2°C (86.4°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, differences in body mass, height, and shape, metabolic differences, and wind affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Nuwara Eliya, Sri Lanka, the average relative humidity is 82%.

Rainfall

In September, the rain falls for 25.5 days. Throughout September, 182mm (7.17") of precipitation is accumulated. In Nuwara Eliya, Sri Lanka, during the entire year, the rain falls for 297.4 days and collects up to 2784mm (109.61") of precipitation.

Daylight

In Nuwara Eliya, the average length of the day is 12.2h.

Sunshine

In Nuwara Eliya, the average sunshine is 9.5h.

UV index

Months with the highest UV index are February through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Nuwara Eliya?

The average high-temperature, in September, in Nuwara Eliya, Sri Lanka, is 27.1°C (80.8°F), while the average low-temperature is 18.7°C (65.7°F). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 30.2°C (86.4°F).

What is the average humidity in September in Nuwara Eliya?

The average relative humidity in September is 82%.

How many days does it rain in September in Nuwara Eliya?

In Nuwara Eliya, in September, it is raining for 25.5 days, with typically 182mm (7.17") of accumulated precipitation.

How many hours of daylight does Nuwara Eliya have in September?

In Nuwara Eliya, Sri Lanka, the average length of the day in September is 12.2h.

How long on average sun shines in September in Nuwara Eliya?

The average sunshine in September in Nuwara Eliya, Sri Lanka, is 9.5h.

When is the highest UV index in Nuwara Eliya?

February through September, with an average maximum UV index of 6, are months with the highest UV index in Nuwara Eliya.

What is the UV index reading in September in Nuwara Eliya?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Nuwara Eliya, Sri Lanka

Average temperature in September - Nuwara Eliya, Sri Lanka
  • Average high temperature in September: 27.1°C

The warmest month (with the highest average high temperature) is April (27.6°C).
The month with the lowest average high temperature is December (24.3°C).

  • Average low temperature in September: 18.7°C

The month with the highest average low temperature is May (19.1°C).
The coldest month (with the lowest average low temperature) is February (15.3°C).

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Average pressure in September
Nuwara Eliya, Sri Lanka

Average pressure in September - Nuwara Eliya, Sri Lanka
  • Average pressure in September: 1009.5mbar

The month with the highest atmospheric pressure is January (1011.7mbar).
The month with the lowest atmospheric pressure is June (1008.3mbar).

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Average wind speed in September
Nuwara Eliya, Sri Lanka

Average wind speed in September - Nuwara Eliya, Sri Lanka
  • Average wind speed in September: 7.1km/h

The windiest month (with the highest average wind speed) is June (9.1km/h).
The calmest month (with the lowest average wind speed) is April (3.3km/h).

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Average humidity in September
Nuwara Eliya, Sri Lanka

Average humidity in September - Nuwara Eliya, Sri Lanka
  • Average humidity in September: 82%

The month with the highest relative humidity is November (89%).
The month with the lowest relative humidity is March (80%).

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Average rainfall in September
Nuwara Eliya, Sri Lanka

Average rainfall in September - Nuwara Eliya, Sri Lanka
  • Average rainfall in September: 182mm

The wettest month (with the highest rainfall) is October (656mm).
The driest month (with the least rainfall) is January (85mm).

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Average rainfall days in September
Nuwara Eliya, Sri Lanka

Average rainfall days in September - Nuwara Eliya, Sri Lanka
  • Average rainfall days in September: 25.5 days

The month with the highest number of rainy days is May (29.8 days).
The month with the least rainy days is February (16.3 days).

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Average daylight in September /
Average sunshine in September
Nuwara Eliya, Sri Lanka

Average daylight in September / Average sunshine in September - Nuwara Eliya, Sri Lanka
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.5h).
The month with the shortest days is December (Average daylight: 11.7h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is June (Average sunshine: 10h).
The month with the least sunshine is December (Average sunshine: 4.6h).

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Average sunshine days in September
Nuwara Eliya, Sri Lanka

Average sunshine days in September - Nuwara Eliya, Sri Lanka
  • Average sunshine days in September: 2.2 days

The month with the most sunshine days is February (11 days).
The month with the least sunshine days is May (0.8 days).

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Average UV index in September
Nuwara Eliya, Sri Lanka

Average UV index in September - Nuwara Eliya, Sri Lanka
  • Average UV index in September: 6

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 6).
Months with the lowest UV index are January, October, November and December (UV index 5).

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Average cloud cover in September
Nuwara Eliya, Sri Lanka

Average cloud cover in September - Nuwara Eliya, Sri Lanka
  • Average cloud cover in September: 44

The month with the most cloud cover is November (Cloud cover 63).
Months with the least cloud cover are July and August (Cloud cover 42).

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Average visibility in September
Nuwara Eliya, Sri Lanka

Average visibility in September - Nuwara Eliya, Sri Lanka
  • Average visibility in September: 8km

Months with the highest visibility are June, July and August (9km).
Months with the lowest visibility are November and December (6km).

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