September weather forecastKarainagar, Sri Lanka

September

Weather in September

September, the first month of the autumn in Karainagar, is still a warm month, with an average temperature fluctuating between 27.5°C (81.5°F) and 28.8°C (83.8°F).

Temperature

September's beginning signals an average high-temperature of a still moderately hot 28.8°C (83.8°F), identical to August. Karainagar records a negligible downturn from daytime temperatures, averaging a low of 27.5°C (81.5°F) in the month of September.

Heat index

In September, the average heat index is appraised at a tropical 34°C (93.2°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

The months with the highest humidity in Karainagar, Sri Lanka, are May, August and September, with an average relative humidity of 79%.

Rainfall

In Karainagar, in September, it is raining for 15.5 days, with typically 58mm (2.28") of accumulated precipitation. In Karainagar, Sri Lanka, during the entire year, the rain falls for 148.6 days and collects up to 769mm (30.28") of precipitation.

Daylight

In Karainagar, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 06:01 and sunset at 18:19. On the last day of September, sunrise is at 05:58 and sunset at 18:01 +0530.

Sunshine

In Karainagar, the average sunshine in September is 10.2h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Karainagar. 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: A maximum daily UV index of 7 during September morphs into the following directions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Updated: Feb 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature in Karainagar during September is 28.8°C (83.8°F) and the low-temperature is 27.5°C (81.5°F). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in September is appraised at 34°C (93.2°F).

The months with the highest humidity in Karainagar are May, August and September, with an average relative humidity of 79%.

The average relative humidity in September in Karainagar, Sri Lanka, is 79%.

In Karainagar, in September, during 15.5 rainfall days, 58mm (2.28") of precipitation is typically accumulated.

In September, the average day length is 12h and 11min.

On the first day of September, sunrise is at 06:01 and sunset at 18:19. On the last day of the month, sunrise is at 05:58 and sunset at 18:01 +0530.

The average sunshine duration in September in Karainagar, Sri Lanka, is 10.2h.

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Karainagar.

In September, the average daily maximum UV index in Karainagar, Sri Lanka, is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

28.8°C

29.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

29.7km/h

28.8km/h

20.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

17.7

13.8

7.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Karainagar, Sri Lanka

Average high temperature in September: 28.8°C

The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).

Average low temperature in September: 27.5°C

The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).

Average pressure in September
Karainagar, Sri Lanka

Average pressure in September: 1007.6mbar

The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).

Average wind speed in September
Karainagar, Sri Lanka

Average wind speed in September: 28.3km/h

The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).

Average humidity in September
Karainagar, Sri Lanka

Average humidity in September: 79%

The months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).

Average rainfall in September
Karainagar, Sri Lanka

Average rainfall in September: 58mm

The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).

Average rainfall days in September
Karainagar, Sri Lanka

Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).

Average daylight in September /
Average sunshine in September
Karainagar, Sri Lanka

Average daylight in September: 12h and 12min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).

Average sunshine in September: 10h and 12min

The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

Average sunshine days in September
Karainagar, Sri Lanka

Average sunshine days in September: 13.8 days

The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).

Average UV index in September
Karainagar, Sri Lanka

Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).

Average cloud cover in September
Karainagar, Sri Lanka

Average cloud cover in September: 30

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).

Average visibility in September
Karainagar, Sri Lanka

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).