September weather forecastBowala, Sri Lanka

September

Weather in September

September, the first month of the autumn in Bowala, is also a moderately hot month, with an average temperature varying between 29.4°C (84.9°F) and 21°C (69.8°F).

Temperature

The beginning of September records an average high-temperature of a still moderately hot 29.4°C (84.9°F), marking a negligible difference from August's 29.2°C (84.6°F). September brings Bowala a consistent average low-temperature of 21°C (69.8°F).

Heat index

For most parts of September, the heat index is appraised at a fiery hot 35°C (95°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Bowala, in September, it is raining for 23.9 days, with typically 129mm (5.08") of accumulated precipitation. Throughout the year, there are 278.9 rainfall days, and 1477mm (58.15") of precipitation is accumulated.

Daylight

In Bowala, the average length of the day in September is 12h and 10min.
On the first day of September in Bowala, sunrise is at 05:59 and sunset at 18:15. On the last day of the month, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

In September, the average sunshine in Bowala is 9.9h.

UV index

The months with the highest UV index in Bowala are January through September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 6 in September translates into this advice:
Ward off overexposure. Defence against solar harm is crucial. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

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

Frequently asked questions

The high-temperature during September is 29.4°C (84.9°F) and the low-temperature is 21°C (69.8°F). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is appraised at 35°C (95°F).

In September, the average relative humidity in Bowala, Sri Lanka, is 77%.

In Bowala, Sri Lanka, during September, the rain falls for 23.9 days and regularly aggregates up to 129mm (5.08") of precipitation.

The average day length in September in Bowala, Sri Lanka, is 12h and 10min.

In September, on the first day of the month, sunrise is at 05:59 and sunset at 18:15. On the last day of the month, in Bowala, sunrise is at 05:55 and sunset at 17:59 +0530.

In Bowala, the average sunshine duration in September is 9.9h.

The months with the highest UV index in Bowala, Sri Lanka, are January through September, November and December, with an average maximum UV index of 6.

In Bowala, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

29.2°C

29.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.5km/h

11.4km/h

7.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

2.6

3.6

2.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Bowala, Sri Lanka

Average high temperature in September: 29.4°C

The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).

Average low temperature in September: 21°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 (18.1°C).

Average pressure in September
Bowala, Sri Lanka

Average pressure in September: 1009.2mbar

The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).

Average wind speed in September
Bowala, Sri Lanka

Average wind speed in September: 10.6km/h

The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).

Average humidity in September
Bowala, Sri Lanka

Average humidity in September: 77%

The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).

Average rainfall in September
Bowala, Sri Lanka

Average rainfall in September: 129mm

The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).

Average rainfall days in September
Bowala, Sri Lanka

Average rainfall days in September: 23.9 days

The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).

Average daylight in September /
Average sunshine in September
Bowala, 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: 9h and 54min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in September
Bowala, Sri Lanka

Average sunshine days in September: 3.6 days

The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).

Average UV index in September
Bowala, Sri Lanka

Average UV index in September: 6

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

Average cloud cover in September
Bowala, Sri Lanka

Average cloud cover in September: 36

The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).

Average visibility in September
Bowala, Sri Lanka

Average visibility in September: 9km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).