September weather forecastPottuvil, Sri Lanka

September

Weather in September

September, the first month of the autumn in Pottuvil, is also a hot month, with temperature in the range of an average low of 25.7°C (78.3°F) and an average high of 31.8°C (89.2°F).

Temperature

Pottuvil in September witnesses an average high-temperature of a still tropical 31.8°C (89.2°F), indicating a slight variation from August's 32.3°C (90.1°F). Pottuvil records an average nighttime low of 25.7°C (78.3°F) in September.

Heat index

For most parts of September, the heat index is appraised at a blistering 41°C (105.8°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The average relative humidity in September is 72%.

Rainfall

In September, the rain falls for 22 days. Throughout September, 81mm (3.19") of precipitation is accumulated. In Pottuvil, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 05:55 and sunset at 18:09. On the last day of the month, sunrise is at 05:50 and sunset at 17:54 +0530.

Sunshine

The average sunshine in September is 10.7h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.

Updated: Aug 30, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in September, in Pottuvil, records 31.8°C (89.2°F), while the low-temperature is 25.7°C (78.3°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is appraised at 41°C (105.8°F).

In September, the average relative humidity is 72%.

In Pottuvil, in September, it is raining for 22 days, with typically 81mm (3.19") of accumulated precipitation.

In September, the average day length is 12h and 10min.

In September, on the first day of the month, sunrise is at 05:55 and sunset at 18:09. On the last day of the month, sunrise is at 05:50 and sunset at 17:54 +0530.

In September, the average sunshine duration in Pottuvil is 10.7h.

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

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

32.3°C

31.8°C

31°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.8km/h

10.2km/h

10.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

6.9

5.8

4.4

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Pottuvil, Sri Lanka

Average high temperature in September: 31.8°C

The warmest month (with the highest average high temperature) is June (33°C).
The month with the lowest average high temperature is January (27.3°C).

Average low temperature in September: 25.7°C

The month with the highest average low temperature is May (26.6°C).
The coldest month (with the lowest average low temperature) is January (24°C).

Average pressure in September
Pottuvil, Sri Lanka

Average pressure in September: 1008.8mbar

The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1007.3mbar).

Average wind speed in September
Pottuvil, Sri Lanka

Average wind speed in September: 9.1km/h

The windiest month (with the highest average wind speed) is January (13.9km/h).
The calmest month (with the lowest average wind speed) is September (9.1km/h).

Average humidity in September
Pottuvil, Sri Lanka

Average humidity in September: 72%

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are June and July (68%).

Average rainfall in September
Pottuvil, Sri Lanka

Average rainfall in September: 81mm

The wettest month (with the highest rainfall) is December (272mm).
The driest month (with the least rainfall) is June (30mm).

Average rainfall days in September
Pottuvil, Sri Lanka

Average rainfall days in September: 22 days

The months with the highest number of rainy days are October and November (25.5 days).
The month with the least rainy days is March (12.8 days).

Average daylight in September /
Average sunshine in September
Pottuvil, 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: 10h and 42min

The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in September
Pottuvil, Sri Lanka

Average sunshine days in September: 5.8 days

The month with the most sunshine days is March (15.5 days).
The month with the least sunshine days is November (3.2 days).

Average UV index in September
Pottuvil, 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 and October (UV index 7).
The months with the lowest UV index are November and December (UV index 6).

Average cloud cover in September
Pottuvil, Sri Lanka

Average cloud cover in September: 28

The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is April (Cloud cover 22).

Average visibility in September
Pottuvil, Sri Lanka

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are November and December (9km).