September weather forecast and climate
Peliyagoda, Sri Lanka

September, the first month of the autumn, in Peliyagoda, is still a warm month, with average temperature ranging between min 24.9°C (76.8°F) and max 29.1°C (84.4°F).

Temperature

In Peliyagoda, Sri Lanka, the average high-temperature in September is essentially the same as in August - a still moderately hot 29.1°C (84.4°F). The average low-temperature, in September, is 24.9°C (76.8°F).

Heat index

The average heat index is evaluated at a torrid 35.2°C (95.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, pregnancy, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Peliyagoda, the average relative humidity in September is 81%.

Rainfall

In Peliyagoda, during September, the rain falls for 26.9 days and regularly aggregates up to 206mm (8.11") of precipitation. Throughout the year, in Peliyagoda, Sri Lanka, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature in Peliyagoda is 27.8°C (82°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in September is 12.2h.

Sunshine

The average sunshine in September is 7.4h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Peliyagoda. A UV Index reading of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Peliyagoda?

In Peliyagoda, in September, the average high-temperature is 29.1°C (84.4°F), and the average low-temperature is 24.9°C (76.8°F). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 35.2°C (95.4°F).

What is the average humidity in September in Peliyagoda?

In September, the average relative humidity in Peliyagoda, Sri Lanka, is 81%.

How many days does it rain in September in Peliyagoda?

In Peliyagoda, Sri Lanka, in September, during 26.9 rainfall days, 206mm (8.11") of precipitation is typically accumulated.

How warm is the water in September in Peliyagoda?

In September, the average sea temperature is 27.8°C (82°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Peliyagoda?

In September, the average length of the day in Peliyagoda is 12.2h.

How long on average sun shines in September in Peliyagoda?

In Peliyagoda, the average sunshine in September is 7.4h.

What are the months with the highest UV index in Peliyagoda?

Months with the highest UV index in Peliyagoda are January through April, July, September, November and December, with an average maximum UV index of 7.

What is the UV index intensity in September in Peliyagoda?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Peliyagoda, Sri Lanka
  • Average high temperature in September: 29.1°C

The warmest months (with the highest average high temperature) are March and April (31.8°C).
Months with the lowest average high temperature are July and August (28.9°C).

  • Average low temperature in September: 24.9°C

The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.1°C).

Average pressure in September - Peliyagoda, Sri Lanka
  • Average pressure in September: 1009.8mbar

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 - Peliyagoda, Sri Lanka
  • Average wind speed in September: 13.2km/h

The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).

Average humidity in September - Peliyagoda, Sri Lanka
  • Average humidity in September: 81%

Months with the highest relative humidity are June, July and August (83%).
Months with the lowest relative humidity are January and February (74%).

Average rainfall in September - Peliyagoda, Sri Lanka
  • Average rainfall in September: 206mm

The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).

Average rainfall days in September - Peliyagoda, Sri Lanka
  • Average rainfall days in September: 26.9 days

The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).

Average sea temperature in September - Peliyagoda, Sri Lanka
  • Average sea temperature in September: 27.8°C

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).

Average daylight in September / Average sunshine in September - Peliyagoda, 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: 7.4h

The month with the most sunshine is January (Average sunshine: 9.1h).
The month with the least sunshine is November (Average sunshine: 6.7h).

Average sunshine days in September - Peliyagoda, Sri Lanka
  • Average sunshine days in September: 1.5 days

The month with the most sunshine days is January (17.2 days).
Months with the least sunshine days are June and August (0.3 days).

Average UV index in September - Peliyagoda, Sri Lanka
  • Average UV index in September: 7

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

Average cloud cover in September - Peliyagoda, Sri Lanka
  • Average cloud cover in September: 55

The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).

Average visibility in September - Peliyagoda, Sri Lanka
  • Average visibility in September: 9km

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