Dehiwala
Sri Lanka
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Dehiwala, Sri Lanka

October, like September, is another tropical autumn month in Dehiwala, Sri Lanka, with average temperature varying between 30°C (86°F) and 24°C (75.2°F).

Temperature

June through December, with an average high-temperature of 30°C (86°F), are the coldest months.

Rainfall

In Dehiwala, in October, during 16 rainfall days, 371mm (14.6") of precipitation is typically accumulated. In Dehiwala, during the entire year, the rain falls for 139 days and collects up to 2402mm (94.6") of precipitation.

Sea temperature

In October, the average sea temperature is 28.6°C (83.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Dehiwala, the average length of the day in October is 12h.

Sunshine

May through October, with an average of 6h of sunshine, are months with the least sunshine.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index in Dehiwala. A UV Index estimate of 11, and higher, represents an extreme threat to health from unprotected exposure to the Sun's UV rays for the average person.
The average daily UV index of 12 transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What are the coldest months in Dehiwala?

The coldest months in Dehiwala, Sri Lanka, are June through December, with an average high-temperature of 30°C (86°F).

What is the temperature in October in Dehiwala?

In October, in Dehiwala, Sri Lanka, the average high-temperature is 30°C (86°F), and the average low-temperature is 24°C (75.2°F).

How much does it rain in Dehiwala in October?

In Dehiwala, Sri Lanka, during October, the rain falls for 16 days and regularly aggregates up to 371mm (14.6") of precipitation.

How warm is the water in October in Dehiwala?

In Dehiwala, Sri Lanka, the average seawater temperature in October is 28.6°C (83.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Dehiwala have in October?

In October, the average length of the day in Dehiwala, Sri Lanka, is 12h.

What is the month with the least sunshine in Dehiwala?

May through October, with an average of 6h of sunshine, are months with the least sunshine in Dehiwala, Sri Lanka.

How long on average sun shines in October in Dehiwala?

In Dehiwala, the average sunshine in October is 6h.

When is the highest UV index in Dehiwala?

Months with the highest UV index in Dehiwala are February through October, with an average maximum UV index of 12.

What is the UV index reading in October in Dehiwala?

In October, the average daily maximum UV index is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from the exposure to the Sun's UV radiation.
Average temperature in October - Dehiwala, Sri Lanka
  • Average high temperature in October: 30°C

Warmest months (with the highest average high temperature) are March and April (32°C).
Months with the lowest average high temperature are June, July, August, September, October, November and December (30°C).

  • Average low temperature in October: 24°C

Months with the highest average low temperature are May, June, July, August and September (25°C).
Coldest months (with the lowest average low temperature) are January and December (22°C).

Average rainfall in October - Dehiwala, Sri Lanka
  • Average rainfall in October: 371mm

The wettest month (with the highest rainfall) is May (382mm).
The driest month (with the lowest rainfall) is January (55mm).

Average rainfall days in October - Dehiwala, Sri Lanka
  • Average rainfall days in October: 16 days

The month with the highest number of rainy days is October (16 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in October - Dehiwala, Sri Lanka
  • Average sea temperature in October: 28.6°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 October / Average sunshine in October - Dehiwala, Sri Lanka
  • Average daylight in October: 12h

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

  • Average sunshine in October: 6h

Months with most sunshine are February and March (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September and October (Average sunshine: 6).

Average UV index in October - Dehiwala, Sri Lanka
  • Average UV index in October: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 11).