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

January weather forecast and climate
Dehiwala, Sri Lanka

January, like December, is another hot winter month in Dehiwala, Sri Lanka, with average temperature fluctuating between 31°C (87.8°F) and 22°C (71.6°F).

Temperature

In January, the average high-temperature is essentially the same as in December - a still tropical 31°C (87.8°F). In January, in Dehiwala, the average low-temperature is 22°C (71.6°F).

Rainfall

The month with the least rainfall is January when the rain falls for 5 days and typically collects 55mm (2.2") of precipitation.

Sea temperature

In Dehiwala, Sri Lanka, the average seawater temperature in January is 27.7°C (81.9°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

The average length of the day in Dehiwala is 11.8h.

Sunshine

In Dehiwala, the average sunshine is 8h.

UV index

Months with the lowest UV index are January, November and December, with an average maximum UV index of 11. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation for the average person.
The daily maximum UV index of 11 in January interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in January in Dehiwala?

In Dehiwala, in January, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 22°C (71.6°F).

How many days does it rain in January in Dehiwala?

In Dehiwala, in January, it is raining for 5 days, with typically 55mm (2.2") of accumulated precipitation.

What is the driest month in Dehiwala?

January is the month with the least rainfall in Dehiwala. Rain falls for 5 days and accumulates 55mm (2.2") of precipitation.

What is the water temperature in January in Dehiwala?

In January, the average sea temperature in Dehiwala is 27.7°C (81.9°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.

How many hours of daylight does Dehiwala have in January?

In January, the average length of the day is 11.8h.

How many hours of sunshine does Dehiwala have in January?

In Dehiwala, Sri Lanka, the average sunshine in January is 8h.

When is the lowest UV index in Dehiwala?

Months with the lowest UV index in Dehiwala are January, November and December, with an average maximum UV index of 11.

What is the UV index reading in January in Dehiwala?

The average daily maximum UV index in January is 11. A UV Index of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to the UV radiation.
Average temperature in January - Dehiwala, Sri Lanka
  • Average high temperature in January: 31°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 January: 22°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 January - Dehiwala, Sri Lanka
  • Average rainfall in January: 55mm

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

Average rainfall days in January - Dehiwala, Sri Lanka
  • Average rainfall days in January: 5 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 January - Dehiwala, Sri Lanka
  • Average sea temperature in January: 27.7°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 January / Average sunshine in January - Dehiwala, Sri Lanka
  • Average daylight in January: 11.8h

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 January: 8h

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 January - Dehiwala, Sri Lanka
  • Average UV index in January: 11

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).