January weather forecast and climate
Colombo, Sri Lanka

Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake
Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake

Weather in January

January in Colombo, Sri Lanka, is a tropical winter month, with average temperature ranging between max 30.8°C (87.4°F) and min 23.1°C (73.6°F).

Temperature

In January, the average high-temperature is almost the same as in December - a hot 30.8°C (87.4°F). The average low-temperature,, is 23.1°C (73.6°F).

Heat index

In January, the average heat index is calculated to be a very hot 38.3°C (100.9°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, wind), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

January and February, with an average relative humidity of 74%, are the least humid months.

Rainfall

The month with the least rainfall in Colombo is January when the rain falls for 11.6 days and typically collects 40mm (1.57") of precipitation.

Sea temperature

In Colombo, in January, the average water temperature is 27.7°C (81.9°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

In January, the average length of the day in Colombo, Sri Lanka, is 11.8h.

Sunshine

January has the most sunshine of the year, with an average of 9.1h of sunshine.

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 Colombo. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in January transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in January in Colombo?

In Colombo, Sri Lanka, in January, the average high-temperature is 30.8°C (87.4°F), and the average low-temperature is 23.1°C (73.6°F). In January, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 38.3°C (100.9°F).

What are the least humid months in Colombo?

January and February, with an average relative humidity of 74%, are the least humid months in Colombo, Sri Lanka.

What is the average humidity in January in Colombo?

The average relative humidity in January in Colombo, Sri Lanka, is 74%.

What is the driest month in Colombo?

The month with the least rainfall is January when the rain falls for 11.6 days and typically collects 40mm (1.57") of precipitation.

How much does it rain in Colombo in January?

In Colombo, Sri Lanka, in January, during 11.6 rainfall days, 40mm (1.57") of precipitation is typically accumulated.

How warm is the water in January in Colombo?

In January, the average sea temperature in Colombo, Sri Lanka, is 27.7°C (81.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Colombo have in January?

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

What month has the most sunshine in Colombo?

The month with the most sunshine is January, with an average of 9.1h of sunshine.

How many hours of sunshine does Colombo have in January?

In Colombo, Sri Lanka, the average sunshine in January is 9.1h.

When is the highest UV index in Colombo?

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

What is the UV index intensity in January in Colombo?

In Colombo, the average daily maximum UV index in January is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in January
Colombo, Sri Lanka

Average temperature in January - Colombo, Sri Lanka
  • Average high temperature in January: 30.8°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 January: 23.1°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).

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Average pressure in January
Colombo, Sri Lanka

Average pressure in January - Colombo, Sri Lanka
  • Average pressure in January: 1011.6mbar

The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).

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Average wind speed in January
Colombo, Sri Lanka

Average wind speed in January - Colombo, Sri Lanka
  • Average wind speed in January: 12.8km/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).

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Average humidity in January
Colombo, Sri Lanka

Average humidity in January - Colombo, Sri Lanka
  • Average humidity in January: 74%

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

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Average rainfall in January
Colombo, Sri Lanka

Average rainfall in January - Colombo, Sri Lanka
  • Average rainfall in January: 40mm

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

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Average rainfall days in January
Colombo, Sri Lanka

Average rainfall days in January - Colombo, Sri Lanka
  • Average rainfall days in January: 11.6 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).

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Average sea temperature in January
Colombo, Sri Lanka

Average sea temperature in January - Colombo, 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).

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Average daylight in January /
Average sunshine in January
Colombo, Sri Lanka

Average daylight in January / Average sunshine in January - Colombo, Sri Lanka
  • Average daylight in January: 11.8h

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 January: 9.1h

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

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Average sunshine days in January
Colombo, Sri Lanka

Average sunshine days in January - Colombo, Sri Lanka
  • Average sunshine days in January: 17.2 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).

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Average UV index in January
Colombo, Sri Lanka

Average UV index in January - Colombo, Sri Lanka
  • Average UV index in January: 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).

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Average cloud cover in January
Colombo, Sri Lanka

Average cloud cover in January - Colombo, Sri Lanka
  • Average cloud cover in January: 24

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

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Average visibility in January
Colombo, Sri Lanka

Average visibility in January - Colombo, Sri Lanka
  • Average visibility in January: 10km

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).

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