March 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 March

March, the first month of the spring, in Colombo, is still a hot month, with average temperature fluctuating between 31.8°C (89.2°F) and 24.3°C (75.7°F).

Temperature

The warmest months are March and April, with an average high-temperature of 31.8°C (89.2°F).

Heat index

In March, the average heat index is calculated to be an extremely hot 42°C (107.6°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like wind, pregnancy, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In Colombo, the average relative humidity is 76%.

Rainfall

In Colombo, during 19.8 rainfall days, 66mm (2.6") of precipitation is typically accumulated. In Colombo, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Sea temperature

In Colombo, Sri Lanka, the average seawater temperature in March is 29.1°C (84.4°F).
Note: 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 March is 12.1h.

Sunshine

In March, the average sunshine in Colombo is 9h.

UV index

Months with the highest UV index in Colombo are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In March, the average maximum UV index of 7 translate into the following recommendations:
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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the warmest month in Colombo?

Warmest months in Colombo, Sri Lanka, are March and April, with an average high-temperature of 31.8°C (89.2°F).

What is the temperature in March in Colombo?

The average high-temperature, in March, is 31.8°C (89.2°F), while the average low-temperature is 24.3°C (75.7°F). In March, 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 42°C (107.6°F).

What is the average humidity in March in Colombo?

In March, the average relative humidity in Colombo, Sri Lanka, is 76%.

How many days does it rain in March in Colombo?

In Colombo, during March, the rain falls for 19.8 days and regularly aggregates up to 66mm (2.6") of precipitation.

What is the water temperature in March in Colombo?

In Colombo, Sri Lanka, the average seawater temperature in March is 29.1°C (84.4°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 March?

The average length of the day in March in Colombo is 12.1h.

How long on average sun shines in March in Colombo?

The average sunshine in March is 9h.

What is the month with the highest UV index in Colombo?

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

How high is the UV index in March in Colombo?

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

Average temperature in March
Colombo, Sri Lanka

Average temperature in March - Colombo, Sri Lanka
  • Average high temperature in March: 31.8°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 March: 24.3°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 March
Colombo, Sri Lanka

Average pressure in March - Colombo, Sri Lanka
  • Average pressure in March: 1010.7mbar

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 March
Colombo, Sri Lanka

Average wind speed in March - Colombo, Sri Lanka
  • Average wind speed in March: 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 March
Colombo, Sri Lanka

Average humidity in March - Colombo, Sri Lanka
  • Average humidity in March: 76%

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 March
Colombo, Sri Lanka

Average rainfall in March - Colombo, Sri Lanka
  • Average rainfall in March: 66mm

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 March
Colombo, Sri Lanka

Average rainfall days in March - Colombo, Sri Lanka
  • Average rainfall days in March: 19.8 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 March
Colombo, Sri Lanka

Average sea temperature in March - Colombo, Sri Lanka
  • Average sea temperature in March: 29.1°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 March /
Average sunshine in March
Colombo, Sri Lanka

Average daylight in March / Average sunshine in March - Colombo, Sri Lanka
  • Average daylight in March: 12.1h

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 March: 9h

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 March
Colombo, Sri Lanka

Average sunshine days in March - Colombo, Sri Lanka
  • Average sunshine days in March: 8.2 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 March
Colombo, Sri Lanka

Average UV index in March - Colombo, Sri Lanka
  • Average UV index in March: 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 March
Colombo, Sri Lanka

Average cloud cover in March - Colombo, Sri Lanka
  • Average cloud cover in March: 30

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 March
Colombo, Sri Lanka

Average visibility in March - Colombo, Sri Lanka
  • Average visibility in March: 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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