March weather forecast
Colombo, Sri Lanka

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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

As spring approaches, March in Colombo witnesses escalating temperature highs and lows, along with increasing daylight hours to 12.1 a day. A significant uptick in the amount of rainfall to 66mm (2.6") means more wet days in this month. Furthermore, the relative humidity continues to rise, hitting 76%, making it warmer and more humid than the previous months. March’s heightened moisture content can affect visibility, which remains steady at 10km (6.2mi). Kite enthusiasts may find the reduced wind speed less exhilarating but more manageable.

Temperature

Colombo's highest average temperatures are recorded in March and April, reaching a high of 31.8°C (89.2°F).

Heat index

March's average heat index is computed to be a blisteringly hot 42°C (107.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in March is 76%.

Rainfall

In Colombo, Sri Lanka, during March, the rain falls for 19.8 days and regularly aggregates up to 66mm (2.6") of precipitation. 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, in March, the average water temperature is 29.1°C (84.4°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 March is 12h and 5min.
On the first day of the month, sunrise is at 06:22 and sunset at 18:22. On the last day of March, sunrise is at 06:09 and sunset at 18:20 +0530.

Sunshine

In March, the average sunshine is 9h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 7 during March leads to these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
Updated: Feb 6, 2024 | Published by: Weather Atlas | Resources

Frequently asked questions

What time of the year is the hottest in Colombo?

The warmest period is usually observed in March and April, with the average high-temperature peaking at 31.8°C (89.2°F).

How hot is March in Colombo?

In March, in Colombo, the average high-temperature is 31.8°C (89.2°F), and the average low-temperature is 24.3°C (75.7°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in March is computed to be 42°C (107.6°F).

What is the average humidity in March in Colombo?

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

How much does it rain in Colombo in March?

In March, the rain falls for 19.8 days. Throughout March, 66mm (2.6") of precipitation is accumulated.

What is the sea water temperature in March in Colombo?

In Colombo, in March, the average water temperature is 29.1°C (84.4°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 March in Colombo?

The average day length in March is 12h and 5min.

When is the sunrise / sunset in March in Colombo?

In March, on the first day of the month, sunrise is at 06:22 and sunset at 18:22. On the last day of the month, in Colombo, Sri Lanka, sunrise is at 06:09 and sunset at 18:20 +0530.

How many hours of sunshine does Colombo have in March?

In March, the average sunshine duration is 9h.

When is the highest UV index in Colombo?

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, Sri Lanka.

What is the UV index intensity in March in Colombo?

In March, the average daily maximum UV index in Colombo, Sri Lanka, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.

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).
The 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%

The months with the highest relative humidity are June, July and August (83%).
The 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: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).

  • Average sunshine in March: 9h and 0min

The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

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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).
The 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

The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The 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

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

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Colombo, Sri Lanka

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