October weather forecast
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 October

October is a hot autumn month in Colombo, Sri Lanka, with an average temperature varying between 30°C (86°F) and 25°C (77°F).

Temperature

In October, the average high-temperature is almost the same as in September - a tropical 30°C (86°F). In Colombo, in October, the average low-temperature is 25°C (77°F).

Heat index

In October, the average heat index is estimated at a sweltering 38°C (100.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased 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 metabolic differences, clothing, pregnancy, 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 especially crucial for babies and toddlers. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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 in October is 80%.

Rainfall

In Colombo, Sri Lanka, it is raining for 27 days, with typically 237mm (9.33") of accumulated precipitation. Throughout the year, in Colombo, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Sea temperature

In October, the average sea temperature is 28.6°C (83.5°F).
Note: 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.

Daylight

In October, the average length of the day in Colombo is 11h and 58min.
On the first day of October, sunrise is at 05:58 and sunset at 18:02. On the last day of the month, sunrise is at 05:57 and sunset at 17:50 +0530.

Sunshine

In October, the average sunshine in Colombo is 7.7h.

UV index

The months with the lowest UV index are May, June, August and October, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in October transform into the following instructions:
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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in October in Colombo?

The average high-temperature, in October, in Colombo, Sri Lanka, is 30°C (86°F), while the average low-temperature is 25°C (77°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in October is estimated at 38°C (100.4°F).

What is the average humidity in October in Colombo?

In Colombo, Sri Lanka, the average relative humidity in October is 80%.

How many days does it rain in October in Colombo?

In Colombo, in October, it is raining for 27 days, with typically 237mm (9.33") of accumulated precipitation.

What is the water temperature in October in Colombo?

In October, the average sea temperature in Colombo, Sri Lanka, 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.

What is the average length of the day in October in Colombo?

The average day length in October in Colombo, Sri Lanka, is 11h and 58min.

What time are sunrise and sunset in October in Colombo?

On the first day of October, sunrise is at 05:58 and sunset at 18:02. On the last day of the month, sunrise is at 05:57 and sunset at 17:50 +0530.

How long on average sun shines in October in Colombo?

In Colombo, the average sunshine duration in October is 7.7h.

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

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index.

What is the UV index reading in October in Colombo?

In October, the average daily maximum UV index in Colombo is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.

Average temperature in October
Colombo, Sri Lanka

Average temperature in October - Colombo, Sri Lanka
  • Average high temperature in October: 30°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 October: 25°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 October
Colombo, Sri Lanka

Average pressure in October - Colombo, Sri Lanka
  • Average pressure in October: 1009.9mbar

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 October
Colombo, Sri Lanka

Average wind speed in October - Colombo, Sri Lanka
  • Average wind speed in October: 10.2km/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 October
Colombo, Sri Lanka

Average humidity in October - Colombo, Sri Lanka
  • Average humidity in October: 80%

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 October
Colombo, Sri Lanka

Average rainfall in October - Colombo, Sri Lanka
  • Average rainfall in October: 237mm

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 October
Colombo, Sri Lanka

Average rainfall days in October - Colombo, Sri Lanka
  • Average rainfall days in October: 27 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 October
Colombo, Sri Lanka

Average sea temperature in October - Colombo, 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).

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

Average daylight in October / Average sunshine in October - Colombo, Sri Lanka
  • Average daylight in October: 12h and 0min

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 October: 7h and 4min

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 October
Colombo, Sri Lanka

Average sunshine days in October - Colombo, Sri Lanka
  • Average sunshine days in October: 1.7 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 October
Colombo, Sri Lanka

Average UV index in October - Colombo, Sri Lanka
  • Average UV index in October: 6

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 October
Colombo, Sri Lanka

Average cloud cover in October - Colombo, Sri Lanka
  • Average cloud cover in October: 49

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 October
Colombo, Sri Lanka

Average visibility in October - Colombo, Sri Lanka
  • Average visibility in October: 9km

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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