January weather forecast
Kolonnawa, Sri Lanka

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Weather in January

January in Kolonnawa, Sri Lanka, is a hot winter month, with an average temperature fluctuating between 23.1°C (73.6°F) and 30.8°C (87.4°F).

Temperature

January's onset records a minor alteration in the average high-temperature to a hot 30.8°C (87.4°F) from December's 29.9°C (85.8°F). January brings with it a nighttime average temperature of 23.1°C (73.6°F) in Kolonnawa.

Heat index

Throughout January, the heat index is estimated at a sweltering 38°C (100.4°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

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

Rainfall

January is the month with the least rainfall in Kolonnawa. Rain falls for 11.6 days and accumulates 40mm (1.57") of precipitation.

Daylight

In January, the average length of the day is 11h and 46min.
On the first day of January in Kolonnawa, Sri Lanka, sunrise is at 06:21 and sunset at 18:05. On the last day of the month, sunrise is at 06:28 and sunset at 18:18 +0530.

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. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 7 during January translates into these guidelines:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

How hot is January in Kolonnawa?

Kolonnawa in January has an average high-temperature of 30.8°C (87.4°F) and an average low-temperature of 23.1°C (73.6°F). In January, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is estimated at 38°C (100.4°F).

What are the least humid months in Kolonnawa?

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

What is the average humidity in January in Kolonnawa?

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

What is the driest month in Kolonnawa?

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

How much does it rain in Kolonnawa in January?

In January, the rain falls for 11.6 days. Throughout January, 40mm (1.57") of precipitation is accumulated.

What is the average length of the day in January in Kolonnawa?

The average day length in January is 11h and 46min.

When is the sunrise / sunset in January in Kolonnawa?

On the first day of January in Kolonnawa, sunrise is at 06:21 and sunset at 18:05. On the last day of the month, sunrise is at 06:28 and sunset at 18:18 +0530.

What month has the most sunshine in Kolonnawa?

With an average of 9.1h of sunshine, January has the most sunshine of the year in Kolonnawa, Sri Lanka.

How long on average sun shines in January in Kolonnawa?

In Kolonnawa, the average sunshine duration in January is 9.1h.

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

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

What is the UV index intensity in January in Kolonnawa?

The average daily maximum UV index in January in Kolonnawa, Sri Lanka, is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.

Average temperature in January
Kolonnawa, Sri Lanka

Average temperature in January - Kolonnawa, 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).
The 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
Kolonnawa, Sri Lanka

Average pressure in January - Kolonnawa, 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
Kolonnawa, Sri Lanka

Average wind speed in January - Kolonnawa, 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
Kolonnawa, Sri Lanka

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

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 January
Kolonnawa, Sri Lanka

Average rainfall in January - Kolonnawa, 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
Kolonnawa, Sri Lanka

Average rainfall days in January - Kolonnawa, 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 daylight in January /
Average sunshine in January
Kolonnawa, Sri Lanka

Average daylight in January / Average sunshine in January - Kolonnawa, Sri Lanka
  • Average daylight in January: 11h and 5min

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 January: 9h and 1min

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 January
Kolonnawa, Sri Lanka

Average sunshine days in January - Kolonnawa, Sri Lanka
  • Average sunshine days in January: 17.2 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 January
Kolonnawa, Sri Lanka

Average UV index in January - Kolonnawa, Sri Lanka
  • Average UV index in January: 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 January
Kolonnawa, Sri Lanka

Average cloud cover in January - Kolonnawa, 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
Kolonnawa, Sri Lanka

Average visibility in January - Kolonnawa, Sri Lanka
  • Average visibility in January: 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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Kolonnawa, Sri Lanka

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