December weather forecast
Kollupitiya, Sri Lanka

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Weather in December

The first month of the winter, December, is also a moderately hot month in Kollupitiya, Sri Lanka, with an average temperature varying between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

In December, Kollupitiya experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 30.1°C (86.2°F) in November to a warm 29.9°C (85.8°F). During December, the nighttime temperature in Kollupitiya averages to a still moderately hot 23.7°C (74.7°F).

Heat index

For most parts of December, the heat index is evaluated at a fiery hot 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. 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.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in December is 79%.

Rainfall

In Kollupitiya, in December, it is raining for 21.1 days, with typically 148mm (5.83") of accumulated precipitation. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Kollupitiya.
On the first day of the month, sunrise is at 06:07 and sunset at 17:52. On the last day of December, sunrise is at 06:21 and sunset at 18:05 +0530.

Sunshine

In December, the average sunshine is 6.9h.

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 of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 7 during December translates into the following guidance:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.

Frequently asked questions

Is it hot in Kollupitiya during December?

The average high-temperature, in December, in Kollupitiya, is 29.9°C (85.8°F), while the average low-temperature is 23.7°C (74.7°F). In December, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is evaluated at 37°C (98.6°F).

What is the average humidity in December in Kollupitiya?

In Kollupitiya, Sri Lanka, the average relative humidity in December is 79%.

How many days does it rain in December in Kollupitiya?

In December, in Kollupitiya, Sri Lanka, the rain falls for 21.1 days. Throughout December, 148mm (5.83") of precipitation is accumulated.

What is the month with the shortest days in Kollupitiya?

With an average of 11h and 42min of daylight, December has the shortest days of the year in Kollupitiya, Sri Lanka.

How many hours of daylight does Kollupitiya have in December?

In December, the average day length in Kollupitiya is 11h and 44min.

What time are sunrise and sunset in December in Kollupitiya?

On the first day of December in Kollupitiya, Sri Lanka, sunrise is at 06:07 and sunset at 17:52. On the last day of the month, sunrise is at 06:21 and sunset at 18:05 +0530.

How many hours of sunshine does Kollupitiya have in December?

In Kollupitiya, Sri Lanka, the average sunshine duration in December is 6.9h.

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

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

What is the UV index intensity in December in Kollupitiya?

In Kollupitiya, Sri Lanka, the average daily maximum UV index in December is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in December
Kollupitiya, Sri Lanka

Average temperature in December - Kollupitiya, Sri Lanka
  • Average high temperature in December: 29.9°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 December: 23.7°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).

Average pressure in December
Kollupitiya, Sri Lanka

Average pressure in December - Kollupitiya, Sri Lanka
  • Average pressure in December: 1010.4mbar

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

Average wind speed in December
Kollupitiya, Sri Lanka

Average wind speed in December - Kollupitiya, Sri Lanka
  • Average wind speed in December: 11.5km/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).

Average humidity in December
Kollupitiya, Sri Lanka

Average humidity in December - Kollupitiya, Sri Lanka
  • Average humidity in December: 79%

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%).

Average rainfall in December
Kollupitiya, Sri Lanka

Average rainfall in December - Kollupitiya, Sri Lanka
  • Average rainfall in December: 148mm

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

Average rainfall days in December
Kollupitiya, Sri Lanka

Average rainfall days in December - Kollupitiya, Sri Lanka
  • Average rainfall days in December: 21.1 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).

Average daylight in December /
Average sunshine in December
Kollupitiya, Sri Lanka

Average daylight in December / Average sunshine in December - Kollupitiya, Sri Lanka
  • Average daylight in December: 11h and 4min

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 December: 6h and 5min

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).

Average sunshine days in December
Kollupitiya, Sri Lanka

Average sunshine days in December - Kollupitiya, Sri Lanka
  • Average sunshine days in December: 8.3 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).

Average UV index in December
Kollupitiya, Sri Lanka

Average UV index in December - Kollupitiya, Sri Lanka
  • Average UV index in December: 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).

Average cloud cover in December
Kollupitiya, Sri Lanka

Average cloud cover in December - Kollupitiya, Sri Lanka
  • Average cloud cover in December: 38

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

Average visibility in December
Kollupitiya, Sri Lanka

Average visibility in December - Kollupitiya, Sri Lanka
  • Average visibility in December: 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).

Kollupitiya, Sri Lanka

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