December weather forecast
Sigiriya, Sri Lanka

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Weather in December

Concluding the climatic tale of Sigiriya, Sri Lanka, December ends the year with a cool note. The temperatures further reduce, settling to a high of 29.3°C (84.7°F). The rainfall decreases to 127mm (5"), and the days are comfortably cooler. However, the month retains a high relative humidity of 84%, and an increase in cloud cover at 56%. Despite lesser daylight hours, the weather remains enjoyable. A light jacket could come in handy to cope with the cooler temperatures in the evenings.

Temperature

The lowest level of Sigiriya's temperatures is noted during January and December, averaging a high-temperature of 29.3°C (84.7°F).

Heat index

In December, the average heat index is computed to be a very hot 37°C (98.6°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

With an average relative humidity of 84%, December is the most humid month.

Rainfall

In Sigiriya, in December, it is raining for 22.9 days, with typically 127mm (5") of accumulated precipitation. In Sigiriya, during the entire year, the rain falls for 196.8 days and collects up to 943mm (37.13") of precipitation.

Daylight

December has the shortest days of the year in Sigiriya, Sri Lanka, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:05 and sunset at 17:46. On the last day of December, in Sigiriya, sunrise is at 06:19 and sunset at 18:00 +0530.

Sunshine

With an average of 4.9h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in December transforms into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

What is the coldest time of year in Sigiriya?

January and December represent the coldest period, with an average high-temperature of 29.3°C (84.7°F).

How hot is it in Sigiriya in December?

The average high-temperature, in December, in Sigiriya, is 29.3°C (84.7°F), while the average low-temperature is 21.4°C (70.5°F). In December, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 37°C (98.6°F).

What is the most humid month in Sigiriya?

With an average relative humidity of 84%, December is the most humid month in Sigiriya.

What is the average humidity in December in Sigiriya?

In December, the average relative humidity in Sigiriya is 84%.

How much does it rain in Sigiriya in December?

In Sigiriya, Sri Lanka, in December, it is raining for 22.9 days, with typically 127mm (5") of accumulated precipitation.

What is the month with the shortest days in Sigiriya?

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

What is the average length of the day in December in Sigiriya?

In December, the average day length in Sigiriya is 11h and 40min.

When are sunrise and sunset in December in Sigiriya?

In December, on the first day of the month, sunrise is at 06:05 and sunset at 17:46. On the last day of the month, sunrise is at 06:19 and sunset at 18:00 +0530.

What is the month with the least sunshine in Sigiriya?

The month with the least sunshine is December, with an average of 4.9h of sunshine.

How long on average sun shines in December in Sigiriya?

The average sunshine duration in December is 4.9h.

When is the lowest UV index in Sigiriya?

January, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Sigiriya.

What is the UV index intensity in December in Sigiriya?

In December, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Sigiriya, Sri Lanka

Average temperature in December - Sigiriya, Sri Lanka
  • Average high temperature in December: 29.3°C

The warmest month (with the highest average high temperature) is April (34.9°C).
The months with the lowest average high temperature are January and December (29.3°C).

  • Average low temperature in December: 21.4°C

The month with the highest average low temperature is June (24.8°C).
The coldest months (with the lowest average low temperature) are January and February (20°C).

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Average pressure in December
Sigiriya, Sri Lanka

Average pressure in December - Sigiriya, Sri Lanka
  • Average pressure in December: 1010.6mbar

The month with the highest atmospheric pressure is January (1012mbar).
The month with the lowest atmospheric pressure is June (1007.5mbar).

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Average wind speed in December
Sigiriya, Sri Lanka

Average wind speed in December - Sigiriya, Sri Lanka
  • Average wind speed in December: 9.1km/h

The windiest month (with the highest average wind speed) is June (23.8km/h).
The calmest month (with the lowest average wind speed) is April (7.1km/h).

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Average humidity in December
Sigiriya, Sri Lanka

Average humidity in December - Sigiriya, Sri Lanka
  • Average humidity in December: 84%

The month with the highest relative humidity is December (84%).
The months with the lowest relative humidity are June, July, August and September (67%).

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Average rainfall in December
Sigiriya, Sri Lanka

Average rainfall in December - Sigiriya, Sri Lanka
  • Average rainfall in December: 127mm

The wettest month (with the highest rainfall) is October (214mm).
The driest month (with the least rainfall) is June (15mm).

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Average rainfall days in December
Sigiriya, Sri Lanka

Average rainfall days in December - Sigiriya, Sri Lanka
  • Average rainfall days in December: 22.9 days

The month with the highest number of rainy days is November (24.1 days).
The month with the least rainy days is June (7.8 days).

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

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

The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in December
Sigiriya, Sri Lanka

Average sunshine days in December - Sigiriya, Sri Lanka
  • Average sunshine days in December: 5.9 days

The month with the most sunshine days is July (16 days).
The month with the least sunshine days is November (4.2 days).

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Average UV index in December
Sigiriya, Sri Lanka

Average UV index in December - Sigiriya, Sri Lanka
  • Average UV index in December: 6

The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, November and December (UV index 6).

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Average cloud cover in December
Sigiriya, Sri Lanka

Average cloud cover in December - Sigiriya, Sri Lanka
  • Average cloud cover in December: 56

The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is May (Cloud cover 26).

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Average visibility in December
Sigiriya, Sri Lanka

Average visibility in December - Sigiriya, Sri Lanka
  • Average visibility in December: 7km

The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January and December (7km).

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Sigiriya, Sri Lanka

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