December weather forecastKelanimulla, Sri Lanka
December
Weather in December
December, the first month of the winter in Kelanimulla, is still a warm month, with an average temperature fluctuating between 23.7°C (74.7°F) and 29.9°C (85.8°F).Temperature
Kelanimulla starts December with an average high-temperature of a moderately hot 29.9°C (85.8°F), hinting at a minimal fluctuation from November. Kelanimulla experiences an average nighttime temperature of 23.7°C (74.7°F) in the month of December.Heat index
December's heat index is appraised at a very hot 37°C (98.6°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. 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 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
In Kelanimulla, the average relative humidity in December is 79%.Rainfall
In Kelanimulla, during December, the rain falls for 21.1 days and regularly aggregates up to 148mm (5.83") of precipitation. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 11h and 42min of daylight.On the first day of the month, sunrise is at 06:06 and sunset at 17:51. On the last day of December, sunrise is at 06:21 and sunset at 18:05 +0530.
Sunshine
The average sunshine in December is 6.9h.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 value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 7 transforms into these recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, Sri Lanka
- Average daylight in December: 11h and 42min
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 54min
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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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
Kelanimulla, 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).
