Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The unfolding of December shows an average high-temperature of a moderately hot 29.9°C (85.8°F), indicating a slight variance from November's 30.2°C (86.4°F). The mean low-temperature during December nights in Welikada is 23.7°C (74.7°F).Heat index
The heat index for December is calculated to be a torrid 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are primarily vital for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.
Humidity
In December, the average relative humidity is 79%.Rainfall
In December, in Welikada, the rain falls for 20.3 days. Throughout December, 139mm (5.47") of precipitation is accumulated. In Welikada, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.Daylight
December has the shortest days of the year in Welikada, with an average of 11h and 42min of daylight.On the first day of December in Welikada, 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.
Sunshine
The average sunshine in December is 7h.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 in Welikada. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 7 during December leads to these instructions:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Welikada during December?
What is the average humidity in December in Welikada?
How much does it rain in Welikada in December?
What is the month with the shortest days in Welikada?
How many hours of daylight does Welikada have in December?
What time are sunrise and sunset in December in Welikada?
How long on average sun shines in December in Welikada?
What is the month with the highest UV index in Welikada?
How high is the UV index in December in Welikada?
Average temperature in December
Welikada, Sri Lanka
- Average high temperature in December: 29.9°C
The warmest month (with the highest average high temperature) is March (32.1°C).
The month with the lowest average high temperature is July (29.2°C).
- Average low temperature in December: 23.7°C
The month with the highest average low temperature is May (26.4°C).
The coldest month (with the lowest average low temperature) is January (22.8°C).
Average pressure in December
Welikada, Sri Lanka
- Average pressure in December: 1010.5mbar
The month with the highest atmospheric pressure is January (1011.7mbar).
The months with the lowest atmospheric pressure are May and June (1008.4mbar).
Average wind speed in December
Welikada, Sri Lanka
- Average wind speed in December: 14.1km/h
The windiest month (with the highest average wind speed) is June (18.3km/h).
The calmest month (with the lowest average wind speed) is March (9.1km/h).
Average humidity in December
Welikada, Sri Lanka
- Average humidity in December: 79%
The months with the highest relative humidity are June, July and August (82%).
The months with the lowest relative humidity are January and February (73%).
Average rainfall in December
Welikada, Sri Lanka
- Average rainfall in December: 139mm
The wettest month (with the highest rainfall) is June (231mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days in December
Welikada, Sri Lanka
- Average rainfall days in December: 20.3 days
The month with the highest number of rainy days is August (28.4 days).
The month with the least rainy days is January (9.7 days).
Average daylight in December /
Average sunshine in December
Welikada, 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: 7h and 0min
The months with the most sunshine are January, February, March and April (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in December
Welikada, Sri Lanka
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is August (1.2 days).
Average UV index in December
Welikada, 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
Welikada, Sri Lanka
- Average cloud cover in December: 36
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 21).
Average visibility in December
Welikada, Sri Lanka
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, June, July, September and December (10km).
The months with the lowest visibility are May, August, October and November (9km).
