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
Lowest temperatures are observed in January and December, averaging a high-temperature of 29.3°C (84.7°F).Heat index
The heat index in December is appraised at a sweltering 37°C (98.6°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The most humid month in Nilaveli is December, with an average relative humidity of 84%.Rainfall
In Nilaveli, in December, during 22.9 rainfall days, 127mm (5") of precipitation is typically accumulated. Throughout the year, in Nilaveli, Sri Lanka, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.Daylight
With an average of 11h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:04 and sunset at 17:44. On the last day of December, sunrise is at 06:19 and sunset at 17:57 +0530.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
January, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Nilaveli. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 6 in December transforms into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Nilaveli?
How hot is it in Nilaveli in December?
What is the most humid month in Nilaveli?
What is the average humidity in December in Nilaveli?
How much does it rain in Nilaveli in December?
What is the month with the shortest days in Nilaveli?
How many hours of daylight does Nilaveli have in December?
What time are sunrise and sunset in December in Nilaveli?
What is the month with the least sunshine in Nilaveli?
How long on average sun shines in December in Nilaveli?
What are the months with the lowest UV index in Nilaveli?
What is the UV index intensity in December in Nilaveli?
Average temperature in December
Nilaveli, 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).
Average pressure in December
Nilaveli, 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).
Average wind speed in December
Nilaveli, 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).
Average humidity in December
Nilaveli, 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%).
Average rainfall in December
Nilaveli, 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).
Average rainfall days in December
Nilaveli, 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).
Average daylight in December /
Average sunshine in December
Nilaveli, 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 36min).
- 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).
Average sunshine days in December
Nilaveli, 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).
Average UV index in December
Nilaveli, 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).
Average cloud cover in December
Nilaveli, 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).
Average visibility in December
Nilaveli, 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).
