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
Weather in December
Temperature
The advent of December denotes an average high-temperature of a still moderately hot 27.5°C (81.5°F), subtly different from November's 28.4°C (83.1°F). Throughout December, Ariyalai records a steady low-temperature average of 26.1°C (79°F), a minor decrease from its daytime counterpart.Heat index
The heat index value for December is computed to be a hot 31°C (87.8°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 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.
Humidity
In December, the average relative humidity in Ariyalai is 78%.Rainfall
In Ariyalai, during December, the rain falls for 20 days and regularly aggregates up to 140mm (5.51") of precipitation. Throughout the year, there are 148.6 rainfall days, and 769mm (30.28") of precipitation is accumulated.Daylight
December has the shortest days of the year in Ariyalai, with an average of 11h and 36min of daylight.On the first day of December, sunrise is at 06:10 and sunset at 17:46. On the last day of the month, sunrise is at 06:25 and sunset at 17:59 +0530.
Sunshine
December has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Ariyalai. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: In December, a daily UV index of 7 turns into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What is the temperature in December in Ariyalai?
What is the average humidity in December in Ariyalai?
How many days does it rain in December in Ariyalai?
What is the month with the shortest days in Ariyalai?
How many hours of daylight does Ariyalai have in December?
What time are sunrise and sunset in December in Ariyalai?
What is the month with the least sunshine in Ariyalai?
How long on average sun shines in December in Ariyalai?
When is the highest UV index in Ariyalai?
What is the UV index reading in December in Ariyalai?
Average temperature in December
Ariyalai, Sri Lanka
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in December: 26.1°C
The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).
Average pressure in December
Ariyalai, Sri Lanka
- Average pressure in December: 1010.9mbar
The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).
Average wind speed in December
Ariyalai, Sri Lanka
- Average wind speed in December: 23.1km/h
The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).
Average humidity in December
Ariyalai, Sri Lanka
- Average humidity in December: 78%
The months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).
Average rainfall in December
Ariyalai, Sri Lanka
- Average rainfall in December: 140mm
The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).
Average rainfall days in December
Ariyalai, Sri Lanka
- Average rainfall days in December: 20 days
The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).
Average daylight in December /
Average sunshine in December
Ariyalai, Sri Lanka
- Average daylight in December: 11h and 4min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Ariyalai, Sri Lanka
- Average sunshine days in December: 7 days
The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).
Average UV index in December
Ariyalai, Sri Lanka
- Average UV index in December: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).
Average cloud cover in December
Ariyalai, Sri Lanka
- Average cloud cover in December: 47
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).
Average visibility in December
Ariyalai, Sri Lanka
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Ariyalai, Sri Lanka
Weather forecast for your location
2. Allow the app to use your location
