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 coldest period is December, when temperatures fluctuate between an average high of 27.5°C (81.5°F) and a low of 19.5°C (67.1°F).Heat index
In December, the heat index is estimated at a hot 31°C (87.8°F). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
The most humid month is December, with an average relative humidity of 84%.Rainfall
In Hiyarapitiya, in December, during 22.9 rainfall days, 118mm (4.65") of precipitation is typically accumulated. In Hiyarapitiya, Sri Lanka, during the entire year, the rain falls for 278.9 days and collects up to 1477mm (58.15") of precipitation.Daylight
December has the shortest days of the year in Hiyarapitiya, with an average of 11h and 42min of daylight.On the first day of December in Hiyarapitiya, sunrise is at 06:04 and sunset at 17:48. On the last day of the month, sunrise is at 06:19 and sunset at 18:02 +0530.
Sunshine
December has the least sunshine of the year in Hiyarapitiya, with an average of 5.7h of sunshine.UV index
January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index in Hiyarapitiya. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during December leads to these instructions:
Guard oneself from overexposure. Defence against sun injury is vital. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Hiyarapitiya?
What are the temperatures in Hiyarapitiya in December?
What is the most humid month in Hiyarapitiya?
What is the average humidity in December in Hiyarapitiya?
How much does it rain in Hiyarapitiya in December?
What is the month with the shortest days in Hiyarapitiya?
How many hours of daylight does Hiyarapitiya have in December?
When is the sunrise / sunset in December in Hiyarapitiya?
What is the month with the least sunshine in Hiyarapitiya?
How long on average sun shines in December in Hiyarapitiya?
What is the month with the highest UV index in Hiyarapitiya?
What is the UV index reading in December in Hiyarapitiya?
Average temperature in December
Hiyarapitiya, Sri Lanka
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).
- Average low temperature in December: 19.5°C
The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.1°C).
Average pressure in December
Hiyarapitiya, Sri Lanka
- Average pressure in December: 1010.5mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).
Average wind speed in December
Hiyarapitiya, Sri Lanka
- Average wind speed in December: 6.7km/h
The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).
Average humidity in December
Hiyarapitiya, Sri Lanka
- Average humidity in December: 84%
The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).
Average rainfall in December
Hiyarapitiya, Sri Lanka
- Average rainfall in December: 118mm
The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days in December
Hiyarapitiya, Sri Lanka
- Average rainfall days in December: 22.9 days
The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).
Average daylight in December /
Average sunshine in December
Hiyarapitiya, 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: 5h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Hiyarapitiya, Sri Lanka
- Average sunshine days in December: 6.8 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).
Average UV index in December
Hiyarapitiya, Sri Lanka
- Average UV index in December: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 6).
The month with the lowest UV index is October (UV index 5).
Average cloud cover in December
Hiyarapitiya, Sri Lanka
- Average cloud cover in December: 47
The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).
Average visibility in December
Hiyarapitiya, Sri Lanka
- Average visibility in December: 8km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).
