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
Hiriwadunna experiences the lowest of its temperatures in January and December, when the average high-temperatures rise to 29.3°C (84.7°F).Heat index
December's mean heat index is appraised at a fiery hot 37°C (98.6°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Records show heat index calculations are tailored for shaded regions and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
December is the most humid month, with an average relative humidity of 84%.Rainfall
In December, the rain falls for 22.9 days. Throughout December, 127mm (5") of precipitation is accumulated. In Hiriwadunna, during the entire year, the rain falls for 196.8 days and collects up to 943mm (37.13") of precipitation.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 06:05 and sunset at 17:46. On the last day of December, in Hiriwadunna, sunrise is at 06:20 and sunset at 18:00 +0530.
Sunshine
December has the least sunshine of the year in Hiriwadunna, 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 Hiriwadunna. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 6 during December leads to these advisories:
Take precautions against overexposure. Protection against sun damage is needed. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Hiriwadunna?
Is it hot in Hiriwadunna during December?
What is the most humid month in Hiriwadunna?
What is the average humidity in December in Hiriwadunna?
How many days does it rain in December in Hiriwadunna?
What is the month with the shortest days in Hiriwadunna?
What is the average length of the day in December in Hiriwadunna?
When is the sunrise / sunset in December in Hiriwadunna?
What is the month with the least sunshine in Hiriwadunna?
How many hours of sunshine does Hiriwadunna have in December?
What are the months with the lowest UV index in Hiriwadunna?
What is the UV index intensity in December in Hiriwadunna?
Average temperature in December
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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 42min).
- 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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
Hiriwadunna, 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).
