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
Upon the beginning of December, Kolonnawa's high-temperatures register at a moderately hot 29.9°C (85.8°F), closely mirroring the preceding month. In December, the average low-temperature is 23.7°C (74.7°F).Heat index
December's mean heat index is estimated at a torrid 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Understand that the heat index values take into account shaded locations and mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
The average relative humidity in December is 79%.Rainfall
In Kolonnawa, during December, the rain falls for 21.1 days and regularly aggregates up to 148mm (5.83") of precipitation. Throughout the year, in Kolonnawa, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.Daylight
The month with the shortest days in Kolonnawa is December, with an average of 11h and 42min of daylight.On the first day of December in Kolonnawa, 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
In December, the average sunshine is 6.9h.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 Kolonnawa, Sri Lanka. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: During December, 7 as the daily maximum UV index converts into the following advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. 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. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot is December in Kolonnawa?
What is the average humidity in December in Kolonnawa?
How much does it rain in Kolonnawa in December?
What is the month with the shortest days in Kolonnawa?
How many hours of daylight does Kolonnawa have in December?
When is the sunrise / sunset in December in Kolonnawa?
How long on average sun shines in December in Kolonnawa?
What is the month with the highest UV index in Kolonnawa?
How high is the UV index in December in Kolonnawa?
Average temperature in December
Kolonnawa, Sri Lanka
- Average high temperature in December: 29.9°C
The warmest months (with the highest average high temperature) are March and April (31.8°C).
The months with the lowest average high temperature are July and August (28.9°C).
- Average low temperature in December: 23.7°C
The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.1°C).
Average pressure in December
Kolonnawa, Sri Lanka
- Average pressure in December: 1010.4mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).
Average wind speed in December
Kolonnawa, Sri Lanka
- Average wind speed in December: 11.5km/h
The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).
Average humidity in December
Kolonnawa, Sri Lanka
- Average humidity in December: 79%
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in December
Kolonnawa, Sri Lanka
- Average rainfall in December: 148mm
The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).
Average rainfall days in December
Kolonnawa, Sri Lanka
- Average rainfall days in December: 21.1 days
The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).
Average daylight in December /
Average sunshine in December
Kolonnawa, 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: 6h and 5min
The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in December
Kolonnawa, Sri Lanka
- Average sunshine days in December: 8.3 days
The month with the most sunshine days is January (17.2 days).
The months with the least sunshine days are June and August (0.3 days).
Average UV index in December
Kolonnawa, 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
Kolonnawa, Sri Lanka
- Average cloud cover in December: 38
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in December
Kolonnawa, Sri Lanka
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
Kolonnawa, Sri Lanka
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