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 time of the year is December, with temperatures averaging a high of 28.6°C (83.5°F) and a low of 20.4°C (68.7°F).Heat index
December's average heat index is estimated at a tropical 34°C (93.2°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The most humid month is December, with an average relative humidity of 83%.Rainfall
In December, the rain falls for 20.9 days. Throughout December, 113mm (4.45") of precipitation is accumulated. In Selagama, Sri Lanka, during the entire year, the rain falls for 217.7 days and collects up to 1165mm (45.87") of precipitation.Daylight
With an average of 11h and 42min of daylight, December has the shortest days of the year in Selagama.On the first day of December in Selagama, sunrise is at 06:05 and sunset at 17:48. On the last day of the month, sunrise is at 06:19 and sunset at 18:01 +0530.
Sunshine
The month with the least sunshine in Selagama is December, with an average of 5.7h of sunshine.UV index
The months with the lowest UV index in Selagama are January, February, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 6 in December leads to these recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Selagama?
How hot does it get in Selagama in December?
What is the most humid month in Selagama?
What is the average humidity in December in Selagama?
How much does it rain in Selagama in December?
What is the month with the shortest days in Selagama?
What is the average length of the day in December in Selagama?
When is the sunrise / sunset in December in Selagama?
What is the month with the least sunshine in Selagama?
How long on average sun shines in December in Selagama?
What is the month with the lowest UV index in Selagama?
How high is the UV index in December in Selagama?
Average temperature in December
Selagama, Sri Lanka
- Average high temperature in December: 28.6°C
The warmest month (with the highest average high temperature) is April (32.9°C).
The month with the lowest average high temperature is December (28.6°C).
- Average low temperature in December: 20.4°C
The month with the highest average low temperature is May (23°C).
The coldest month (with the lowest average low temperature) is February (18.9°C).
Average pressure in December
Selagama, Sri Lanka
- Average pressure in December: 1010.5mbar
The month with the highest atmospheric pressure is January (1011.9mbar).
The month with the lowest atmospheric pressure is June (1007.9mbar).
Average wind speed in December
Selagama, Sri Lanka
- Average wind speed in December: 7.8km/h
The windiest month (with the highest average wind speed) is June (16.5km/h).
The calmest month (with the lowest average wind speed) is April (5.6km/h).
Average humidity in December
Selagama, Sri Lanka
- Average humidity in December: 83%
The month with the highest relative humidity is December (83%).
The months with the lowest relative humidity are March and September (72%).
Average rainfall in December
Selagama, Sri Lanka
- Average rainfall in December: 113mm
The wettest month (with the highest rainfall) is October (267mm).
The driest month (with the least rainfall) is June (29mm).
Average rainfall days in December
Selagama, Sri Lanka
- Average rainfall days in December: 20.9 days
The month with the highest number of rainy days is April (24.7 days).
The month with the least rainy days is February (11.8 days).
Average daylight in December /
Average sunshine in December
Selagama, 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: 5h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Selagama, Sri Lanka
- Average sunshine days in December: 8.2 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is April (4 days).
Average UV index in December
Selagama, Sri Lanka
- Average UV index in December: 6
The months with the highest UV index are March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, October, November and December (UV index 6).
Average cloud cover in December
Selagama, Sri Lanka
- Average cloud cover in December: 46
The months with the most cloud cover are November and December (Cloud cover 46).
The month with the least cloud cover is March (Cloud cover 24).
Average visibility in December
Selagama, Sri Lanka
- Average visibility in December: 8km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, November and December (8km).
