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
During the coldest month, December, temperatures average a high of 27.5°C (81.5°F) and a low of 19.5°C (67.1°F).Heat index
December's heat index is evaluated at a tropical 31°C (87.8°F). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
December is the most humid month, with an average relative humidity of 84%.Rainfall
In Dehianga, during December, the rain falls for 22.9 days and regularly aggregates up to 118mm (4.65") of precipitation. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.Daylight
The month with the shortest days in Dehianga is December, with an average of 11h and 42min of daylight.On the first day of December, 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, 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 Dehianga. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 6 during December leads to these advisories:
Deter overexposure. Protecting against the sun's effects is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Dehianga?
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Dehianga have in December?
When are sunrise and sunset in December in Dehianga?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the highest UV index?
What is the UV index reading in December?
Average temperature in December
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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
Dehianga, 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).
Dehianga, Sri Lanka
Weather forecast for your location
2. Allow the app to use your location