December weather forecastRanwala, Sri Lanka
December
Weather in December
December, the first month of the winter in Ranwala, is also a moderately hot month, with temperature in the range of an average low of 19.9°C (67.8°F) and an average high of 28.4°C (83.1°F).Temperature
As November transitions into December, Ranwala records an average high-temperature of a still moderately hot 28.4°C (83.1°F), showing a gentle shift from the preceding month. In December, the recorded average low-temperature in Ranwala is an enjoyable 19.9°C (67.8°F).Heat index
During December, the heat index is computed to be a hot 34°C (93.2°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. 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 'real feel' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In Ranwala, Sri Lanka, the average relative humidity in December is 85%.Rainfall
In Ranwala, during December, the rain falls for 25.6 days and regularly aggregates up to 209mm (8.23") of precipitation. In Ranwala, during the entire year, the rain falls for 317.7 days and collects up to 2467mm (97.13") of precipitation.Daylight
With an average of 11h and 42min of daylight, December has the shortest days of the year in Ranwala, Sri Lanka.On the first day of December, sunrise is at 06:06 and sunset at 17:50. On the last day of the month, sunrise is at 06:20 and sunset at 18:04 +0530.
Sunshine
The month with the least sunshine is December, with an average of 6h of sunshine.UV index
The months with the highest UV index are January through August, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 6 in December suggests the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 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. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ranwala, Sri Lanka
- Average high temperature in December: 28.4°C
The warmest month (with the highest average high temperature) is March (31.1°C).
The months with the lowest average high temperature are June and July (27.3°C).
- Average low temperature in December: 19.9°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 (18.7°C).
Average pressure in December
Ranwala, 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
Ranwala, Sri Lanka
- Average wind speed in December: 4.3km/h
The windiest month (with the highest average wind speed) is July (8.8km/h).
The calmest months (with the lowest average wind speed) are February and March (3.9km/h).
Average humidity in December
Ranwala, Sri Lanka
- Average humidity in December: 85%
The months with the highest relative humidity are May and June (88%).
The months with the lowest relative humidity are January and February (80%).
Average rainfall in December
Ranwala, Sri Lanka
- Average rainfall in December: 209mm
The wettest month (with the highest rainfall) is October (357mm).
The driest month (with the least rainfall) is January (85mm).
Average rainfall days in December
Ranwala, Sri Lanka
- Average rainfall days in December: 25.6 days
The month with the highest number of rainy days is May (29.8 days).
The month with the least rainy days is January (18.9 days).
Average daylight in December /
Average sunshine in December
Ranwala, Sri Lanka
- Average daylight in December: 11h and 42min
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 0min
The month with the most sunshine is April (Average sunshine: 8h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Ranwala, Sri Lanka
- Average sunshine days in December: 3.6 days
The month with the most sunshine days is January (9.2 days).
The month with the least sunshine days is April (0.2 days).
Average UV index in December
Ranwala, Sri Lanka
- Average UV index in December: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, November and December (UV index 6).
The months with the lowest UV index are September and October (UV index 5).
Average cloud cover in December
Ranwala, Sri Lanka
- Average cloud cover in December: 47
The month with the most cloud cover is June (Cloud cover 65).
The month with the least cloud cover is January (Cloud cover 33).
Average visibility in December
Ranwala, Sri Lanka
- Average visibility in December: 8km
The months with the highest visibility are January, February, March, June, July, August and December (8km).
The months with the lowest visibility are April, May, September, October and November (7km).
