December Weather in Horana South, Sri Lanka

Last updated: August 31, 2025

In December, the average temperature in Horana South, Sri Lanka hovers around 27°C (80°F), with a pleasant minimum of 20°C (69°F) and occasional peaks reaching 33°C (92°F). Expect a fair amount of rainfall, with 207 mm (8.2 in) of precipitation spread over 19 days, contributing to the region's average humidity of 80%.

December Temperature in Horana South

In December in Horana South, the average temperature is 27°C (80°F). Maximum can reach 33°C (92°F) and minimum can be as low as 20°C (69°F). This mild climate makes it an ideal time for traveling and exploring the beautiful surroundings.

December Weather in Horana South: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Horana South, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Horana South, December typically has an average temperature of 27°C (80°F), with highs reaching up to 33°C (92°F) and lows dropping to around 20°C (69°F).

Data source: Temperature data for Horana South generated using information from the Copernicus Climate Change Service.

December Precipitation in Horana South

In Horana South in December, the total precipitation amount is 207 mm (8.2 in) spread over 19 days.

December Precipitation Trends in Horana South

The chart displays monthly precipitation patterns in Horana South, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Horana South, December typically receives around 207 mm (8.2 inches) of precipitation spread over approximately 19 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Horana South

In Horana South in December humidity is 80%. With an average temperature of 27°C (80°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities feel more exhausting and sticky, and challenging you to stay hydrated while exploring.

December Average Humidity in Horana South

This chart illustrates the average monthly humidity levels in Horana South, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Horana South is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Horana South

In Horana South in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Horana South.

Maximum UV Index Levels in Horana South for December

The chart shows the monthly maximum UV Index (UVI) for Horana South in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Horana South typically reaches 10, which falls under the very high exposure category.

Data source: Horana South December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Horana South Compares to Other Months

Weather in Horana South varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Horana South, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Horana South, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	87 mm (3.4 inches)	77%	extreme
February Weather	28°C (82°F)	87 mm (3.4 inches)	73%	extreme
March Weather	28°C (83°F)	159 mm (6.3 inches)	74%	extreme
April Weather	28°C (83°F)	154 mm (6.1 inches)	74%	extreme
May Weather	28°C (82°F)	306 mm (12.1 inches)	76%	extreme
June Weather	28°C (82°F)	287 mm (11.3 inches)	82%	extreme
July Weather	27°C (81°F)	212 mm (8.4 inches)	82%	extreme
August Weather	27°C (81°F)	249 mm (9.8 inches)	83%	extreme
September Weather	27°C (81°F)	251 mm (9.9 inches)	82%	extreme
October Weather	27°C (80°F)	352 mm (13.9 inches)	81%	extreme
November Weather	27°C (80°F)	323 mm (12.7 inches)	80%	extreme
December Weather	27°C (80°F)	207 mm (8.2 inches)	80%	very high