December Weather in Katunayaka, Sri Lanka

Last updated: August 31, 2025

In Katunayaka, Sri Lanka, the average temperature in December is a warm 27°C (80°F). You can expect minimum temperatures as low as 21°C (70°F) and maximums reaching up to 33°C (92°F). Be prepared for some rain, as the area receives an average precipitation of 134 mm (5.3 in) over about 14 days. With an average humidity of 80%, the tropical climate can feel quite warm and muggy.

December Temperature in Katunayaka

In December in Katunayaka, the average temperature is 27°C (80°F), with maximums reaching up to 33°C (92°F) and minimums dipping as low as 21°C (70°F). This makes it an ideal time for travelers seeking warm weather and a comfortable climate for exploring.

December Weather in Katunayaka: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Katunayaka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katunayaka, 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 21°C (70°F).

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

December Precipitation in Katunayaka

In Katunayaka in December, the total precipitation amount is 134 mm (5.3 in) over the course of 14 days.

December Precipitation Trends in Katunayaka

The chart displays monthly precipitation patterns in Katunayaka, 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 Katunayaka, December typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 14 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Katunayaka

In Katunayaka 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 Katunayaka

This chart illustrates the average monthly humidity levels in Katunayaka, 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 Katunayaka 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 Katunayaka

In Katunayaka 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 Katunayaka.

Maximum UV Index Levels in Katunayaka for December

The chart shows the monthly maximum UV Index (UVI) for Katunayaka 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 Katunayaka typically reaches 10, which falls under the very high exposure category.

Data source: Katunayaka 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 Katunayaka Compares to Other Months

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

This table compares monthly weather conditions in Katunayaka, 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)	57 mm (2.2 inches)	77%	extreme
February Weather	28°C (83°F)	30 mm (1.2 inches)	73%	extreme
March Weather	29°C (84°F)	93 mm (3.6 inches)	74%	extreme
April Weather	28°C (83°F)	145 mm (5.7 inches)	74%	extreme
May Weather	28°C (83°F)	266 mm (10.5 inches)	76%	extreme
June Weather	28°C (82°F)	248 mm (9.8 inches)	82%	extreme
July Weather	27°C (82°F)	193 mm (7.6 inches)	82%	extreme
August Weather	27°C (81°F)	236 mm (9.3 inches)	83%	extreme
September Weather	27°C (81°F)	233 mm (9.2 inches)	82%	extreme
October Weather	27°C (80°F)	358 mm (14.1 inches)	81%	extreme
November Weather	27°C (80°F)	370 mm (14.6 inches)	80%	extreme
December Weather	27°C (80°F)	134 mm (5.3 inches)	80%	very high