January Weather in Chilaw, Sri Lanka

Last updated: August 31, 2025

In January, the average temperature in Chilaw, Sri Lanka reaches a pleasant 27°C (80°F). Expect a minimum of 22°C (71°F) and a maximum of 32°C (90°F), making it ideal for outdoor activities. However, be prepared for a bit of rain, with 45 mm (1.8 in) of precipitation spread over 5 days. The air is comfortably humid, with an average humidity of 77%, ensuring a refreshing atmosphere throughout the month.

January Temperature in Chilaw

In January in Chilaw, the average temperature is 27°C (80°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 22°C (71°F). This pleasant climate makes Chilaw an ideal destination for travelers seeking warmth and sunshine.

January Weather in Chilaw: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Chilaw, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chilaw, January typically has an average temperature of 27°C (80°F), with highs reaching up to 32°C (90°F) and lows dropping to around 22°C (71°F).

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

January Precipitation in Chilaw

In Chilaw in January, the total precipitation amount is 45 mm (1.8 in) over a span of 5 days.

January Precipitation Trends in Chilaw

The chart displays monthly precipitation patterns in Chilaw, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Chilaw, January typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Chilaw

In Chilaw in January humidity is 77%. With an average temperature of 27°C (80°F), this humidity feels like walking through a warm, damp blanket that clings to your skin, making outdoor activities feel more strenuous and requiring frequent breaks and hydration for comfort.

January Average Humidity in Chilaw

This chart illustrates the average monthly humidity levels in Chilaw, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Chilaw is approximately 77%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Chilaw

In Chilaw in January, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Chilaw.

Maximum UV Index Levels in Chilaw for January

The chart shows the monthly maximum UV Index (UVI) for Chilaw in January, 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 January, the maximum UV index in Chilaw typically reaches 12, which falls under the extreme exposure category.

Data source: Chilaw January 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 January Weather in Chilaw Compares to Other Months

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

This table compares monthly weather conditions in Chilaw, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (80°F)	45 mm (1.8 inches)	77%	extreme
February Weather	27°C (82°F)	18 mm (0.7 inches)	73%	extreme
March Weather	28°C (83°F)	83 mm (3.3 inches)	74%	extreme
April Weather	28°C (83°F)	122 mm (4.8 inches)	74%	extreme
May Weather	28°C (83°F)	266 mm (10.5 inches)	76%	extreme
June Weather	28°C (83°F)	204 mm (8.0 inches)	82%	extreme
July Weather	28°C (82°F)	123 mm (4.8 inches)	82%	extreme
August Weather	27°C (81°F)	155 mm (6.1 inches)	83%	extreme
September Weather	27°C (81°F)	199 mm (7.8 inches)	82%	extreme
October Weather	27°C (81°F)	311 mm (12.2 inches)	81%	extreme
November Weather	27°C (81°F)	308 mm (12.1 inches)	80%	extreme
December Weather	27°C (81°F)	139 mm (5.5 inches)	80%	very high