September Weather in Katunayaka, Sri Lanka

Last updated: August 31, 2025

In September, the average temperature in Katunayaka, Sri Lanka hovers around 27°C (81°F). Expect a minimum of 23°C (73°F) and a peak of 31°C (89°F). During the month, 233 mm (9.2 in) of precipitation falls over 27 days, accompanied by an average humidity of 82%. Embrace the warmth, but be prepared for those rainy days!

September Temperature in Katunayaka

In September, in Katunayaka, the average temperature is 27°C (81°F). The maximum can reach 31°C (89°F), while the minimum can drop to as low as 23°C (73°F). This warm climate makes Katunayaka a perfect destination for travelers seeking pleasant weather.

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

The chart illustrates September 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, September typically has an average temperature of 27°C (81°F), with highs reaching up to 31°C (89°F) and lows dropping to around 23°C (73°F).

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

September Precipitation in Katunayaka

In Katunayaka in September, the precipitation amount is 233 mm (9.2 in) spread over 27 days.

September Precipitation Trends in Katunayaka

The chart displays monthly precipitation patterns in Katunayaka, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Katunayaka, September typically receives around 233 mm (9.2 inches) of precipitation spread over approximately 27 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Katunayaka

In Katunayaka in September humidity is 82%. With an average temperature of 27°C (81°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel more exhausting, and leaving you longing for the relief of air-conditioned spaces during your travels.

September Average Humidity in Katunayaka

This chart illustrates the average monthly humidity levels in Katunayaka, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Katunayaka is approximately 82%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Katunayaka

In Katunayaka in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Katunayaka, you can check here.

Maximum UV Index Levels in Katunayaka for September

The chart shows the monthly maximum UV Index (UVI) for Katunayaka in September, 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 September, the maximum UV index in Katunayaka typically reaches 14, which falls under the extreme exposure category.

Data source: Katunayaka September 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 September 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 September’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 September’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