September Weather in Puttalam, Sri Lanka

Last updated: August 31, 2025

In September, the average temperature in Puttalam, Sri Lanka hovers around 27°C (82°F), providing a warm and inviting climate. Temperatures can dip to a comfortable 25°C (77°F) and peak at a toasty 31°C (88°F). However, be prepared for some rain, as 136 mm (5.3 in) of precipitation is expected over 22 days, resulting in an average humidity of 82%. Whether you're basking in the sun or enjoying a refreshing drizzle, Puttalam has a vibrant atmosphere waiting for you!

September Temperature in Puttalam

In September in Puttalam, the average temperature is 27°C (82°F). Maximums can reach 31°C (88°F), and minimums can drop to 25°C (77°F). This pleasant weather makes Puttalam an ideal destination for travelers seeking warmth and sunshine.

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

The chart illustrates September temperature patterns in Puttalam, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Puttalam, September typically has an average temperature of 27°C (82°F), with highs reaching up to 31°C (88°F) and lows dropping to around 25°C (77°F).

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

September Precipitation in Puttalam

In Puttalam, in September, the precipitation amount is 136 mm (5.3 in) spread over 22 days.

September Precipitation Trends in Puttalam

The chart displays monthly precipitation patterns in Puttalam, 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 Puttalam, September typically receives around 136 mm (5.3 inches) of precipitation spread over approximately 22 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 Puttalam

In Puttalam in September humidity is 82%. With an average temperature of 27°C (82°F), this humidity feels like stepping into a warm, thick blanket, making outdoor activities quite uncomfortable and travel feel a bit sluggish.

September Average Humidity in Puttalam

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

In Puttalam 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 Puttalam, you can check here.

Maximum UV Index Levels in Puttalam for September

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

Data source: Puttalam 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 Puttalam Compares to Other Months

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

This table compares monthly weather conditions in Puttalam, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	46 mm (1.8 inches)	77%	extreme
February Weather	27°C (81°F)	16 mm (0.6 inches)	73%	extreme
March Weather	28°C (83°F)	52 mm (2.0 inches)	74%	extreme
April Weather	29°C (84°F)	99 mm (3.9 inches)	74%	extreme
May Weather	29°C (84°F)	182 mm (7.2 inches)	76%	extreme
June Weather	28°C (83°F)	102 mm (4.0 inches)	82%	extreme
July Weather	28°C (83°F)	51 mm (2.0 inches)	82%	extreme
August Weather	28°C (82°F)	78 mm (3.1 inches)	83%	extreme
September Weather	27°C (82°F)	136 mm (5.3 inches)	82%	extreme
October Weather	27°C (81°F)	269 mm (10.6 inches)	81%	extreme
November Weather	27°C (81°F)	292 mm (11.5 inches)	80%	extreme
December Weather	27°C (80°F)	134 mm (5.3 inches)	80%	very high