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September Weather in Mawalgama, Sri Lanka

Last updated: August 31, 2025

In September, the average temperature in Mawalgama, Sri Lanka is a pleasant 25°C (77°F), with minimums dipping to 20°C (69°F) and maximums reaching a warm 31°C (87°F). Expect 302 mm (11.9 in) of precipitation spread over 27 days, resulting in a notable average humidity of 81%. Stay prepared for a tropical atmosphere!

September Temperature in Mawalgama

In September in Mawalgama, the average temperature is 25°C (77°F). The maximum can reach 31°C (87°F) and the minimum can be as low as 20°C (69°F). This makes it an ideal time for travelers to explore and enjoy outdoor activities comfortably.

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

The chart illustrates September temperature patterns in Mawalgama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mawalgama, September typically has an average temperature of 25°C (77°F), with highs reaching up to 31°C (87°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec777980807978787777777777
Data source: Temperature data for Mawalgama generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Mawalgama

In Mawalgama in September, the total precipitation amount is 302 mm (11.9 in) over the course of 27 days.

September Precipitation Trends in Mawalgama

The chart displays monthly precipitation patterns in Mawalgama, 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 Mawalgama, September typically receives around 302 mm (11.9 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec138157267291393301276335302462528259
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mawalgama

In Mawalgama in September, humidity is 81%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, thick blanket, making traveling quite challenging as you may feel sticky and sluggish, requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Mawalgama

This chart illustrates the average monthly humidity levels in Mawalgama, 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 Mawalgama is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%72%69%69%79%85%81%85%81%89%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mawalgama

In Mawalgama 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 Mawalgama, you can check here.

Maximum UV Index Levels in Mawalgama for September

The chart shows the monthly maximum UV Index (UVI) for Mawalgama 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 Mawalgama typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131415151413131414131111
Data source: Mawalgama 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 Mawalgama Compares to Other Months

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

This table compares monthly weather conditions in Mawalgama, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)137 mm (5.4 inches)80%extreme
February Weather26°C (79°F)157 mm (6.2 inches)72%extreme
March Weather27°C (80°F)267 mm (10.5 inches)69%extreme
April Weather27°C (80°F)291 mm (11.4 inches)69%extreme
May Weather26°C (79°F)393 mm (15.5 inches)79%extreme
June Weather26°C (79°F)301 mm (11.9 inches)85%extreme
July Weather25°C (78°F)276 mm (10.8 inches)81%extreme
August Weather25°C (78°F)335 mm (13.2 inches)85%extreme
September Weather25°C (77°F)302 mm (11.9 inches)81%extreme
October Weather25°C (77°F)462 mm (18.2 inches)89%extreme
November Weather25°C (77°F)528 mm (20.8 inches)88%extreme
December Weather25°C (77°F)259 mm (10.2 inches)86%extreme

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