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September Weather in Kalmunai, Sri Lanka

Last updated: August 31, 2025

In Kalmunai, Sri Lanka, the average temperature in September reaches a warm 28°C (83°F). Expect lows of 25°C (76°F) and highs peaking at 33°C (92°F). This month typically sees 91 mm (3.6 in) of precipitation spread over 16 days, resulting in a notable average humidity level of 81%. Prepare for a tropical experience!

September Temperature in Kalmunai

In September in Kalmunai, the average temperature is 28°C (83°F). Maximums can reach 33°C (92°F) and minimums can be as low as 25°C (76°F). This pleasant climate makes Kalmunai an ideal destination for travelers looking to enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Kalmunai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kalmunai, September typically has an average temperature of 28°C (83°F), with highs reaching up to 33°C (92°F) and lows dropping to around 25°C (76°F).
JanFebMarAprMayJunJulAugSepOctNovDec787981838485848483818079
Data source: Temperature data for Kalmunai 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 Kalmunai

In Kalmunai in September, the total precipitation amount is 91 mm (3.6 in) spread over 16 days.

September Precipitation Trends in Kalmunai

The chart displays monthly precipitation patterns in Kalmunai, 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 Kalmunai, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec1399478566929445091184317253
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kalmunai

In Kalmunai in September, humidity is 81%. With an average temperature of 28°C (83°F), this humidity feels like walking through a warm, damp blanket, making travel feel both stifling and exhausting.

September Average Humidity in Kalmunai

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

In Kalmunai 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 Kalmunai, you can check here.

Maximum UV Index Levels in Kalmunai for September

The chart shows the monthly maximum UV Index (UVI) for Kalmunai 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 Kalmunai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121315151413121414131211
Data source: Kalmunai 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 Kalmunai Compares to Other Months

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

This table compares monthly weather conditions in Kalmunai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)139 mm (5.5 inches)80%extreme
February Weather26°C (79°F)93 mm (3.7 inches)72%extreme
March Weather27°C (81°F)78 mm (3.1 inches)69%extreme
April Weather28°C (83°F)56 mm (2.2 inches)69%extreme
May Weather29°C (84°F)69 mm (2.7 inches)79%extreme
June Weather29°C (85°F)29 mm (1.1 inches)85%extreme
July Weather29°C (85°F)44 mm (1.7 inches)81%extreme
August Weather29°C (84°F)50 mm (2.0 inches)85%extreme
September Weather28°C (83°F)91 mm (3.6 inches)81%extreme
October Weather27°C (82°F)184 mm (7.3 inches)89%extreme
November Weather26°C (80°F)317 mm (12.5 inches)88%extreme
December Weather26°C (79°F)253 mm (9.9 inches)86%extreme

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