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September Weather in Vavuniya, Sri Lanka

Last updated: August 31, 2025

In September, the average temperature in Vavuniya, Sri Lanka typically hovers around 28°C (83°F). You can expect a minimum of 23°C (75°F) and a sweltering maximum of 37°C (98°F). With an average humidity of 82% and precipitation totaling 96 mm (3.8 in) over approximately 13 days, it's a month that calls for both sunshine and rain!

September Temperature in Vavuniya

In September in Vavuniya, the average temperature is 28°C (83°F). Maximums can reach 37°C (98°F), while minimums can drop to as low as 23°C (75°F). This climate makes Vavuniya an ideal destination for travelers seeking warm and enjoyable weather.

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

The chart illustrates September temperature patterns in Vavuniya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vavuniya, September typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (98°F) and lows dropping to around 23°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec777882848485858483817978
Data source: Temperature data for Vavuniya 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 Vavuniya

In Vavuniya in September, the precipitation amount is 96 mm (3.8 in) spread over 13 days, indicating a relatively rainy period.

September Precipitation Trends in Vavuniya

The chart displays monthly precipitation patterns in Vavuniya, 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 Vavuniya, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8723586811634616096235259172
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Vavuniya

In Vavuniya in September, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

September Average Humidity in Vavuniya

This chart illustrates the average monthly humidity levels in Vavuniya, 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 Vavuniya is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%75%76%72%75%83%80%85%82%83%84%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Vavuniya

In Vavuniya 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 Vavuniya, you can check here.

Maximum UV Index Levels in Vavuniya for September

The chart shows the monthly maximum UV Index (UVI) for Vavuniya 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 Vavuniya typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151312121314121110
Data source: Vavuniya 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 Vavuniya Compares to Other Months

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

This table compares monthly weather conditions in Vavuniya, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)87 mm (3.4 inches)79%extreme
February Weather26°C (79°F)23 mm (0.9 inches)75%extreme
March Weather28°C (82°F)58 mm (2.3 inches)76%extreme
April Weather29°C (85°F)68 mm (2.7 inches)72%extreme
May Weather29°C (84°F)116 mm (4.6 inches)75%extreme
June Weather29°C (85°F)33 mm (1.3 inches)82%extreme
July Weather29°C (85°F)61 mm (2.4 inches)80%extreme
August Weather29°C (84°F)60 mm (2.4 inches)85%extreme
September Weather28°C (83°F)96 mm (3.8 inches)82%extreme
October Weather27°C (82°F)235 mm (9.3 inches)83%extreme
November Weather26°C (79°F)259 mm (10.2 inches)84%extreme
December Weather26°C (78°F)172 mm (6.8 inches)83%very high

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