September Weather in Vallam, India

Last updated: August 23, 2025

In Vallam, India, the average temperature in September is a warm 30°C (86°F). Expect minimums of 24°C (76°F) and maximums soaring to 38°C (101°F). With an average humidity of 76%, the climate can feel quite muggy. Prepare for some rain too, as there is an average precipitation of 133 mm (5.2 in) over about 19 days.

September Temperature in Vallam

In September in Vallam, the average temperature is 30°C (86°F). Maximums can reach 38°C (101°F) and minimums can drop to as low as 24°C (76°F). This warm weather makes Vallam an ideal destination for those looking to enjoy sunny days and vibrant outdoor activities.

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

The chart illustrates September temperature patterns in Vallam, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vallam, September typically has an average temperature of 30°C (86°F), with highs reaching up to 38°C (101°F) and lows dropping to around 24°C (76°F).

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

September Precipitation in Vallam

In Vallam in September, the precipitation amount is 133 mm (5.2 in) over the course of 19 days.

September Precipitation Trends in Vallam

The chart displays monthly precipitation patterns in Vallam, 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 Vallam, September typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 19 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 Vallam

In Vallam in September, humidity is 76%. With an average temperature of 30°C (86°F), this humidity feels like wrapping yourself in a warm, damp blanket, making it quite uncomfortable for traveling. The thick, heavy air can leave you feeling sticky, fatigued, and in need of frequent breaks to stay hydrated and cool.

September Average Humidity in Vallam

This chart illustrates the average monthly humidity levels in Vallam, 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 Vallam is approximately 76%, 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 Vallam

In Vallam in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Vallam.

Maximum UV Index Levels in Vallam for September

The chart shows the monthly maximum UV Index (UVI) for Vallam 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 Vallam typically reaches 13, which falls under the extreme exposure category.

Data source: Vallam 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 Vallam Compares to Other Months

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

This table compares monthly weather conditions in Vallam, 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 (79°F)	46 mm (1.8 inches)	72%	very high
February Weather	27°C (80°F)	5 mm (0.2 inches)	62%	extreme
March Weather	29°C (85°F)	16 mm (0.6 inches)	57%	extreme
April Weather	31°C (88°F)	18 mm (0.7 inches)	56%	extreme
May Weather	32°C (90°F)	44 mm (1.7 inches)	64%	extreme
June Weather	32°C (90°F)	61 mm (2.4 inches)	71%	extreme
July Weather	31°C (89°F)	71 mm (2.8 inches)	64%	extreme
August Weather	31°C (87°F)	93 mm (3.7 inches)	69%	extreme
September Weather	30°C (86°F)	133 mm (5.2 inches)	76%	extreme
October Weather	29°C (84°F)	156 mm (6.1 inches)	87%	extreme
November Weather	27°C (81°F)	232 mm (9.1 inches)	88%	extreme
December Weather	26°C (79°F)	119 mm (4.7 inches)	83%	very high