September Weather in Kosi, India

Last updated: August 23, 2025

In September, the average temperature in Kosi, India reaches a warm 29°C (85°F). Expect temperatures to fluctuate between a minimum of 22°C (72°F) and a scorching maximum of 39°C (102°F). With an average humidity of 87%, you'll feel the warmth, especially during the 15 days of the month that experience a total precipitation of 115 mm (4.5 in). Plan accordingly to enjoy your time!

September Temperature in Kosi

In September in Kosi, the average temperature is 29°C (85°F), with maximums reaching 39°C (102°F) and minimums dropping to as low as 22°C (72°F). It's an ideal time to visit for those who enjoy warm weather, but be sure to stay hydrated and protect yourself from the heat while exploring.

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

The chart illustrates September temperature patterns in Kosi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kosi, September typically has an average temperature of 29°C (85°F), with highs reaching up to 39°C (102°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Kosi

In Kosi in September, the total precipitation amount is 115 mm (4.5 in) over a span of 15 days.

September Precipitation Trends in Kosi

The chart displays monthly precipitation patterns in Kosi, 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 Kosi, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Kosi

In Kosi in September humidity is 87%. With an average temperature of 29°C (85°F), this humidity feels like a warm, enveloping blanket, making travel uncomfortable and sticky; you find yourself longing for a cool breeze as you navigate the bustling streets or relax at outdoor cafes.

September Average Humidity in Kosi

This chart illustrates the average monthly humidity levels in Kosi, 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 Kosi is approximately 87%, 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 Kosi

In Kosi in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Kosi.

Maximum UV Index Levels in Kosi for September

The chart shows the monthly maximum UV Index (UVI) for Kosi 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 Kosi typically reaches 10, which falls under the very high exposure category.

Data source: Kosi 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 Kosi Compares to Other Months

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

This table compares monthly weather conditions in Kosi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	21 mm (0.8 inches)	48%	moderate
February Weather	17°C (63°F)	11 mm (0.4 inches)	38%	high
March Weather	23°C (74°F)	27 mm (1.1 inches)	27%	very high
April Weather	30°C (86°F)	12 mm (0.5 inches)	19%	very high
May Weather	32°C (91°F)	27 mm (1.0 inches)	22%	extreme
June Weather	34°C (93°F)	39 mm (1.5 inches)	28%	very high
July Weather	31°C (89°F)	211 mm (8.3 inches)	72%	extreme
August Weather	30°C (86°F)	202 mm (7.9 inches)	89%	extreme
September Weather	29°C (85°F)	115 mm (4.5 inches)	87%	very high
October Weather	26°C (80°F)	14 mm (0.5 inches)	85%	very high
November Weather	20°C (69°F)	12 mm (0.5 inches)	80%	moderate
December Weather	15°C (59°F)	9 mm (0.4 inches)	74%	moderate