September Weather in Simla, United States

Last updated: June 24, 2025

In September, the average temperature in Simla, United States hovers around 19°C (67°F). However, be prepared for a range of temperatures, with a minimum plummeting to -2°C (29°F) and a maximum soaring to 35°C (96°F). Expect 26 mm (1.0 in) of precipitation over 6 days, contributing to an average humidity of 79%.

September Temperature in Simla

In September in Simla, the average temperature is 19°C (67°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as -2°C (29°F). Whether you're looking to enjoy warm days or need to prepare for chilly nights, pack accordingly for a varied climate.

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

The chart illustrates September temperature patterns in Simla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Simla, September typically has an average temperature of 19°C (67°F), with highs reaching up to 35°C (96°F) and lows dropping to around -2°C (29°F).

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

September Precipitation in Simla

In Simla in September, the precipitation amount is 26 mm (1.0 in) over the course of 6 days.

September Precipitation Trends in Simla

The chart displays monthly precipitation patterns in Simla, 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 Simla, September typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 6 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 Simla

In Simla in September, humidity is 79%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit more challenging, as the air is thick and can leave you feeling sluggish during outdoor adventures.

September Average Humidity in Simla

This chart illustrates the average monthly humidity levels in Simla, 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 Simla is approximately 79%, 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 Simla

In Simla 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 Simla.

Maximum UV Index Levels in Simla for September

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

Data source: Simla 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 Simla Compares to Other Months

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

This table compares monthly weather conditions in Simla, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	15 mm (0.6 inches)	74%	moderate
February Weather	-1°C (31°F)	17 mm (0.7 inches)	75%	moderate
March Weather	5°C (41°F)	58 mm (2.3 inches)	66%	very high
April Weather	9°C (48°F)	42 mm (1.6 inches)	62%	very high
May Weather	14°C (57°F)	82 mm (3.2 inches)	74%	extreme
June Weather	21°C (70°F)	49 mm (1.9 inches)	76%	extreme
July Weather	23°C (73°F)	59 mm (2.3 inches)	75%	extreme
August Weather	22°C (72°F)	47 mm (1.8 inches)	80%	extreme
September Weather	19°C (67°F)	26 mm (1.0 inches)	79%	very high
October Weather	10°C (50°F)	30 mm (1.2 inches)	77%	high
November Weather	5°C (42°F)	15 mm (0.6 inches)	74%	moderate
December Weather	2°C (35°F)	8 mm (0.3 inches)	80%	moderate