September Weather in Karaj, Iran

Last updated: August 23, 2025

In Karaj, Iran, the average temperature in September hovers around 24°C (75°F), making it a pleasant time to visit. Expect a minimum of 11°C (53°F) and the possibility of a warm maximum of 36°C (96°F). With a mere 1 mm (0.0 in) of precipitation over 0 days, you can anticipate mostly dry weather, complemented by an average humidity level of 45%.

September Temperature in Karaj

In September in Karaj, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (96°F) and minimums dipping as low as 11°C (53°F). This comfortable temperature range makes it an ideal time for travelers to explore and enjoy the outdoors in Karaj.

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

The chart illustrates September temperature patterns in Karaj, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Karaj, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (96°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Karaj

In Karaj in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Karaj

The chart displays monthly precipitation patterns in Karaj, 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 Karaj, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 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 Karaj

In Karaj in September humidity is 45%. With an average temperature of 24°C (75°F), this humidity feels like a refreshing embrace, making it quite pleasant for traveling.

September Average Humidity in Karaj

This chart illustrates the average monthly humidity levels in Karaj, 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 Karaj is approximately 45%, 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 Karaj

In Karaj 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 Karaj.

Maximum UV Index Levels in Karaj for September

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

Data source: Karaj 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 Karaj Compares to Other Months

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

This table compares monthly weather conditions in Karaj, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	34 mm (1.3 inches)	70%	moderate
February Weather	3°C (38°F)	56 mm (2.2 inches)	66%	moderate
March Weather	8°C (47°F)	49 mm (1.9 inches)	68%	very high
April Weather	14°C (57°F)	54 mm (2.1 inches)	62%	very high
May Weather	20°C (68°F)	24 mm (1.0 inches)	64%	extreme
June Weather	27°C (80°F)	4 mm (0.1 inches)	62%	extreme
July Weather	29°C (85°F)	2 mm (0.1 inches)	52%	extreme
August Weather	28°C (82°F)	0 mm (0.0 inches)	40%	very high
September Weather	24°C (75°F)	1 mm (0.0 inches)	45%	very high
October Weather	16°C (61°F)	20 mm (0.8 inches)	61%	high
November Weather	8°C (47°F)	39 mm (1.5 inches)	72%	moderate
December Weather	4°C (39°F)	33 mm (1.3 inches)	70%	moderate