September Weather in Ongi, Mongolia

Last updated: August 28, 2025

In Ongi, Mongolia, the average temperature in September hovers around 15°C (59°F). You'll experience a temperature range that dips as low as -5°C (24°F) and soars up to a balmy 31°C (88°F). Expect a touch of moisture, with precipitation totaling 13 mm (0.5 in) over the course of about 3 days. Additionally, enjoy a comfortable average humidity level of 45%.

September Temperature in Ongi

In September in Ongi, the average temperature is 15°C (59°F). The maximum can reach 31°C (88°F), and the minimum can be as low as -5°C (24°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Ongi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ongi, September typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (88°F) and lows dropping to around -5°C (24°F).

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

September Precipitation in Ongi

In Ongi in September, the precipitation amount is 13 mm (0.5 in) over a span of 3 days.

September Precipitation Trends in Ongi

The chart displays monthly precipitation patterns in Ongi, 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 Ongi, September typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 3 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 Ongi

In Ongi in September, humidity is 45%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing yet mild environment for traveling, allowing for comfortable exploration without the discomfort of heavy heat.

September Average Humidity in Ongi

This chart illustrates the average monthly humidity levels in Ongi, 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 Ongi 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 Ongi

In Ongi in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Ongi.

Maximum UV Index Levels in Ongi for September

The chart shows the monthly maximum UV Index (UVI) for Ongi 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 Ongi typically reaches 7, which falls under the high exposure category.

Data source: Ongi 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 Ongi Compares to Other Months

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

This table compares monthly weather conditions in Ongi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-16°C (3°F)	2 mm (0.1 inches)	77%	low
February Weather	-12°C (11°F)	3 mm (0.1 inches)	65%	moderate
March Weather	-1°C (30°F)	8 mm (0.3 inches)	46%	moderate
April Weather	8°C (46°F)	7 mm (0.3 inches)	46%	very high
May Weather	14°C (58°F)	7 mm (0.3 inches)	36%	very high
June Weather	21°C (70°F)	8 mm (0.3 inches)	40%	very high
July Weather	23°C (73°F)	39 mm (1.6 inches)	41%	very high
August Weather	20°C (68°F)	32 mm (1.2 inches)	43%	very high
September Weather	15°C (59°F)	13 mm (0.5 inches)	45%	high
October Weather	4°C (39°F)	4 mm (0.1 inches)	49%	moderate
November Weather	-6°C (21°F)	2 mm (0.1 inches)	55%	moderate
December Weather	-15°C (5°F)	2 mm (0.1 inches)	78%	low