September weather forecast
Ulaanbaatar, Mongolia

The valley city of Ulaanbaatar in Mongolia, with the distant view of the mountain ranges
The valley city of Ulaanbaatar in Mongolia, with the distant view of the mountain ranges

Weather in September

September, the first month of the autumn, in Ulaanbaatar, is still a comfortable month, with average temperature varying between 3.6°C (38.5°F) and 16.7°C (62.1°F).

Temperature

In September, the average high-temperature decreases, from an agreeable 22.3°C (72.1°F) in August, to a comfortable 16.7°C (62.1°F). In September, in Ulaanbaatar, Mongolia, the average low-temperature is 3.6°C (38.5°F).

Humidity

In Ulaanbaatar, the average relative humidity in September is 59%.

Rainfall

In Ulaanbaatar, during 8 rainfall days, 27mm (1.06") of precipitation is typically accumulated. In Ulaanbaatar, during the entire year, the rain falls for 62.7 days and collects up to 267mm (10.51") of precipitation.

Snowfall

Months with snowfall in Ulaanbaatar are January through December. In September, snow falls for 2 days. Throughout the year, in Ulaanbaatar, there are 58.9 snowfall days.

Daylight

In September, the average length of the day in Ulaanbaatar is 12.6h.

Sunshine

In September, the average sunshine in Ulaanbaatar is 8.2h.

UV index

In Ulaanbaatar, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Ulaanbaatar?

In September, the average relative humidity is 59%.

How many days does it rain in September in Ulaanbaatar?

In September, in Ulaanbaatar, Mongolia, the rain falls for 8 days. Throughout September, 27mm (1.06") of precipitation is accumulated.

How many days does it snow in September in Ulaanbaatar?

In Ulaanbaatar, Mongolia, during September, snow falls for 2 days.

What is the average length of the day in September in Ulaanbaatar?

In Ulaanbaatar, Mongolia, the average length of the day in September is 12.6h.

How many hours of sunshine does Ulaanbaatar have in September?

In Ulaanbaatar, the average sunshine in September is 8.2h.

How high is the UV index in September in Ulaanbaatar?

In Ulaanbaatar, Mongolia, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Ulaanbaatar, Mongolia

Average temperature in September - Ulaanbaatar, Mongolia
  • Average high temperature in September: 16.7°C

The warmest month (with the highest average high temperature) is July (24.5°C).
The month with the lowest average high temperature is January (-15.6°C).

  • Average low temperature in September: 3.6°C

The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-25.9°C).

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Average humidity in September
Ulaanbaatar, Mongolia

Average humidity in September - Ulaanbaatar, Mongolia
  • Average humidity in September: 59%

Months with the highest relative humidity are January and December (78%).
The month with the lowest relative humidity is May (46%).

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Average rainfall in September
Ulaanbaatar, Mongolia

Average rainfall in September - Ulaanbaatar, Mongolia
  • Average rainfall in September: 27mm

The wettest month (with the highest rainfall) is August (70mm).
The driest month (with the least rainfall) is January (2mm).

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Average rainfall days in September
Ulaanbaatar, Mongolia

Average rainfall days in September - Ulaanbaatar, Mongolia
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (0 days).

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Average snowfall days in September
Ulaanbaatar, Mongolia

Average snowfall days in September - Ulaanbaatar, Mongolia
  • Average snowfall days in September: 2 days

The month with the highest number of snowfall days is December (10 days).
The month with the least snowfall days is July (0.2 days).

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Average daylight in September /
Average sunshine in September
Ulaanbaatar, Mongolia

Average daylight in September / Average sunshine in September - Ulaanbaatar, Mongolia
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in September: 8.2h

The month with the most sunshine is May (Average sunshine: 9.7h).
The month with the least sunshine is December (Average sunshine: 5h).

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Average UV index in September
Ulaanbaatar, Mongolia

Average UV index in September - Ulaanbaatar, Mongolia
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

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