September weather forecastUlaanbaatar, Mongolia

Weather in September

September ushers in autumn in Ulaanbaatar, manifesting a perceptible cooling trend. While the daily sunshine duration barely changes, the shorter daylight hours herald the incoming fall season. Settling between 3.6°C (38.5°F) and 16.7°C (62.1°F), temperatures begin to feel the chill of autumn. The rainfall drops drastically to 27mm (1.06"), marking the beginning of the dry season. As autumn unravels, participants in outdoor activities should carry a light jacket or a sweater.

Temperature

Stepping into September, Ulaanbaatar observes a temperature decline, with the average high falling from August's agreeable 22.3°C (72.1°F) to a comfortable 16.7°C (62.1°F). Ulaanbaatar logs a considerable temperature decrease from the daytime highs during the nights in September, with an average reading of 3.6°C (38.5°F).

Humidity

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

Rainfall

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

Snowfall

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

Daylight

In Ulaanbaatar, the average length of the day in September is 12h and 35min.
On the first day of September, sunrise is at 06:10 and sunset at 19:33. On the last day of the month, sunrise is at 06:50 and sunset at 18:34 +08.

Sunshine

The average sunshine in September is 8.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.