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September Weather in Erhet, Mongolia

Last updated: August 28, 2025

In Erhet, Mongolia, the average temperature for September hovers around 10°C (51°F). Expect a range where the minimum can dip to -5°C (23°F) while the maximum may reach up to 30°C (87°F). This month brings about 45 mm (1.8 in) of precipitation over 7 days, with an average humidity of 79%. Stay prepared for a mix of conditions!

September Temperature in Erhet

In September in Erhet, the average temperature is 10°C (51°F). The maximum can reach 30°C (87°F), and the minimum can be as low as -5°C (23°F). This variation in temperature makes it essential for travelers to pack layers to accommodate both warm and cool conditions.

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

The chart illustrates September temperature patterns in Erhet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Erhet, September typically has an average temperature of 10°C (51°F), with highs reaching up to 30°C (87°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec062439516264605133184
Data source: Temperature data for Erhet generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Erhet

In Erhet in September, the precipitation amount is 45 mm (1.8 in) spread over a duration of 7 days.

September Precipitation Trends in Erhet

The chart displays monthly precipitation patterns in Erhet, 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 Erhet, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec27920297092103451994
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Erhet

In Erhet in September, humidity is 79%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel somewhat uncomfortable unless you're properly layered.

September Average Humidity in Erhet

This chart illustrates the average monthly humidity levels in Erhet, 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 Erhet is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%78%66%70%65%73%78%79%80%78%78%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Erhet

In Erhet in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Erhet, you can refer to this Hourly UV Index in Erhet.

Maximum UV Index Levels in Erhet for September

The chart shows the monthly maximum UV Index (UVI) for Erhet 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 Erhet typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235899996421
Data source: Erhet 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 Erhet Compares to Other Months

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

This table compares monthly weather conditions in Erhet, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-18°C (0°F)2 mm (0.1 inches)90%low
February Weather-14°C (6°F)7 mm (0.3 inches)77%moderate
March Weather-4°C (24°F)9 mm (0.3 inches)66%moderate
April Weather4°C (39°F)20 mm (0.8 inches)70%very high
May Weather11°C (52°F)29 mm (1.1 inches)65%very high
June Weather16°C (62°F)70 mm (2.8 inches)73%very high
July Weather18°C (65°F)92 mm (3.6 inches)78%very high
August Weather15°C (60°F)103 mm (4.0 inches)79%very high
September Weather10°C (51°F)45 mm (1.8 inches)79%high
October Weather1°C (34°F)19 mm (0.8 inches)78%moderate
November Weather-8°C (18°F)9 mm (0.3 inches)78%low
December Weather-16°C (4°F)4 mm (0.1 inches)89%low

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