Last updated: August 28, 2025
In September, the average temperature in Bayan-Ovoo, Mongolia hovers around 10°C (51°F). Expect a minimum of -5°C (23°F) and a pleasant maximum of 29°C (84°F). With an average precipitation of 51 mm (2.0 in) spread over 8 days, it’s wise to be prepared for some rain. Moreover, the average humidity sits at a comfortable 82%, adding to the region's unique climate.
In September in Bayan-Ovoo, the average temperature is 10°C (51°F). Maximums can reach 29°C (84°F), and minimums can be as low as -5°C (23°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!
In Bayan-Ovoo in September, the total precipitation amount is 51 mm (2.0 in), spread over a duration of 8 days.
In Bayan-Ovoo in September humidity is 82%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures less appealing and prompting travelers to seek cozy indoor activities or warm drinks to counter the brisk air.
In Bayan-Ovoo 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 Bayan-Ovoo, you can refer to this Hourly UV Index in Bayan-Ovoo.
UV Risk Categories
Weather in Bayan-Ovoo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bayan-Ovoo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -21°C (-6°F) | 2 mm (0.1 inches) | 92% | low |
| February Weather | -18°C (0°F) | 6 mm (0.2 inches) | 86% | moderate |
| March Weather | -6°C (22°F) | 6 mm (0.3 inches) | 72% | moderate |
| April Weather | 4°C (39°F) | 15 mm (0.6 inches) | 67% | high |
| May Weather | 11°C (51°F) | 32 mm (1.3 inches) | 69% | very high |
| June Weather | 17°C (63°F) | 61 mm (2.4 inches) | 67% | very high |
| July Weather | 19°C (67°F) | 113 mm (4.5 inches) | 79% | very high |
| August Weather | 16°C (61°F) | 95 mm (3.8 inches) | 79% | very high |
| September Weather | 10°C (51°F) | 51 mm (2.0 inches) | 82% | high |
| October Weather | 1°C (33°F) | 20 mm (0.8 inches) | 79% | moderate |
| November Weather | -10°C (15°F) | 6 mm (0.2 inches) | 81% | low |
| December Weather | -18°C (0°F) | 3 mm (0.1 inches) | 90% | low |