Last updated: August 28, 2025
In October, the average temperature in Bayan-Ulaan, Mongolia hovers around -1°C (31°F), with fluctuations that can see lows of -14°C (8°F) and highs reaching up to 20°C (69°F). Visitors should expect some moisture, with 12 mm (0.5 in) of precipitation over approximately 2 days. Additionally, the air maintains an average humidity of 68%, contributing to the overall climate experience.
In October in Bayan-Ulaan, the average temperature is -1°C (31°F). Maximum temperatures can reach 20°C (69°F), while minimums can drop as low as -14°C (8°F). Be prepared for a wide range of temperatures if you plan to travel during this time.
In Bayan-Ulaan in October, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.
In Bayan-Ulaan in October, humidity is 68%. With an average temperature of -1°C (31°F), this humidity feels like a chilly, damp embrace that can make outdoor activities rather uncomfortable. The cold air, combined with the high moisture content, may leave travelers feeling more frigid than refreshed, making it essential to dress warmly and be prepared for the biting chill.
In Bayan-Ulaan in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Bayan-Ulaan.
UV Risk Categories
Weather in Bayan-Ulaan varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Bayan-Ulaan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -18°C (0°F) | 3 mm (0.1 inches) | 89% | low |
| February Weather | -15°C (6°F) | 8 mm (0.3 inches) | 81% | moderate |
| March Weather | -6°C (22°F) | 13 mm (0.5 inches) | 72% | high |
| April Weather | 2°C (35°F) | 19 mm (0.8 inches) | 69% | very high |
| May Weather | 8°C (47°F) | 25 mm (1.0 inches) | 54% | very high |
| June Weather | 14°C (57°F) | 40 mm (1.6 inches) | 60% | very high |
| July Weather | 16°C (61°F) | 86 mm (3.4 inches) | 64% | very high |
| August Weather | 13°C (56°F) | 91 mm (3.6 inches) | 65% | very high |
| September Weather | 8°C (47°F) | 32 mm (1.2 inches) | 68% | high |
| October Weather | -1°C (31°F) | 12 mm (0.5 inches) | 68% | moderate |
| November Weather | -9°C (17°F) | 6 mm (0.3 inches) | 75% | moderate |
| December Weather | -16°C (4°F) | 4 mm (0.2 inches) | 89% | low |