Mongolia (Ulan Bator)
September
Weather in Mongolia for September 2025
Your guide to Mongolia weather in September - trends and predictions
In general, the average temperature in Mongolia at the beginning of September is 19.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.9 °C by the end of September.
With an average of 5 snowy days, Mongolia enjoys a light touch of snow in September.
Is September a good time to visit Mongolia? check out the best time to travel to Mongolia page.
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16
Dry days
9
Rainy days
5
Snow days
13°/5°
Temperatures
15 km/h
Avg max wind
71 %
Avg humidity
Mongolia in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  20° | 3  20° | 4 18° | 5  22° | 6  23° | 7 17° |
| 8 20° | 9 15° | 10 12° | 11 14° | 12  14° | 13  12° | 14  14° |
| 15 10° | 16 10° | 17 13° | 18 15° | 19 8° | 20 11° | 21 12° |
| 22 14° | 23 11° | 24 13° | 25 14° | 26 11° | 27  9° | 28  6° |
| 29 4° | 30 5° |
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Temperatures trend during September in Mongolia
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 19° /9° | 0 mm | 0 cm | |
| 2 Sept. | Patchy light rain with thunder | 20° /10° | 4 mm | 0 cm | |
| 3 Sept. | Patchy rain possible | 20° /7° | 0.6 mm | 0 cm | |
| 4 Sept. | Sunny | 18° /9° | 0 mm | 0 cm | |
| 5 Sept. | Thundery outbreaks possible | 22° /11° | 0.1 mm | 0 cm | |
| 6 Sept. | Light rain | 23° /9° | 1.2 mm | 0 cm | |
| 7 Sept. | Patchy rain possible | 17° /8° | 0.7 mm | 0 cm | |
| 8 Sept. | Thundery outbreaks possible | 20° /5° | 0.1 mm | 0 cm | |
| 9 Sept. | Light rain shower | 15° /4° | 2.1 mm | 0 cm | |
| 10 Sept. | Light rain shower | 12° /4° | 0.3 mm | 0 cm | |
| 11 Sept. | Sunny | 14° /5° | 0 mm | 0 cm | |
| 12 Sept. | Overcast | 14° /5° | 0 mm | 0 cm | |
| 13 Sept. | Partly cloudy | 12° /7° | 2.4 mm | 0 cm | |
| 14 Sept. | Mist | 14° /5° | 1.8 mm | 0 cm | |
| 15 Sept. | Mist | 10° /3° | 0.7 mm | 0 cm | |
| 16 Sept. | Overcast | 10° /4° | 0.1 mm | 0 cm | |
| 17 Sept. | Patchy rain possible | 13° /5° | 0.3 mm | 0 cm | |
| 18 Sept. | Thundery outbreaks possible | 15° /2° | 0.3 mm | 0.3 cm | |
| 19 Sept. | Thundery outbreaks possible | 8° /1° | 0.8 mm | 0.6 cm | |
| 20 Sept. | Sunny | 11° /2° | 0.2 mm | 0.1 cm | |
| 21 Sept. | Sunny | 12° /3° | 0 mm | 0 cm | |
| 22 Sept. | Overcast | 14° /5° | 1.3 mm | 0 cm | |
| 23 Sept. | Light rain shower | 11° /4° | 5.4 mm | 0.2 cm | |
| 24 Sept. | Patchy rain possible | 13° /3° | 0 mm | 0 cm | |
| 25 Sept. | Patchy light rain with thunder | 14° /3° | 1.9 mm | 0.3 cm | |
| 26 Sept. | Patchy rain possible | 11° /3° | 0.3 mm | 0 cm | |
| 27 Sept. | Cloudy | 9° /3° | 4.8 mm | 0 cm | |
| 28 Sept. | Moderate or heavy snow showers | 6° /0° | 6.2 mm | 4 cm | |
| 29 Sept. | Patchy rain possible | 4° /-2° | 2 mm | 1.7 cm | |
| 30 Sept. | Sunny | 5° /-2° | 0.2 mm | 0.1 cm | |
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Important Notice
Our weather forecast for Mongolia in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mongolia forecast closer to your planned date for the most up-to-date weather information.
Mongolia in September - FAQ
What are the expected maximum and minimum temperatures in Mongolia during September?
During September, expect a variety of temperatures with highs around 13° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Mongolia during September?
In September, Mongolia can expect light to moderate rainfall, totaling 43.2 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
Is snowfall common in Mongolia during September?
Mongolia experiences an average snowfall of 4 cm during September, occurring over 5 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Mongolia during September?
The average wind speed in Mongolia during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Mongolia in September?
As you prepare for your trip to Mongolia in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Mongolia, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Mongolia
Explore the daily rainfall trends and prepare for Mongolias September weather 💧
September snowfall in Mongolia
Track daily snowfall levels and discover Mongolia’s snowy potential this September ❄️
UV exposure in Mongolia during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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