Inner Mongolia Weather in September

With the arrival of autumn, Inner Mongolia weather in September gets increasingly cool, but the trend is not stable and fluctuating temperatures are common. To be specific, the west is mostly pleasant and warm during daytime, while the east is crisp and chilly. As the local rainy season ends, the precipitation drops back to a low level and leads to dry air throughout the whole region. Luckily, the sunlight remains abundant and bright. Colorful autumn views also become available for visitors, but you need to mind the regional variations.
 The general temperature trend in September is downward, but in view of the large areas of Inner Mongolia, there exist some regional differences and the west is around 5 - 10 degrees Celsius (41 - 50 degrees Fahrenheit) warmer than the east.

For western Inner Mongolia, the daytime high temperatures usually fluctuate between 19 and 26°C (66 - 79°F) and the low degrees between 9 and 15°C (48 - 59°F), which brings warm days but cool nights. While, the weather of eastern Inner Mongolia in September is crisp and chilly as the daily highs normally range from 14 to 22°C (57 - 72°F) and the night lows from 5 to 11°C (41 - 52°F).

Please also note due to the fluctuating temperatures, the actual weather condition in September is somewhat complicated. Both lingering heat in summer and large temperature drops occur randomly during this month. For several days, the max temperatures might be high around 28°C (82°F) and by the late half, the min degrees could drop to around 0°C (32°F) especially in the east. Visitors had better prepare multiple layers of clothes so as to adjust your dressing accordingly.
 As the local rainy season has passed, the whole region experiences significant precipitation decreases. The monthly average precipitation is relatively low, varying from 40 - 60 mm (1.57 - 2.36 in) in different parts, distributed over 8 days around. Therefore, Inner Mongolia climate in September becomes dry and occasional strong winds further aggravate this situation. 

The primary precipitation forms are drizzles and brief showers, but they are actually not frequent. In light rain, you could walk for minutes to find shelters with only a little wet. In general, the low precipitation doesn’t interrupt your schedule. By late September, the northeastern Inner Mongolia might see light snowfall, for example Mordaga National Forest Park around the Great Khingan areas. But it usually melts soon and leaves little accumulated snow.
 In most places of Inner Mongolia, the daytime is around 13.5 hours at the beginning of September; with later sunrise and earlier sunset, it decreases to about 12 hours by the end of this month, but still ample for day trips overall. In different parts, the sunrise time ranges from 5:10 - 7:00 and sunset time from 19:40 - 17:40. On the same day, the sunrise and sunset in the most northeastern Hulunbuir is about 1 hour earlier than the most southwestern Alxa.

Thanks to the low rainfall, the region enjoys an average sunlight time of 8 hours approximately per day, meaning the climate of Inner Mongolia in September is clear and sunny. With high visibility, visitors could conduct their most sightseeing under azure sky and bright sunshine. However, don’t slack on sun protection though the UV index falls a little to level 7.
 Certainly yes! September is a good time to visit both western and eastern Inner Mongolia.

From the perspective of weather, September experiences no extremely high or low temperatures, so it is generally pleasant for visiting most natural attractions. You will not feel hot when having fun in Singing Sand Ravine or hiking on grasslands. In addition, plenty of sunny days could give you a good mood and beautiful pictures. 

In terms of natural scenery, colorful autumn scenery is the highlight of Inner Mongolia in September. The grasslands and forests start to turn yellow and red gradually so that you can see distinctive views in different periods of this month. The yellowish green landscape in early September becomes golden by the middle month, seeming like an oil painting in rich colors. 

Moreover, the peak season of Inner Mongolia travel has ended. Therefore, large crowds could be rarely seen; at the same time, the prices of accommodation and transportation also witness slight drop. It means that you can have a relatively economical and quiet trip.
  Clothes for Eastern Part: For tops, you can match shirts, hoodies or knit wear with woolen coats, or fleece-lined leather coats during daytime, even thin down coats at night. For bottoms, it is suggested to bring thick sweatpants and jeans. Dress for girls should be thick and long, and go with thermal leggings underneath. Also, prepare bottoming shirts and long johns to deal with sudden temperature drops.

 Clothes for Western Part: T-shirts suit most middays, but you need change them into long-sleeved ones or put on thick coats like jackets and trench coats in other times of the day. 3-in-1 windbreaker is highly recommended for suburban areas whose temperatures are changeable. As for lower body, common long trousers and a pair of padded ones can handle most situations.

 Shoes: Light and comfortable shoes are good choices for both parts; or, you can wear walking boots as alternatives. Then, remember to pack socks of different thickness. 

 Others: Hats, sunglasses and scarves not only help to prevent sunlight and wind, but also act as lovely accessories to improve your dressing. Skin-care products such as moisturizing cream are necessary in the dry September.
 1. For places to enjoy charming autumn scenery, you are more suggested to choose mountain and forest areas, for example Ergun National Wetland Park and Arxan National Forest Park in northeast Inner Mongolia, Hadamen National Forest Park around Hohhot and Ulan Butung Scenic Area in the central as well as Populus Euphratica Forest in Ejina of the westmost part. You can choose one or two closer attractions according to your travel schedule.

2. For most places, the best period of admiring golden autumn is after middle September, but it is just for references since the specific time might be of slight differences due to the wide span of Inner Mongolia. The plants in the east tends to turn yellow the earliest and these in the west the latest. Besides, it is also highly dependent on real-time weather conditions of the certain year and you should further confirm the situation before you visit there.

3. The Mid-Autumn Festival in 2026 falls on September 25 and the holiday lasts for three days to September 27. It is close to the next holiday of China's  National Day (Oct.1 - 7), only three days between them, so many local residents choose to enjoy the two holidays together. It means this the last week of September is more crowded than the past years when there will be long queues and large crowds in almost every scenic spot. You had better avoid this period.