# Duolun County

Duolun County (Mongolian: ᠳᠣᠯᠣᠨ ᠨᠠᠭᠤᠷ ᠰᠢᠶᠠᠨ; Chinese: 多伦县) is a county of Inner Mongolia, China. It is under the administration of Xilingol League.

## Climate

Duolun County has a dry, monsoon-influenced humid continental climate (Köppen Dwb), with bitterly cold and very dry winters, warm, humid summers, and strong winds, especially in spring. The monthly 24-hour average temperature ranges from −16.9 °C (1.6 °F) in January to 19.4 °C (66.9 °F) in July, with the annual mean at 2.78 °C (37.0 °F). The annual precipitation is 378 millimetres (14.9 in), with more than half of it falling in July and August alone. With monthly percent possible sunshine ranging from 56% in July to 77% in January and February, sunshine is abundant year-round, with 3,036 hours of bright sunshine annually.
The desertification in early 2000s has been largely checked by the effort of reforestation.
Climate data for Duolun County, elevation 1,245 m (4,085 ft), (1991–2020 normals) :
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 6.8 (44.2) | 13.9 (57.0) | 21.5 (70.7) | 28.8 (83.8) | 32.2 (90.0) | 35.0 (95.0) | 36.8 (98.2) | 34.1 (93.4) | 31.7 (89.1) | 25.0 (77.0) | 19.0 (66.2) | 12.3 (54.1) | 36.8 (98.2) |
| Mean daily maximum °C (°F) | −9.4 (15.1) | −4.1 (24.6) | 4.0 (39.2) | 12.8 (55.0) | 19.8 (67.6) | 24 (75) | 26.1 (79.0) | 24.8 (76.6) | 19.8 (67.6) | 11.6 (52.9) | 1.2 (34.2) | −7.2 (19.0) | 10.3 (50.5) |
| Daily mean °C (°F) | −16.3 (2.7) | −11.8 (10.8) | −3.3 (26.1) | 5.4 (41.7) | 12.6 (54.7) | 17.2 (63.0) | 19.7 (67.5) | 18.0 (64.4) | 12.1 (53.8) | 4.0 (39.2) | −5.7 (21.7) | −13.8 (7.2) | 3.2 (37.7) |
| Mean daily minimum °C (°F) | −21.7 (−7.1) | −17.9 (−0.2) | −9.7 (14.5) | −1.7 (28.9) | 4.8 (40.6) | 10.2 (50.4) | 13.7 (56.7) | 11.6 (52.9) | 5.2 (41.4) | −2.3 (27.9) | −11.1 (12.0) | −18.8 (−1.8) | −3.1 (26.4) |
| Record low °C (°F) | −38.4 (−37.1) | −35.9 (−32.6) | −30.1 (−22.2) | −16.3 (2.7) | −6.0 (21.2) | −2.8 (27.0) | 4.6 (40.3) | 1.7 (35.1) | −6.1 (21.0) | −16.2 (2.8) | −31.0 (−23.8) | −36.2 (−33.2) | −38.4 (−37.1) |
| Average precipitation mm (inches) | 1.6 (0.06) | 3.3 (0.13) | 5.6 (0.22) | 14.9 (0.59) | 33.8 (1.33) | 67.0 (2.64) | 104.3 (4.11) | 77.2 (3.04) | 48.8 (1.92) | 19.2 (0.76) | 7.7 (0.30) | 1.8 (0.07) | 385.2 (15.17) |
| Average precipitation days (≥ 0.1 mm) | 2.8 | 3.4 | 4.1 | 5.5 | 8.5 | 12.6 | 14.1 | 10.3 | 9.7 | 6.2 | 4.5 | 3.7 | 85.4 |
| Average snowy days | 9.2 | 8.7 | 8.1 | 4.7 | 1.0 | 0 | 0 | 0 | 0.3 | 4.0 | 8.2 | 10.9 | 55.1 |
| Average relative humidity (%) | 66 | 60 | 49 | 43 | 45 | 59 | 70 | 70 | 64 | 58 | 61 | 65 | 59 |
| Mean monthly sunshine hours | 213.9 | 220.4 | 261.0 | 262.2 | 278.7 | 252.2 | 244.5 | 253.2 | 238.2 | 235.3 | 201.8 | 198.3 | 2,859.7 |
| Percent possible sunshine | 73 | 73 | 70 | 65 | 61 | 55 | 53 | 60 | 65 | 70 | 70 | 70 | 65 |
| Source: China Meteorological Administration ||||||||||||||

## Administrative divisions

Duolun County is divided into 3 towns and 2 townships.
| Name | Simplified Chinese | Hanyu Pinyin | Mongolian (Hudum Script) | Mongolian (Cyrillic) | Administrative division code |
| Towns ||||||
| Dabeigou Town | 大北沟镇 | Dàběigōu Zhèn | ᠳ᠋ᠠ ᠪᠧᠢ ᠭᠧᠦ ᠪᠠᠯᠭᠠᠰᠤ | Да бей гүү балгас | 152531100 |
| Dolonnur Town | 多伦诺尔镇 | Duōlúnnuò'ěr Zhèn | ᠳᠣᠯᠣᠨ ᠨᠠᠭᠤᠷ ᠪᠠᠯᠭᠠᠰᠤ | Долон нуур балгас | 152531101 |
| Luanyuan Town | 滦源镇 | Luányuán Zhèn | ᠯᠤᠸᠠᠨ ᠶᠤᠸᠠᠨ ᠪᠠᠯᠭᠠᠰᠤ | Луан юан балгас | 152531102 |
| Townships ||||||
| Caimugou Township | 蔡木山乡 | Càimùshān Xiāng | ᠼᠠᠢ ᠮᠦ ᠱᠠᠨ ᠰᠢᠶᠠᠩ | Цай мү шин шиян | 152531201 |
| Xigangou Township | 西干沟乡 | Xīgàngōu Xiāng | ᠰᠢ ᠭᠠᠨ ᠭᠧᠦ ᠰᠢᠶᠠᠩ | Ший ган гүү шиян | 152531202 |
Other: Duolun New Industrial Chemical Zone (多伦新型工业化化工区)

## Historic sites

The Chinese state news agency Xinhua announced in January 2018 the discovery of ruins of an ancient palace that served as the summer retreat for the elite in the Liao Dynasty. The royal family and retinue would relocate each year from mid-April to mid-July to avoid the heat. More than 100 structural components at the site have been found and the foundations of 12 buildings have been recorded. Artifacts found include: glazed tiles, pottery and copper nails. Ge Zhiyong, a researcher with the Inner Mongolia Autonomous Region Institute of Archaeology, date the artifacts to the mid-Liao Dynasty. The dynasty was the first of many dynasties of nomadic origin to merge its nomadic structure and culture with the Chinese style of government.