Youyu County
右玉县
Yuyu
Youyu in Shuozhou
Youyu in Shuozhou
Shuozhou in Shanxi
Shuozhou in Shanxi
Coordinates: 39°59′20″N 112°28′01″E / 39.989°N 112.467°E / 39.989; 112.467
CountryPeople's Republic of China
ProvinceShanxi
Prefecture-level cityShuozhou
Area
  Total1,987 km2 (767 sq mi)
Population
 (2020)[1]
  Total88,212
  Density44/km2 (110/sq mi)
Time zoneUTC+8 (China Standard)
Youyu County
Traditional Chinese右玉
Simplified Chinese右玉
Former names
Shanwu
Traditional Chinese善無
Simplified Chinese善无
Yanmen Commandery
Traditional Chinese雁門
鴈門
Simplified Chinese雁门
Literal meaningYanmen Pass Commandery

Youyu County, also known by its Chinese name Youyuxian, is a county under the administration of the prefecture-level city of Shuozhou, in the northwest of Shanxi Province, China. It borders Inner Mongolia to the north and west.

History

Shanwu,[2] south of present-day Youyuxian, was the seat of Yanmen Commandery during the Qin and Western Han.[3] The post moved to Yinguan southeast of present-day Shuozhou under the Eastern Han and further south to Daixian under the Kingdom of Wei.[2]

Geography

Elevations are generally higher in the south of the county, in which flows the Cangtou River (苍头河); Youyu reaches a north-south extent of 67.7 km (42.1 mi) and east-west width of 45.7 km (28.4 mi). The Great Wall demarcates the northwestern border with Inner Mongolia's Liangcheng and Horinger counties; within the province, Youyu borders Zuoyun County to the east, Shanyin County and Pinglu District to the south.

Climate

Youyu has a monsoon-influenced, humid continental climate (Köppen Dwb), with cold and very dry winters, and warm, humid summers. The monthly 24-hour average temperature ranges from −14.3 °C (6.3 °F) in January to 19.9 °C (67.8 °F) in July, and the annual mean is 4.2 °C (39.6 °F). June thru September accounts for over three-fourths of the 407 millimetres (16.0 in) of annual precipitation. Due to the high elevation and dry climate, the diurnal temperature variation averages 16 °C (29 °F) annually.

Climate data for Youyu (1991–2020 normals, extremes 1971–2010)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 8.7
(47.7)
17.8
(64.0)
24.1
(75.4)
32.5
(90.5)
33.4
(92.1)
37.7
(99.9)
37.0
(98.6)
33.1
(91.6)
33.1
(91.6)
26.8
(80.2)
19.5
(67.1)
13.8
(56.8)
37.7
(99.9)
Mean daily maximum °C (°F) −4.2
(24.4)
0.4
(32.7)
7.3
(45.1)
15.4
(59.7)
21.6
(70.9)
25.7
(78.3)
27.1
(80.8)
25.3
(77.5)
20.5
(68.9)
13.5
(56.3)
4.7
(40.5)
−2.7
(27.1)
12.9
(55.2)
Daily mean °C (°F) −14
(7)
−9.2
(15.4)
−1.2
(29.8)
7.0
(44.6)
13.7
(56.7)
18.3
(64.9)
20.2
(68.4)
18.1
(64.6)
12.5
(54.5)
5.0
(41.0)
−3.8
(25.2)
−11.5
(11.3)
4.6
(40.3)
Mean daily minimum °C (°F) −21.7
(−7.1)
−17.1
(1.2)
−9.1
(15.6)
−1.8
(28.8)
4.6
(40.3)
10.2
(50.4)
13.6
(56.5)
11.7
(53.1)
5.5
(41.9)
−1.8
(28.8)
−10.3
(13.5)
−18.4
(−1.1)
−2.9
(26.8)
Record low °C (°F) −37.3
(−35.1)
−33.7
(−28.7)
−29.3
(−20.7)
−17.4
(0.7)
−12.6
(9.3)
−2.1
(28.2)
3.0
(37.4)
0.7
(33.3)
−8.0
(17.6)
−14.0
(6.8)
−32.2
(−26.0)
−35.5
(−31.9)
−37.3
(−35.1)
Average precipitation mm (inches) 2.5
(0.10)
4.2
(0.17)
8.8
(0.35)
21.5
(0.85)
41.0
(1.61)
58.2
(2.29)
105.6
(4.16)
94.5
(3.72)
55.8
(2.20)
25.9
(1.02)
8.4
(0.33)
2.1
(0.08)
428.5
(16.88)
Average precipitation days (≥ 0.1 mm) 2.7 3.4 4.7 4.8 6.7 10.7 12.4 12.0 9.3 5.9 3.7 3.0 79.3
Average snowy days 4.4 4.9 4.8 2.2 0.3 0 0 0 0 1.1 4.2 4.7 26.6
Average relative humidity (%) 61 56 48 43 44 55 68 72 69 64 62 61 59
Mean monthly sunshine hours 205.3 205.2 244.4 266.1 285.5 262.9 252.6 244.8 225.9 231.9 205.0 197.0 2,826.6
Percent possible sunshine 68 67 66 66 64 59 56 58 61 68 69 68 64
Source 1: China Meteorological Administration[4][5]
Source 2: Weather China[6]

References

Citations

  1. Shānxī: Prefectures, Cities, Districts and Counties
  2. 1 2 Xiong (2009), s.v. "Yanmen".
  3. Li (2017), s.v. "Yanmen".
  4. 中国气象数据网 – WeatherBk Data (in Simplified Chinese). China Meteorological Administration. Retrieved 26 August 2023.
  5. 中国气象数据网 (in Simplified Chinese). China Meteorological Administration. Retrieved 26 August 2023.
  6. 右玉 - 气象数据 -中国天气网 (in Chinese). Weather China. Retrieved 24 November 2022.

Bibliography


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