|Country||People's Republic of China|
|Township-level divisions||1 subdistrict|
|County seat||Sunwuchengqu Subdistrict (孙吴城区街道)|
|• Total||4,448 km2 (1,717 sq mi)|
|Elevation||226 m (741 ft)|
|• Density||24/km2 (61/sq mi)|
|Time zone||UTC+8 (China Standard)|
Sunwu County (simplified Chinese :孙吴县; traditional Chinese :孫吳縣; pinyin :Sūnwú Xiàn) is a county under the administration of Heihe City in the north of Heilongjiang province, China, situated on the bank of Amur River, which demarcates the Sino-Russian border. The length of border line within Sunwu county is 36 km (22 mi).
Sunwu County is surrounded by Lesser Khingan Mountains, and its forest coverage is 45%. The urbanization level is 40%.[ citation needed ]
Sunwu County has a monsoon-influenced humid continental climate (Köppen Dwb) with very warm, humid summers and severely cold, extremely dry winters. The monthly 24-hour average temperature ranges from −23.3 °C (−9.9 °F) in January to 20.4 °C (68.7 °F), while the annual mean is +0.18 °C (32.3 °F). More than three-fourths of the annual precipitation occurs from June to September. With monthly percent possible sunshine ranging from 52% in July to 73% in February, the area receives 2,576 hours of bright sunshine annually.
|Climate data for Sunwu County (1981–2010 normals)|
|Average high °C (°F)||−15.1|
|Daily mean °C (°F)||−23.3|
|Average low °C (°F)||−29.2|
|Average precipitation mm (inches)||5.9|
|Average precipitation days (≥ 0.1 mm)||7.3||4.5||5.3||8.4||11.0||13.9||15.4||14.3||12.5||7.9||7.1||7.8||115.4|
|Average relative humidity (%)||73||70||63||57||57||70||80||82||74||64||70||75||70|
|Mean monthly sunshine hours||170.3||206.3||246.2||223.1||258.3||263.3||252.9||238.4||210.9||194.8||163.8||147.6||2,575.9|
|Percent possible sunshine||64||73||67||54||55||55||52||54||56||58||60||58||58|
|Source: China Meteorological Administration (precipitation days and sunshine 1971–2000)|
There is one subdistrict, two towns and nine townships in the county:
The only subdistrict is Sunwuchengqu Subdistrict (孙吴城区街道)
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