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Weather & Climate in Siwei, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Siwei experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 26°F in January while summers reach 78°F in July. The area gets 301 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 19.3 inches (drier than the 38-inch national average). The city sits at an elevation of 787 feet.
Temperature
26°F Jan (-3°C)
78°F Jul (26°C)
| Annual Average | 54.2°F |
| 0% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 787 ft (240 m) |
| Area | 631.9 sq mi (1,636.7 km²) |
| Population Density | 27/sq mi |
| Coordinates | 38.0166°N, 114.1533°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
13 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Jan 28, 1991 | 4 km WNW of Xinzhou, China | M5.0 | 136 km | 33 km |
| Apr 21, 2002 | 39 km N of Xingtai, China | M4.8 | 77 km | 26 km |
| Sep 2, 2002 | 6 km E of Taiyuan, China | M4.7 | 135 km | 26 km |
| Jun 5, 2010 | 23 km SSW of Xinzhou, China | M4.7 | 134 km | 10 km |
| Apr 6, 2016 | 23 km NE of Yuanping, China | M4.4 | 145 km | 10 km |
| Mar 28, 2009 | 25 km NE of Yuanping, China | M4.4 | 142 km | 10 km |
| Jun 26, 1993 | 52 km NW of Tianchang, China | M4.4 | 59 km | 33 km |
| Sep 20, 1991 | 111 km SE of Datong, China | M3.9 | 144 km | 10 km |
| Aug 25, 2003 | 20 km NW of Xinzhou, China | M3.8 | 149 km | 10 km |
| Mar 12, 1990 | 71 km NW of Hecun, China | M3.7 | 120 km | 33 km |
| Feb 23, 1991 | 44 km SSW of Yangquan, China | M3.5 | 87 km | 33 km |
| Apr 24, 1993 | 81 km ENE of Yuanping, China | M3.5 | 132 km | 33 km |
| Jun 24, 1992 | 20 km N of Nangong, China | M3.5 | 118 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 0.1 in | Coldest, Driest |
| February | 32°F (-0°C) | 0.2 in | |
| March | 43°F (6°C) | 0.4 in | |
| April | 58°F (14°C) | 0.9 in | |
| May | 68°F (20°C) | 1.3 in | |
| June | 76°F (25°C) | 1.9 in | |
| July | 78°F (26°C) | 5.5 in | Warmest, Wettest |
| August | 76°F (24°C) | 5.2 in | |
| September | 67°F (19°C) | 2.1 in | |
| October | 56°F (13°C) | 1.0 in | |
| November | 41°F (5°C) | 0.6 in | |
| December | 30°F (-1°C) | 0.1 in |
Siwei has a seasonal temperature swing of 52°F / from 26°F in January to 78°F in July. Total annual precipitation is 19.3 inches, with July being the wettest month (5.5") and January the driest (0.1").