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Weather & Climate in Jiannan, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Jiannan enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 40°F in January while summers reach 78°F in July. The area gets 201 sunny days per year. Annual precipitation totals 73.7 inches (wetter than the 38-inch national average). The area receives 3.1 inches of snow annually. The city sits at an elevation of 2,152 feet.
Temperature
40°F Jan (5°C)
78°F Jul (25°C)
| Annual Average | 59.3°F |
| 10% above US avg | |
| January Average | 40°F (5°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 201 days/yr |
Geography
| Elevation | 2,152 ft (656 m) |
| Area | 39.3 sq mi (101.8 km²) |
| Population Density | 0/sq mi |
| Coordinates | 30.4392°N, 108.5340°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
10 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Aug 16, 2025 | 37 km WSW of Bishan, China | M4.5 | 140 km | 13 km |
| Jul 15, 1997 | 69 km WSW of Lichuan, China | M4.5 | 49 km | 33 km |
| Aug 11, 2016 | 68 km N of Fuling, China | M4.4 | 120 km | 15 km |
| Jul 18, 2013 | 66 km SSW of Wanxian, China | M4.4 | 42 km | 44 km |
| Jul 14, 1990 | 107 km NE of Wanxian, China | M4.4 | 136 km | 30 km |
| Dec 5, 1993 | 72 km ENE of Fuling, China | M4.3 | 66 km | 5 km |
| Jul 16, 2012 | 26 km SE of Fuling, China | M4.2 | 138 km | 7 km |
| May 30, 2012 | 72 km WSW of Lichuan, China | M4.1 | 53 km | 10 km |
| Feb 10, 2005 | 41 km WNW of Lichuan, China | M4.1 | 12 km | 24 km |
| Jan 29, 1993 | 65 km SSW of Wanxian, China | M3.6 | 47 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 13.1 m (43 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2008 | WU GORGE, WUSHAN COUNTY | Meteorological | 13.1 m | — | 150 km |
| 2015 | WUSHAN, CHONGQING | Meteorological | 6.2 m | 2 | 148 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 0.8 in | Coldest, Driest |
| February | 43°F (6°C) | 0.9 in | |
| March | 50°F (10°C) | 2.3 in | |
| April | 60°F (15°C) | 5.2 in | |
| May | 67°F (20°C) | 6.9 in | |
| June | 73°F (23°C) | 7.2 in | |
| July | 78°F (25°C) | 7.8 in | Wettest |
| August | 78°F (26°C) | 5.9 in | Warmest |
| September | 70°F (21°C) | 7.0 in | |
| October | 61°F (16°C) | 4.6 in | |
| November | 51°F (11°C) | 2.3 in | |
| December | 43°F (6°C) | 1.1 in |
Jiannan has a seasonal temperature swing of 38°F / from 40°F in January to 78°F in August. Total annual precipitation is 52.0 inches, with July being the wettest month (7.8") and January the driest (0.8").