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Weather & Climate in Bonan, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bonan enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 48°F in January while summers reach 69°F in July. The area gets 269 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 37.1 inches. The city sits at an elevation of 5,358 feet.
Temperature
48°F Jan (9°C)
69°F Jul (21°C)
| Annual Average | 60.3°F |
| 12% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 5,358 ft (1,633 m) |
| Area | 287.8 sq mi (745.3 km²) |
| Population Density | 194/sq mi |
| Coordinates | 25.4634°N, 99.5283°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
156 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.1.
| May 21, 2021 | 25 km NW of Dali, China | M6.1 | 56 km | 9 km |
| Oct 27, 2001 | 74 km SE of Lijiang, China | M5.6 | 147 km | 10 km |
| Apr 12, 2001 | 147 km SW of Dali, China | M5.6 | 91 km | 10 km |
| May 2, 2023 | 26 km WSW of Bonan, China | M5.3 | 27 km | 10 km |
| Mar 3, 2013 | 59 km NW of Dali, China | M5.2 | 64 km | 8 km |
| May 21, 2021 | 22 km WNW of Dali, China | M5.2 | 55 km | 10 km |
| Apr 17, 2013 | 59 km NW of Dali, China | M5.1 | 60 km | 38 km |
| May 21, 2021 | 21 km W of Dali, China | M5.1 | 48 km | 10 km |
| Aug 9, 2011 | 143 km ESE of Myitkyina, Myanmar | M5.1 | 100 km | 40 km |
| May 21, 2021 | 24 km WNW of Dali, China | M5.1 | 52 km | 10 km |
| Jan 1, 2010 | 73 km SSW of Lijiang, China | M5.0 | 98 km | 10 km |
| May 21, 2021 | 32 km NW of Dali, China | M5.0 | 63 km | 10 km |
| May 21, 2021 | 29 km NNW of Dali, China | M5.0 | 73 km | 10 km |
| Jun 20, 2011 | 137 km ESE of Myitkyina, Myanmar | M5.0 | 92 km | 39 km |
| Mar 26, 2017 | 54 km NW of Dali, China | M5.0 | 61 km | 28 km |
| Sep 11, 2012 | 140 km SW of Dali, China | M5.0 | 95 km | 10 km |
| Jun 4, 2025 | 21 km SSE of Jinhua, China | M5.0 | 112 km | 10 km |
| Apr 23, 2025 | 17 km SE of Jinhua, China | M4.9 | 117 km | 10 km |
| May 17, 2016 | 88 km NW of Dali, China | M4.9 | 65 km | 54 km |
| Jun 1, 2010 | 117 km SW of Dali, China | M4.9 | 65 km | 40 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 30.0 m (98 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2009 | XIAOWAN RESERVOIR, YUNNAN PROVINCE | Meteorological | 30.0 m | 2 | 93 km |
| 1951 | CHINA: GANSU AND SHANXI PROVINCES | Earthquake | 2.0 m | - | 145 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Tengchong (107 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Tengchong | Pyroclastic cone(s) | 2,865 m (9,400 ft) | -5750 | 107 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 0.6 in | Coldest, Driest |
| February | 51°F (11°C) | 1.3 in | |
| March | 57°F (14°C) | 1.9 in | |
| April | 62°F (16°C) | 2.2 in | |
| May | 67°F (19°C) | 2.5 in | |
| June | 69°F (21°C) | 5.3 in | Warmest |
| July | 69°F (21°C) | 6.0 in | |
| August | 69°F (20°C) | 6.3 in | Wettest |
| September | 67°F (19°C) | 4.6 in | |
| October | 62°F (17°C) | 4.1 in | |
| November | 55°F (13°C) | 1.5 in | |
| December | 49°F (9°C) | 0.7 in |
Bonan has a seasonal temperature swing of 21°F / from 48°F in January to 69°F in June. Total annual precipitation is 37.0 inches, with August being the wettest month (6.3") and January the driest (0.6").