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Weather & Climate in Heyun, China
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Heyun enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 53°F in January while summers reach 82°F in July. The area gets 239 sunny days per year, above the national average. Annual precipitation totals 104.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 269 feet.
Temperature
53°F Jan (11°C)
82°F Jul (28°C)
| Annual Average | 69.4°F |
| 29% above US avg | |
| January Average | 53°F (11°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 239 days/yr |
Geography
| Elevation | 269 ft (82 m) |
| Area | 7,349.7 sq mi (19,035.6 km²) |
| Population Density | 0/sq mi |
| Coordinates | 23.9303°N, 112.9189°W |
| Timezone | Asia/Shanghai |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Jul 31, 2016 | 31 km S of Babu, China | M4.9 | 148 km | 25 km |
| Sep 26, 1997 | 4 km NNW of Sanshui, China | M4.2 | 82 km | 33 km |
| Jun 23, 2025 | 13 km N of Qingyuan, China | M4.0 | 17 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
31 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Ragasa | Category 3 | — | 261 km |
| 2025 | Tapah | Category 1 | — | 239 km |
| 2025 | Wipha | Category 1 | — | 239 km |
| 2023 | Saola | Category 4 | 109 mph | 223 km |
| 2023 | Koinu | Category 3 | 92 mph | 258 km |
| 2021 | Cempaka | Category 1 | 81 mph | 263 km |
| 2018 | Mangkhut | Category 1 | 86 mph | 228 km |
| 2017 | Hato | Category 3 | 86 mph | 190 km |
| 2016 | Haima | Category 1 | 69 mph | 291 km |
| 2016 | Nida | Category 1 | 58 mph | 198 km |
| 2013 | Utor | Category 2 | 75 mph | 271 km |
| 2013 | Usagi | Category 1 | 92 mph | 200 km |
| 2012 | Vicente | Category 4 | 92 mph | 185 km |
| 2009 | Koppu | Category 1 | 75 mph | 250 km |
| 2003 | Dujuan | Category 2 | 69 mph | 161 km |
| 2001 | Utor | Category 1 | 52 mph | 230 km |
| 1999 | York | Category 1 | 63 mph | 198 km |
| 1999 | Sam | Category 1 | 63 mph | 185 km |
| 1999 | Maggie | Category 1 | 52 mph | 228 km |
| 1997 | Victor | Category 1 | 69 mph | 218 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).