Dayun, China

Full City Profile

30 ft Elevation 9 meters

63°F Avg Temperature 17°C

Dayun enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 42°F in January while summers reach 84°F in July. The area gets 247 sunny days per year. Annual precipitation totals 55.6 inches. The area receives 1.4 inches of snow annually.

Temperature

42°F Jan (5°C) 84°F Jul (29°C)

Annual Average	63.4°F
	17% above US avg
January Average	42°F (5°C)
July Average	84°F (29°C)
Sunny Days	247 days/yr

Geography

Elevation	30 ft (9 m)
Area	11.1 sq mi (28.7 km²)
Population Density	0/sq mi
Coordinates	30.7828°N, 120.9461°W
Timezone	Asia/Shanghai

Precipitation & Snow

Annual Rainfall 55.6"

46% above US avg

Snowfall 1.4"

Air Quality

Earthquake History

1 earthquake (M2.5+) within 150 km since 1990. Strongest: M5.0. Most recent: M5.0 on Feb 9, 1990.

Feb 9, 1990	27 km E of Changshu City, China	M5.0	100 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

21 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 3. Most recent: Bebinca (2024).

Year	Name	Category	Closest
2024	Bebinca	Category 1	49 km
2022	Muifa	Category 2	86 km
2021	Chanthu	Category 2	225 km
2019	Lekima	Category 2	147 km
2019	Mitag	Category 1	271 km
2015	Chan-hom	Category 2	183 km
2012	Haikui	Category 1	247 km
2005	Khanun	Category 3	69 km
2004	Rananim	Category 2	277 km
2002	Rammasun	Category 1	290 km
2000	Prapiroon	Category 1	206 km
2000	Jelawat	Category 1	184 km
1997	Winnie	Category 1	197 km
1994	Seth	Category 1	296 km
1994	Ellie	Category 1	264 km
1994	Doug	Category 1	235 km
1990	Abe	Category 2	56 km
1985	Mamie	Category 1	122 km
1985	Jeff	Category 1	288 km
1984	Ed	Category 1	172 km

Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1991	AOSHAN	Meteorological	3.0 m	—	147 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

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