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Jiashan, China

Full City Profile

137,112 Population 4,320/sq mi density
23 ft Elevation 7 meters
63°F Avg Temperature 17°C
Jiashan 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 Average63.4°F
17% above US avg
January Average42°F (5°C)
July Average84°F (29°C)
Sunny Days247 days/yr

Geography

Elevation23 ft (7 m)
Area31.7 sq mi (82.2 km²)
Population Density4,320/sq mi
Coordinates30.8492°N, 120.9258°W
TimezoneAsia/Shanghai

Precipitation & Snow

Annual Rainfall 55.6"
46% above US avg
Snowfall 1.4"
Wettest Month (Jun) 6.77"
Driest Month (Oct) 1.34"

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 93 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year Name Category Closest
2024 Bebinca Category 1 42 km
2022 Muifa Category 2 83 km
2021 Chanthu Category 2 227 km
2019 Lekima Category 2 153 km
2019 Mitag Category 1 279 km
2015 Chan-hom Category 2 186 km
2012 Haikui Category 1 254 km
2005 Khanun Category 3 71 km
2004 Rananim Category 2 284 km
2002 Rammasun Category 1 290 km
2000 Prapiroon Category 1 208 km
2000 Jelawat Category 1 192 km
1997 Winnie Category 1 204 km
1994 Ellie Category 1 260 km
1994 Doug Category 1 238 km
1990 Abe Category 2 57 km
1985 Mamie Category 1 119 km
1985 Jeff Category 1 296 km
1984 Ed Category 1 168 km
1981 Agnes Category 2 217 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 42°F (5°C) 1.8 in
February 41°F (5°C) 2.2 in Coldest
March 48°F (9°C) 2.6 in
April 59°F (15°C) 3.2 in
May 68°F (20°C) 4.3 in
June 75°F (24°C) 6.8 in Wettest
July 84°F (29°C) 5.7 in Warmest
August 82°F (28°C) 4.7 in
September 74°F (23°C) 5.2 in
October 65°F (18°C) 1.3 in Driest
November 54°F (12°C) 1.8 in
December 44°F (6°C) 1.8 in

Jiashan has a seasonal temperature swing of 42°F / from 41°F in February to 84°F in July. Total annual precipitation is 41.3 inches, with June being the wettest month (6.8") and October the driest (1.3").

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