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Si Wilai, Thailand

Full City Profile

11,139 Population 19/sq mi density
574 ft Elevation 175 meters
77°F Avg Temperature 25°C
Si Wilai has a warm climate with an average annual temperature of 77°F (25°C). Winters average 70°F in January while summers reach 83°F in July. The area gets 322 sunny days per year. Annual precipitation totals 99.8 inches. The area receives 0.0 inches of snow annually.

Temperature

70°F Jan (21°C) 83°F Jul (28°C)
Annual Average76.6°F
42% above US avg
January Average70°F (21°C)
July Average83°F (28°C)
Sunny Days322 days/yr

Geography

Elevation574 ft (175 m)
Area593.9 sq mi (1,538.3 km²)
Population Density19/sq mi
Coordinates18.1819°N, 103.7479°W
TimezoneAsia/Bangkok

Precipitation & Snow

Annual Rainfall 99.8"
163% above US avg
Snowfall 0.0"
Wettest Month (Jul) 23.30"
Driest Month (Jan) 0.20"

Air Quality

Earthquake History

1 earthquake (M2.5+) within 150 km since 1990. Strongest: M4.5. Most recent: M4.5 on May 26, 2015.

May 26, 2015 73 km ESE of Muang Phônsavan, Laos M4.5 112 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

12 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 2. Most recent: Kajiki (2025).

Year Name Category Closest
2025 Kajiki Category 2 211 km
2025 Bualoi Category 1 259 km
2017 Doksuri Category 1 167 km
2013 Wutip Category 1 126 km
2007 Lekima Category 1 293 km
1996 Niki Category 1 281 km
1995 Lois Category 1 217 km
1991 Fred Category 1 271 km
1990 Becky Category 1 294 km
1989 Brian Category 1 288 km
1985 Cecil Category 1 267 km
1982 Nancy Category 1 215 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 70°F (21°C) 0.2 in Driest
February 70°F (21°C) 0.8 in
March 75°F (24°C) 2.3 in
April 79°F (26°C) 4.1 in
May 82°F (28°C) 14.8 in
June 83°F (29°C) 20.0 in Warmest
July 83°F (28°C) 23.3 in Wettest
August 82°F (28°C) 22.9 in
September 80°F (27°C) 13.6 in
October 78°F (25°C) 3.6 in
November 73°F (23°C) 0.8 in
December 68°F (20°C) 0.2 in Coldest

Si Wilai has a seasonal temperature swing of 15°F / from 68°F in December to 83°F in June. Total annual precipitation is 106.6 inches, with July being the wettest month (23.3") and January the driest (0.2").

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