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Weather & Climate in Sunāmganj, Bangladesh
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sunāmganj has a warm climate with an average annual temperature of 76°F (25°C). Winters average 64°F in January while summers reach 83°F in July / relatively mild seasonal variation. The area gets 178 sunny days per year. Annual precipitation totals 126.8 inches (wetter than the 38-inch national average). The city sits at an elevation of 46 feet.
Temperature
64°F Jan (18°C)
83°F Jul (28°C)
| Annual Average | 76.4°F |
| 41% above US avg | |
| January Average | 64°F (18°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 178 days/yr |
Geography
| Elevation | 46 ft (14 m) |
| Area | 288.5 sq mi (747.2 km²) |
| Population Density | 258/sq mi |
| Coordinates | 25.0689°N, 91.4024°W |
| Timezone | Asia/Dhaka |
Precipitation & Snow
Air Quality
Earthquake History
105 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| May 8, 1997 | 11 km WNW of Kar?mganj, India | M6.0 | 88 km | 35 km |
| Jan 3, 2017 | 18 km ENE of ?mb?sa, India | M5.7 | 133 km | 32 km |
| Nov 19, 1996 | India-Bangladesh border region | M5.4 | 140 km | 50 km |
| Aug 14, 2023 | 16 km NW of Karīmganj, India | M5.3 | 86 km | 37 km |
| Jul 7, 2021 | 8 km SSE of Lakhipur, India | M5.3 | 145 km | 10 km |
| Mar 2, 2013 | 25 km SSW of Kar?mganj, India | M5.2 | 94 km | 39 km |
| Oct 5, 1999 | 18 km NE of Dispur, India | M5.2 | 143 km | 33 km |
| Feb 25, 1992 | 38 km NNW of Kar?mganj, India | M5.0 | 84 km | 33 km |
| Jun 16, 2023 | India-Bangladesh border region | M5.0 | 73 km | 10 km |
| Feb 15, 2005 | 9 km W of L?la, India | M5.0 | 127 km | 35 km |
| Apr 5, 2016 | 38 km SE of Lakhipur, India | M5.0 | 115 km | 10 km |
| Dec 12, 1992 | 15 km ESE of Nongstoin, India | M5.0 | 45 km | 41 km |
| Nov 8, 2017 | 28 km N of Agartala, India | M4.9 | 109 km | 30 km |
| Oct 2, 2023 | 28 km S of Goālpāra, India | M4.9 | 126 km | 10 km |
| Aug 6, 1997 | 31 km ENE of Shillong, India | M4.9 | 101 km | 41 km |
| Oct 14, 2002 | 19 km SE of Jahedpur, Bangladesh | M4.9 | 56 km | 33 km |
| Feb 2, 1991 | 3 km NE of Nongstoin, India | M4.9 | 54 km | 33 km |
| Sep 9, 2023 | 19 km ENE of Lāla, India | M4.8 | 147 km | 48 km |
| Aug 22, 1991 | 34 km W of Chh?tak, Bangladesh | M4.7 | 9 km | 33 km |
| Sep 2, 1991 | 19 km NNE of Kishorganj, Bangladesh | M4.7 | 77 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
6 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2020 | Amphan | Category 2 | 75 mph | 291 km |
| 2007 | Sidr | Category 3 | — | 185 km |
| 1997 | Unnamed | Category 3 | — | 210 km |
| 1997 | Unnamed | Category 1 | — | 174 km |
| 1991 | Unnamed | Category 4 | 35 mph | 240 km |
| 1988 | Unnamed | Category 3 | 132 mph | 249 km |
Source: NOAA IBTrACS (Category 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 |
| 1897 | ASSAM | Earthquake | 3.0 m | 1,542 | 125 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 64°F (18°C) | 0.4 in | Coldest |
| February | 68°F (20°C) | 0.9 in | |
| March | 75°F (24°C) | 3.7 in | |
| April | 80°F (26°C) | 10.1 in | |
| May | 81°F (27°C) | 16.9 in | |
| June | 82°F (28°C) | 24.4 in | |
| July | 83°F (28°C) | 25.9 in | Wettest |
| August | 83°F (28°C) | 19.7 in | Warmest |
| September | 82°F (28°C) | 16.2 in | |
| October | 80°F (27°C) | 7.4 in | |
| November | 73°F (23°C) | 1.0 in | |
| December | 67°F (19°C) | 0.3 in | Driest |
Sunāmganj has a seasonal temperature swing of 19°F / from 64°F in January to 83°F in August. Total annual precipitation is 126.8 inches, with July being the wettest month (25.9") and December the driest (0.3").