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Weather & Climate in Koşuboğazı, Turkey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Koşuboğazı enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 41°F in January while summers reach 73°F in July. The area gets 289 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 25.9 inches (drier than the 38-inch national average). The city sits at an elevation of 92 feet.
Temperature
41°F Jan (5°C)
73°F Jul (23°C)
| Annual Average | 57.4°F |
| 6% above US avg | |
| January Average | 41°F (5°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 289 days/yr |
Geography
| Elevation | 92 ft (28 m) |
| Area | 638.4 sq mi (1,653.5 km²) |
| Population Density | 2/sq mi |
| Coordinates | 40.0500°N, 28.2500°W |
| Timezone | Europe/Istanbul |
Precipitation & Snow
Air Quality
Earthquake History
7,341 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.2.
| Apr 23, 2025 | 24 km SE of Marmara Ereğlisi, Turkey | M6.2 | 87 km | 13 km |
| Aug 10, 2025 | 10 km WSW of Bigadiç, Turkey | M6.1 | 78 km | 10 km |
| May 19, 2011 | 12 km ENE of Simav, Turkey | M5.8 | 124 km | 7 km |
| Sep 26, 2019 | 17 km ESE of Marmara Ere?lisi, Turkey | M5.7 | 95 km | 8 km |
| Jan 22, 2020 | 15 km ESE of K?rka?aç, Turkey | M5.6 | 114 km | 6 km |
| Jul 25, 1999 | 14 km SW of Bigadiç, Turkey | M5.2 | 85 km | 10 km |
| Jun 26, 2020 | 13 km NW of Gölmarmara, Turkey | M5.2 | 146 km | 10 km |
| Sep 29, 1999 | 8 km NNW of Ta?köprü, Turkey | M5.2 | 120 km | 10 km |
| Aug 19, 1999 | 3 km SSE of Ç?narc?k, Turkey | M5.2 | 98 km | 10 km |
| May 3, 2012 | 13 km NE of Simav, Turkey | M5.2 | 121 km | 3 km |
| Feb 17, 2009 | 5 km ENE of Simav, Turkey | M5.2 | 125 km | 7 km |
| May 27, 2017 | 10 km NW of Gölmarmara, Turkey | M5.1 | 147 km | 10 km |
| Jul 25, 2011 | 25 km SW of Marmara Ere?lisi, Turkey | M5.1 | 94 km | 16 km |
| Sep 9, 1999 | 7 km NNW of Koruköy, Turkey | M5.0 | 106 km | 13 km |
| Jan 28, 2020 | Western Turkey | M5.0 | 110 km | 10 km |
| Apr 23, 2025 | 14 km S of Kumburgaz, Turkey | M5.0 | 95 km | 10 km |
| May 28, 2017 | 13 km WNW of Gölmarmara, Turkey | M4.9 | 149 km | 3 km |
| Jun 7, 2012 | 13 km SSW of Marmara Ere?lisi, Turkey | M4.9 | 93 km | 15 km |
| Jan 11, 2020 | 16 km S of Silivri, Turkey | M4.9 | 98 km | 10 km |
| Feb 4, 2020 | 13 km NNE of Akhisar, Turkey | M4.9 | 117 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
12 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1509 | MARMARA SEA | Earthquake | 6.0 m | 5,000 | 84 km |
| 1894 | MARMARA SEA | Earthquake | 4.5 m | 1,349 | 72 km |
| 1912 | MARMARA SEA | Eruption + Earthquake | 2.7 m | 2,800 | 122 km |
| 1963 | MARMARA SEA | Earthquake | 1.0 m | 1 | 106 km |
| 2025 | MARMARA SEA | Earthquake | 0.1 m | — | 88 km |
| 1935 | MARMARA SEA | Eruption + Earthquake | — | 5 | 93 km |
| 1343 | MARMARA SEA, STRAIT OF BOSPORUS | Earthquake | — | — | 84 km |
| 1265 | MARMARA SEA | Earthquake | — | — | 102 km |
| 986 | MARMARA SEA | Earthquake | — | — | 116 km |
| 557 | MARMARA SEA | Earthquake | — | — | 109 km |
| 543 | BLACK SEA | Earthquake | — | — | 47 km |
| 478 | MARMARA SEA | Earthquake | — | — | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Kula (165 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Kula | Pyroclastic cone(s) | 750 m (2,461 ft) | Unknown | 165 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.7 in | Coldest |
| February | 43°F (6°C) | 2.7 in | |
| March | 46°F (8°C) | 2.5 in | |
| April | 55°F (13°C) | 2.2 in | |
| May | 63°F (17°C) | 1.5 in | |
| June | 71°F (21°C) | 1.0 in | |
| July | 73°F (23°C) | 0.6 in | Warmest, Driest |
| August | 72°F (22°C) | 0.6 in | |
| September | 68°F (20°C) | 1.3 in | |
| October | 60°F (16°C) | 2.2 in | |
| November | 51°F (11°C) | 3.2 in | |
| December | 45°F (7°C) | 4.3 in | Wettest |
Koşuboğazı has a seasonal temperature swing of 32°F / from 41°F in January to 73°F in July. Total annual precipitation is 25.9 inches, with December being the wettest month (4.3") and July the driest (0.6").