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Weather & Climate in Termal, Turkey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Termal experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 42°F in January while summers reach 71°F in July. The area gets 298 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 51.1 inches (wetter than the 38-inch national average). The area receives 31.0 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 443 feet.
Temperature
42°F Jan (6°C)
71°F Jul (21°C)
| Annual Average | 54.6°F |
| 1% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 71°F (21°C) |
| Sunny Days | 298 days/yr |
Geography
| Elevation | 443 ft (135 m) |
| Area | 72.8 sq mi (188.6 km²) |
| Population Density | 93/sq mi |
| Coordinates | 40.6074°N, 29.1731°W |
| Timezone | Europe/Istanbul |
Precipitation & Snow
Air Quality
Earthquake History
4,269 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.6.
| Aug 17, 1999 | 4 km ESE of Derince, Turkey | M7.6 | 60 km | 17 km |
| Apr 23, 2025 | 24 km SE of Marmara Ereğlisi, Turkey | M6.2 | 87 km | 13 km |
| Sep 13, 1999 | 4 km SE of Köseköy, Turkey | M5.9 | 74 km | 13 km |
| Sep 26, 2019 | 17 km ESE of Marmara Ere?lisi, Turkey | M5.7 | 92 km | 8 km |
| Nov 11, 1999 | 5 km N of Sapanca, Turkey | M5.7 | 93 km | 22 km |
| Aug 23, 2000 | 8 km E of Akyaz?, Turkey | M5.3 | 131 km | 15 km |
| Aug 19, 1999 | 3 km SSE of Ç?narc?k, Turkey | M5.2 | 3 km | 10 km |
| Sep 29, 1999 | 8 km NNW of Ta?köprü, Turkey | M5.2 | 21 km | 10 km |
| Aug 31, 1999 | 2 km NNE of Kar??yaka, Turkey | M5.2 | 67 km | 10 km |
| Jul 25, 2011 | 25 km SW of Marmara Ere?lisi, Turkey | M5.1 | 122 km | 16 km |
| Aug 17, 1999 | 9 km SE of Akyaz?, Turkey | M5.1 | 128 km | 10 km |
| Nov 7, 1999 | 8 km E of Akyaz?, Turkey | M5.0 | 131 km | 10 km |
| Apr 23, 2025 | 14 km S of Kumburgaz, Turkey | M5.0 | 66 km | 10 km |
| Aug 17, 1999 | 2 km NW of Kullar, Turkey | M5.0 | 69 km | 10 km |
| Sep 9, 1999 | 7 km NNW of Koruköy, Turkey | M5.0 | 13 km | 13 km |
| Aug 17, 1999 | 9 km ESE of Köseköy, Turkey | M4.9 | 80 km | 10 km |
| Apr 23, 2025 | 24 km SSW of Selimpaşa, Turkey | M4.9 | 80 km | 10 km |
| Jun 7, 2012 | 13 km SSW of Marmara Ere?lisi, Turkey | M4.9 | 109 km | 15 km |
| Sep 24, 2019 | 20 km SE of Marmara Ere?lisi, Turkey | M4.9 | 91 km | 10 km |
| Jan 11, 2020 | 16 km S of Silivri, Turkey | M4.9 | 86 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
13 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 | 93 km |
| 1894 | MARMARA SEA | Earthquake | 4.5 m | 1,349 | 40 km |
| 1999 | KOCAELI, TURKEY | Earthquake | 2.5 m | 17,118 | 69 km |
| 1963 | MARMARA SEA | Earthquake | 1.0 m | 1 | 10 km |
| 2025 | MARMARA SEA | Earthquake | 0.1 m | - | 91 km |
| 1935 | MARMARA SEA | Eruption + Earthquake | - | 5 | 145 km |
| 1343 | MARMARA SEA, STRAIT OF BOSPORUS | Earthquake | - | - | 77 km |
| 1265 | MARMARA SEA | Earthquake | - | - | 150 km |
| 986 | MARMARA SEA | Earthquake | - | - | 22 km |
| 557 | MARMARA SEA | Earthquake | - | - | 136 km |
| 551 | LEVANTIAN SEA | Earthquake | - | - | 65 km |
| 543 | BLACK SEA | Earthquake | - | - | 121 km |
| 478 | MARMARA SEA | Earthquake | - | - | 22 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 3.5 in | |
| February | 40°F (4°C) | 2.7 in | Coldest |
| March | 43°F (6°C) | 2.5 in | |
| April | 52°F (11°C) | 2.1 in | |
| May | 59°F (15°C) | 1.7 in | |
| June | 67°F (19°C) | 1.3 in | |
| July | 71°F (21°C) | 0.9 in | Warmest, Driest |
| August | 70°F (21°C) | 1.0 in | |
| September | 65°F (18°C) | 1.5 in | |
| October | 57°F (14°C) | 2.5 in | |
| November | 49°F (10°C) | 3.0 in | |
| December | 43°F (6°C) | 3.8 in | Wettest |
Termal has a seasonal temperature swing of 31°F / from 40°F in February to 71°F in July. Total annual precipitation is 26.5 inches, with December being the wettest month (3.8") and July the driest (0.9").