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Weather & Climate in Orhaniye, Turkey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Orhaniye enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 40°F in January while summers reach 72°F in July. The area gets 290 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 25.4 inches (drier than the 38-inch national average). The city sits at an elevation of 548 feet.
Temperature
40°F Jan (4°C)
72°F Jul (22°C)
| Annual Average | 55.5°F |
| 3% above US avg | |
| January Average | 40°F (4°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 548 ft (167 m) |
| Area | 290.7 sq mi (753.0 km²) |
| Population Density | 3/sq mi |
| Coordinates | 40.5061°N, 29.6597°W |
| Timezone | Europe/Istanbul |
Precipitation & Snow
Air Quality
Earthquake History
3,937 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 | 32 km | 17 km |
| Nov 12, 1999 | 8 km S of Düzce, Turkey | M7.2 | 130 km | 10 km |
| Apr 23, 2025 | 24 km SE of Marmara Ereğlisi, Turkey | M6.2 | 129 km | 13 km |
| Sep 13, 1999 | 4 km SE of Köseköy, Turkey | M5.9 | 40 km | 13 km |
| Nov 11, 1999 | 5 km N of Sapanca, Turkey | M5.7 | 58 km | 22 km |
| Sep 26, 2019 | 17 km ESE of Marmara Ere?lisi, Turkey | M5.7 | 135 km | 8 km |
| Nov 12, 1999 | 7 km SSW of Düzce, Turkey | M5.5 | 127 km | 10 km |
| Aug 23, 2000 | 8 km E of Akyaz?, Turkey | M5.3 | 92 km | 15 km |
| Aug 19, 1999 | 3 km SSE of Ç?narc?k, Turkey | M5.2 | 46 km | 10 km |
| Sep 29, 1999 | 8 km NNW of Ta?köprü, Turkey | M5.2 | 37 km | 10 km |
| Aug 31, 1999 | 2 km NNE of Kar??yaka, Turkey | M5.2 | 33 km | 10 km |
| Aug 17, 1999 | 9 km SE of Akyaz?, Turkey | M5.1 | 88 km | 10 km |
| Nov 7, 1999 | 8 km E of Akyaz?, Turkey | M5.0 | 92 km | 10 km |
| Apr 23, 2025 | 14 km S of Kumburgaz, Turkey | M5.0 | 108 km | 10 km |
| Aug 17, 1999 | 2 km NW of Kullar, Turkey | M5.0 | 37 km | 10 km |
| Sep 9, 1999 | 7 km NNW of Koruköy, Turkey | M5.0 | 50 km | 13 km |
| Aug 17, 1999 | 11 km ESE of Akyaz?, Turkey | M4.9 | 94 km | 10 km |
| Apr 23, 2025 | 24 km SSW of Selimpaşa, Turkey | M4.9 | 123 km | 10 km |
| Sep 24, 2019 | 20 km SE of Marmara Ere?lisi, Turkey | M4.9 | 134 km | 10 km |
| Aug 17, 1999 | 9 km ESE of Köseköy, Turkey | M4.9 | 45 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
9 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 | 136 km |
| 1894 | MARMARA SEA | Earthquake | 4.5 m | 1,349 | 82 km |
| 1999 | KOCAELI, TURKEY | Earthquake | 2.5 m | 17,118 | 39 km |
| 1963 | MARMARA SEA | Earthquake | 1.0 m | 1 | 47 km |
| 2025 | MARMARA SEA | Earthquake | 0.1 m | — | 133 km |
| 1343 | MARMARA SEA, STRAIT OF BOSPORUS | Earthquake | — | — | 119 km |
| 986 | MARMARA SEA | Earthquake | — | — | 51 km |
| 551 | LEVANTIAN SEA | Earthquake | — | — | 39 km |
| 478 | MARMARA SEA | Earthquake | — | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 3.2 in | Coldest |
| February | 41°F (5°C) | 2.4 in | |
| March | 44°F (7°C) | 2.3 in | |
| April | 52°F (11°C) | 1.9 in | |
| May | 60°F (16°C) | 1.8 in | |
| June | 68°F (20°C) | 1.4 in | |
| July | 72°F (22°C) | 1.0 in | Driest |
| August | 72°F (22°C) | 1.1 in | Warmest |
| September | 66°F (19°C) | 1.6 in | |
| October | 58°F (14°C) | 2.6 in | |
| November | 50°F (10°C) | 2.8 in | |
| December | 44°F (6°C) | 3.3 in | Wettest |
Orhaniye has a seasonal temperature swing of 32°F / from 40°F in January to 72°F in August. Total annual precipitation is 25.4 inches, with December being the wettest month (3.3") and July the driest (1.0").