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Weather & Climate in Cumayeri, Turkey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cumayeri enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 43°F in January while summers reach 71°F in July. The area gets 268 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 48.3 inches (wetter than the 38-inch national average). The area receives 28.8 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 427 feet.
Temperature
43°F Jan (6°C)
71°F Jul (22°C)
| Annual Average | 56.6°F |
| 5% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 427 ft (130 m) |
| Area | 54.7 sq mi (141.7 km²) |
| Population Density | 195/sq mi |
| Coordinates | 40.8739°N, 30.9509°W |
| Timezone | Europe/Istanbul |
Precipitation & Snow
Air Quality
Earthquake History
1,106 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 | 93 km | 17 km |
| Nov 12, 1999 | 8 km S of Düzce, Turkey | M7.2 | 22 km | 10 km |
| Sep 13, 1999 | 4 km SE of Köseköy, Turkey | M5.9 | 78 km | 13 km |
| Nov 11, 1999 | 5 km N of Sapanca, Turkey | M5.7 | 59 km | 22 km |
| Nov 12, 1999 | 7 km SSW of Düzce, Turkey | M5.5 | 17 km | 10 km |
| Aug 23, 2000 | 8 km E of Akyaz?, Turkey | M5.3 | 29 km | 15 km |
| Nov 12, 1999 | 11 km W of Bolu, Turkey | M5.2 | 46 km | 10 km |
| Aug 31, 1999 | 2 km NNE of Kar??yaka, Turkey | M5.2 | 86 km | 10 km |
| Sep 29, 1999 | 8 km NNW of Ta?köprü, Turkey | M5.2 | 136 km | 10 km |
| Aug 17, 1999 | 9 km SE of Akyaz?, Turkey | M5.1 | 36 km | 10 km |
| Nov 24, 2013 | 14 km WNW of Yeniça?a, Turkey | M5.1 | 78 km | 6 km |
| Nov 16, 1999 | 2 km S of Bolu, Turkey | M5.1 | 58 km | 10 km |
| Oct 15, 2016 | 117 km NNW of Ere?li, Turkey | M5.1 | 150 km | 6 km |
| Nov 7, 1999 | 8 km E of Akyaz?, Turkey | M5.0 | 28 km | 10 km |
| Aug 26, 2001 | 24 km N of Bolu, Turkey | M5.0 | 53 km | 8 km |
| Aug 17, 1999 | 2 km NW of Kullar, Turkey | M5.0 | 84 km | 10 km |
| Aug 17, 1999 | 9 km ESE of Köseköy, Turkey | M4.9 | 73 km | 10 km |
| Aug 17, 1999 | 11 km ESE of Akyaz?, Turkey | M4.9 | 30 km | 10 km |
| Feb 14, 2000 | 28 km SW of Devrek, Turkey | M4.9 | 70 km | 10 km |
| Aug 17, 1999 | 12 km SE of Karapürçek, Turkey | M4.8 | 43 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 2.5 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1999 | KOCAELI, TURKEY | Earthquake | 2.5 m | 17,118 | 84 km |
| 986 | MARMARA SEA | Earthquake | — | — | 148 km |
| 551 | LEVANTIAN SEA | Earthquake | — | — | 89 km |
| 478 | MARMARA SEA | Earthquake | — | — | 148 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 3.5 in | |
| February | 40°F (5°C) | 2.6 in | Coldest |
| March | 43°F (6°C) | 2.8 in | |
| April | 51°F (11°C) | 2.4 in | |
| May | 58°F (14°C) | 2.2 in | |
| June | 64°F (18°C) | 2.2 in | |
| July | 71°F (22°C) | 2.1 in | Warmest |
| August | 68°F (20°C) | 2.0 in | Driest |
| September | 63°F (17°C) | 2.1 in | |
| October | 56°F (13°C) | 3.2 in | |
| November | 49°F (9°C) | 3.3 in | |
| December | 42°F (6°C) | 4.2 in | Wettest |
Cumayeri has a seasonal temperature swing of 31°F / from 40°F in February to 71°F in July. Total annual precipitation is 32.5 inches, with December being the wettest month (4.2") and August the driest (2.0").