Average Weather in Gebze Turkey

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In Gebze, the summers are warm, dry, and clear and the winters are long, chilly, and partly cloudy. Over the course of the year, the temperature typically varies from 36°F to 85°F and is rarely below 28°F or above 91°F.

The warm season lasts for 3.2 months, from June 9 to September 14, with an average daily high temperature above 77°F. The hottest day of the year is July 31, with an average high of 85°F and low of 65°F.

The cool season lasts for 3.8 months, from November 27 to March 20, with an average daily high temperature below 55°F. The coldest day of the year is January 22, with an average low of 36°F and high of 47°F.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

In Gebze, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Gebze begins around May 25 and lasts for 4.3 months, ending around October 3. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 97% of the time, and overcast or mostly cloudy 3% of the time.

The cloudier part of the year begins around October 3 and lasts for 7.7 months, ending around May 25. On December 25, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Gebze varies throughout the year.

The wetter season lasts 6.9 months, from October 3 to April 30, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 31% on December 22.

The drier season lasts 5.1 months, from April 30 to October 3. The smallest chance of a wet day is 8% on July 26.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 28% on December 14.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Gebze experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Gebze. The most rain falls during the 31 days centered around December 9, with an average total accumulation of 2.8 inches.

The least rain falls around August 4, with an average total accumulation of 0.7 inches.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Gebze experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 2.9 months, from December 13 to March 10, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 13, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 9.1 months, from March 10 to December 13. The least snow falls around July 25, with an average total liquid-equivalent accumulation of 0.0 inches.

The length of the day in Gebze varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 15 minutes of daylight; the longest day is June 21, with 15 hours, 6 minutes of daylight.

The earliest sunrise is at 5:30 AM on June 14, and the latest sunrise is 2 hours, 57 minutes later at 8:26 AM on January 5. The earliest sunset is at 5:34 PM on December 7, and the latest sunset is 3 hours, 3 minutes later at 8:37 PM on June 27.

Daylight saving time (DST) is not observed in Gebze during 2017.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Gebze experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.7 months, from June 19 to September 11, during which time the comfort level is muggy, oppressive, or miserable at least 11% of the time. The muggiest day of the year is August 5, with muggy conditions 44% of the time.

The least muggy day of the year is December 5, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Gebze experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.9 months, from October 1 to March 30, with average wind speeds of more than 4.2 miles per hour. The windiest day of the year is February 5, with an average hourly wind speed of 4.9 miles per hour.

The calmer time of year lasts for 6.1 months, from March 30 to October 1. The calmest day of the year is May 31, with an average hourly wind speed of 3.5 miles per hour.

The predominant average hourly wind direction in Gebze varies throughout the year.

The wind is most often from the north for 7.8 months, from January 29 to September 23; for 4.0 days, from September 29 to October 3; and for 1.0 months, from October 12 to November 12, with a peak percentage of 59% on July 27. The wind is most often from the east for 6.0 days, from September 23 to September 29 and for 1.3 weeks, from October 3 to October 12, with a peak percentage of 39% on September 23. The wind is most often from the south for 2.5 months, from November 12 to January 29, with a peak percentage of 34% on January 1.

Gebze is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 16 to October 1, with an average temperature above 69°F. The day of the year with the warmest water is August 9, with an average temperature of 75°F.

The time of year with cooler water lasts for 3.9 months, from December 18 to April 16, with an average temperature below 52°F. The day of the year with the coolest water is February 17, with an average temperature of 46°F.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from May 11 to August 22, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest day of the year is July 6, with an average of 7.9 kWh.

The darker period of the year lasts for 3.6 months, from October 29 to February 18, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest day of the year is December 23, with an average of 1.6 kWh.

For the purposes of this report, the geographical coordinates of Gebze are 40.803 deg latitude, 29.431 deg longitude, and 472 ft elevation.

The topography within 2 miles of Gebze contains very significant variations in elevation, with a maximum elevation change of 932 feet and an average elevation above sea level of 512 feet. Within 10 miles also contains very significant variations in elevation (1,414 feet). Within 50 miles contains very significant variations in elevation (7,234 feet).

The area within 2 miles of Gebze is covered by artificial surfaces (78%) and grassland (12%), within 10 miles by water (33%) and cropland (21%), and within 50 miles by water (37%) and trees (32%).

This report illustrates the typical weather in Gebze, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Gebze.

For each station, the records are corrected for the elevation difference between that station and Gebze according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Gebze is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Gebze and a given station.

The stations contributing to this reconstruction are: Sabiha Gökçen International Airport (81%, 15 kilometers, northwest); Cengiz Topel Naval Air Station (12%, 56 kilometers, east); and Bursa (8%, 76 kilometers, southwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.