Climate and Average Weather Year Round in Dalyan Turkey

In Dalyan, the summers are hot, arid, and clear and the winters are long, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 41°F to 93°F and is rarely below 34°F or above 99°F.

Based on the beach/pool score, the best time of year to visit Dalyan for hot-weather activities is from early June to mid September.

The hot season lasts for 3.2 months, from June 12 to September 19, with an average daily high temperature above 86°F. The hottest month of the year in Dalyan is August, with an average high of 92°F and low of 71°F.

The cool season lasts for 4.0 months, from November 27 to March 25, with an average daily high temperature below 65°F. The coldest month of the year in Dalyan is January, with an average low of 42°F and high of 58°F.

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

The clearer part of the year in Dalyan begins around May 19 and lasts for 4.6 months, ending around October 7.

The clearest month of the year in Dalyan is July, during which on average the sky is clear, mostly clear, or partly cloudy 100% of the time.

The cloudier part of the year begins around October 7 and lasts for 7.4 months, ending around May 19.

The cloudiest month of the year in Dalyan is December, during which on average the sky is overcast or mostly cloudy 45% 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 Dalyan varies significantly throughout the year.

The wetter season lasts 5.6 months, from October 29 to April 16, with a greater than 19% chance of a given day being a wet day. The month with the most wet days in Dalyan is January, with an average of 10.7 days with at least 0.04 inches of precipitation.

The drier season lasts 6.4 months, from April 16 to October 29. The month with the fewest wet days in Dalyan is August, with an average of 0.5 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Dalyan is January, with an average of 10.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on February 4.

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. Dalyan experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.6 months, from September 15 to June 3, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Dalyan is December, with an average rainfall of 5.6 inches.

The rainless period of the year lasts for 3.4 months, from June 3 to September 15. The month with the least rain in Dalyan is July, with an average rainfall of 0.1 inches.

The length of the day in Dalyan varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 38 minutes of daylight; the longest day is June 20, with 14 hours, 41 minutes of daylight.

The earliest sunrise is at 5:45 AM on June 13, and the latest sunrise is 2 hours, 33 minutes later at 8:18 AM on January 6. The earliest sunset is at 5:48 PM on December 6, and the latest sunset is 2 hours, 40 minutes later at 8:28 PM on June 28.

Daylight saving time (DST) is not observed in Dalyan during 2024.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

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.

Dalyan experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.8 months, from June 22 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 7% of the time. The month with the most muggy days in Dalyan is August, with 8.1 days that are muggy or worse.

The least muggy day of the year is February 23, 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 Dalyan experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.5 months, from November 24 to April 7, with average wind speeds of more than 7.9 miles per hour. The windiest month of the year in Dalyan is February, with an average hourly wind speed of 9.0 miles per hour.

The calmer time of year lasts for 7.5 months, from April 7 to November 24. The calmest month of the year in Dalyan is May, with an average hourly wind speed of 6.7 miles per hour.

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

The wind is most often from the north for 10 months, from January 13 to November 15, with a peak percentage of 52% on June 30. The wind is most often from the south for 1.9 months, from November 15 to January 13, with a peak percentage of 36% on January 1.

Dalyan 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.7 months, from July 11 to October 3, with an average temperature above 77°F. The month of the year in Dalyan with the warmest water is August, with an average temperature of 80°F.

The time of year with cooler water lasts for 4.4 months, from December 23 to May 3, with an average temperature below 66°F. The month of the year in Dalyan with the coolest water is March, with an average temperature of 62°F.

To characterize how pleasant the weather is in Dalyan throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Dalyan for general outdoor tourist activities are from late April to late June and from mid September to late October, with a peak score in the last week of May.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Dalyan for hot-weather activities is from early June to mid September, with a peak score in the first week of July.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Dalyan typically lasts for 11 months (348 days), from around January 26 to around January 8, rarely starting after March 2, or ending before December 12.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Dalyan should appear around February 1, only rarely appearing before January 23 or after February 17.

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 10 to August 23, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest month of the year in Dalyan is July, with an average of 8.3 kWh.

The darker period of the year lasts for 3.4 months, from November 3 to February 15, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year in Dalyan is December, with an average of 2.3 kWh.

For the purposes of this report, the geographical coordinates of Dalyan are 36.834 deg latitude, 28.645 deg longitude, and 10 ft elevation.

The topography within 2 miles of Dalyan contains very significant variations in elevation, with a maximum elevation change of 1,490 feet and an average elevation above sea level of 117 feet. Within 10 miles contains very significant variations in elevation (3,048 feet). Within 50 miles contains large variations in elevation (8,163 feet).

The area within 2 miles of Dalyan is covered by cropland (52%), trees (23%), and herbaceous vegetation (15%), within 10 miles by trees (37%) and water (25%), and within 50 miles by water (37%) and trees (36%).