Average Weather in Ialysós Greece
In Ialysós, the summers are warm, muggy, arid, and clear; the winters are long, cool, wet, and partly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 50°F to 86°F and is rarely below 43°F or above 90°F.
Based on the beach/pool score, the best time of year to visit Ialysós for hot-weather activities is from mid June to late September.
The hot season lasts for 3.3 months, from June 13 to September 22, with an average daily high temperature above 81°F. The hottest day of the year is August 7, with an average high of 86°F and low of 76°F.
The cool season lasts for 3.8 months, from December 3 to March 29, with an average daily high temperature below 64°F. The coldest day of the year is February 7, with an average low of 50°F and high of 58°F.
Average High and Low Temperature
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.
Average Hourly Temperature
In Ialysós, 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 Ialysós begins around May 24 and lasts for 4.4 months, ending around October 5. On July 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 100% of the time, and overcast or mostly cloudy 0% of the time.
The cloudier part of the year begins around October 5 and lasts for 7.6 months, ending around May 24. On January 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 39% of the time, and clear, mostly clear, or partly cloudy 61% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Ialysós varies significantly throughout the year.
The wetter season lasts 5.1 months, from November 1 to April 4, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 37% on February 4.
The drier season lasts 6.9 months, from April 4 to November 1. The smallest chance of a wet day is 0% on July 12.
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 37% on February 4.
Daily Chance of Precipitation
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. Ialysós experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.0 months, from September 19 to May 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 1, with an average total accumulation of 5.1 inches.
The rainless period of the year lasts for 4.0 months, from May 19 to September 19. The least rain falls around July 24, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Ialysós varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 41 minutes of daylight; the longest day is June 21, with 14 hours, 39 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:48 AM on June 13, and the latest sunrise is 1 hour, 40 minutes later at 7:28 AM on October 30. The earliest sunset is at 4:51 PM on December 5, and the latest sunset is 3 hours, 38 minutes later at 8:29 PM on June 28.
Daylight saving time (DST) is observed in Ialysós during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 2021. 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.
Moon Rise, Set & Phases
Ialysós experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.5 months, from June 2 to October 19, during which time the comfort level is muggy, oppressive, or miserable at least 19% of the time. The muggiest day of the year is August 12, with muggy conditions 78% of the time.
The least muggy day of the year is December 24, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Ialysós experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 4.4 months, from November 27 to April 7, with average wind speeds of more than 11.6 miles per hour. The windiest day of the year is February 11, with an average hourly wind speed of 13.5 miles per hour.
The calmer time of year lasts for 7.6 months, from April 7 to November 27. The calmest day of the year is May 24, with an average hourly wind speed of 9.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Ialysós varies throughout the year.
The wind is most often from the west for 7.8 months, from March 12 to November 5, with a peak percentage of 73% on August 21. The wind is most often from the north for 1.1 months, from November 5 to December 7 and for 2.4 months, from December 31 to March 12, with a peak percentage of 35% on November 10. The wind is most often from the south for 3.4 weeks, from December 7 to December 31, with a peak percentage of 34% on December 21.
Ialysós 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 13 to October 3, with an average temperature above 76°F. The day of the year with the warmest water is August 19, with an average temperature of 80°F.
The time of year with cooler water lasts for 4.5 months, from December 22 to May 4, with an average temperature below 65°F. The day of the year with the coolest water is March 4, with an average temperature of 62°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Ialysós 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 Ialysós for general outdoor tourist activities are from early May to early July and from early 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 Ialysós for hot-weather activities is from mid June to late September, with a peak score in the first week of July.
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.
Temperatures in Ialysós are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
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 3.5 months, from May 8 to August 24, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 29, with an average of 8.5 kWh.
The darker period of the year lasts for 3.4 months, from November 3 to February 14, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is December 21, with an average of 2.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Ialysós are 36.414 deg latitude, 28.155 deg longitude, and 52 ft elevation.
The topography within 2 miles of Ialysós contains very significant variations in elevation, with a maximum elevation change of 869 feet and an average elevation above sea level of 114 feet. Within 10 miles also contains very significant variations in elevation (1,555 feet). Within 50 miles contains very significant variations in elevation (4,160 feet).
The area within 2 miles of Ialysós is covered by water (40%), cropland (22%), and sparse vegetation (10%), within 10 miles by water (70%), and within 50 miles by water (77%) and trees (11%).
This report illustrates the typical weather in Ialysós, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Ialysós.
For each station, the records are corrected for the elevation difference between that station and Ialysós 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 Ialysós is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ialysós and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .