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Average Weather in Thérmo Greece

In Thérmo, the summers are hot, dry, and clear and the winters are long, very cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 35°F to 88°F and is rarely below 27°F or above 94°F.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec97%97%49%49%clearovercastprecipitation: 4.1 inprecipitation: 4.1 in0.2 in0.2 inmuggy: 7%muggy: 7%0%0%drydrybeach/pool score: 8.8beach/pool score: 8.80.00.0
Click on each chart for more information.

Based on the beach/pool score, the best time of year to visit Thérmo for hot-weather activities is from late June to late August.

Temperature

The hot season lasts for 3.0 months, from June 12 to September 12, with an average daily high temperature above 80°F. The hottest day of the year is July 30, with an average high of 88°F and low of 64°F.

The cool season lasts for 4.0 months, from November 23 to March 24, with an average daily high temperature below 57°F. The coldest day of the year is January 22, with an average low of 35°F and high of 49°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in ThérmoJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldvery coldcoldcoldcoolcomfortablewarmhotvery coldcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Berry Creek, California, United States (6,556 miles away) and Lebec, California, United States (6,778 miles) are the far-away foreign places with temperatures most similar to Thérmo (view comparison).

Clouds

In Thérmo, 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 Thérmo begins around May 29 and lasts for 3.8 months, ending around September 23. On July 20, 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 September 23 and lasts for 8.2 months, ending around May 29. On December 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 51% of the time, and clear, mostly clear, or partly cloudy 49% of the time.

Cloud Cover Categories

Cloud Cover Categories in ThérmoclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2097%Jul 2097%Dec 1249%Dec 1249%May 2973%May 2973%Sep 2374%Sep 2374%clearpartly cloudymostly cloudyovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 6.5 months, from October 4 to April 19, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 36% on December 6.

The drier season lasts 5.5 months, from April 19 to October 4. The smallest chance of a wet day is 3% on July 10.

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 35% on December 6.

Daily Chance of Precipitation

Daily Chance of Precipitation in ThérmowetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 636%Dec 636%Jul 103%Jul 103%Oct 419%Oct 419%Apr 1919%Apr 1919%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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. Thérmo experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.7 months, from August 18 to June 10, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 26, with an average total accumulation of 4.1 inches.

The rainless period of the year lasts for 2.3 months, from June 10 to August 18. The least rain falls around July 10, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Thérmo varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 28 minutes of daylight; the longest day is June 21, with 14 hours, 52 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:08 AM on June 13, and the latest sunrise is 1 hour, 47 minutes later at 7:55 AM on October 28. The earliest sunset is at 5:12 PM on December 7, and the latest sunset is 3 hours, 50 minutes later at 9:01 PM on June 28.

Daylight saving time (DST) is observed in Thérmo during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in ThérmoJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 136:08 AMJun 136:08 AM9:01 PMJun 289:01 PMJun 28Dec 75:12 PMDec 75:12 PM7:55 AMOct 287:55 AMOct 28Mar 26DSTMar 26DSTDSTOct 29DSTOct 29daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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.

The perceived humidity level in Thérmo, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 3% of 3% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in ThérmoJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 130%Dec 130%Aug 147%Aug 147%humidhumidcomfortablecomfortabledrydrymuggymuggy
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Thérmo experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.3 months, from October 30 to April 10, with average wind speeds of more than 7.2 miles per hour. The windiest day of the year is February 24, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 6.6 months, from April 10 to October 30. The calmest day of the year is August 7, with an average hourly wind speed of 5.9 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the west for 6.8 months, from March 10 to October 4, with a peak percentage of 59% on June 13. The wind is most often from the east for 5.2 months, from October 4 to March 10, with a peak percentage of 40% on January 1.

Wind Direction

Wind Direction in ThérmoEWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westeastsouthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Thérmo 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 3.2 months, from June 30 to October 4, with an average temperature above 74°F. The day of the year with the warmest water is August 14, with an average temperature of 78°F.

The time of year with cooler water lasts for 4.1 months, from December 24 to April 28, with an average temperature below 62°F. The day of the year with the coolest water is February 28, with an average temperature of 57°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Thérmo 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 time of year to visit Thérmo for general outdoor tourist activities is from mid May to early October, with a peak score in the third week of June.

Tourism Score

Tourism Score in Thérmobest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.18.10.50.58.18.17.47.4 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Thérmo for hot-weather activities is from late June to late August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in Thérmobest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.88.80.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Thérmo typically lasts for 8.6 months (261 days), from around March 15 to around December 1, rarely starting before February 13 or after April 8, and rarely ending before November 6 or after December 27.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Thérmogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1550%Mar 1550%Dec 150%Dec 190%Apr 890%Apr 890%Nov 690%Nov 610%Feb 1310%Feb 1310%Dec 2710%Dec 270%Jan 170%Jan 17Jul 26100%Jul 26100%very coldcoldcoolcomfortablewarmhot
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

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 Thérmo should appear around March 29, only rarely appearing before March 13 or after April 13.

Growing Degree Days

Growing Degree Days in ThérmoJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°F4,000°FMar 2984°FMar 2984°FJun 16900°FJun 16900°FJul 231,800°FJul 231,800°FDec 313,787°FDec 313,787°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 3.3 months, from May 10 to August 20, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is June 30, with an average of 7.9 kWh.

The darker period of the year lasts for 3.5 months, from November 1 to February 15, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 21, with an average of 1.9 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Thérmo are 38.574 deg latitude, 21.666 deg longitude, and 1,381 ft elevation.

The topography within 2 miles of Thérmo contains large variations in elevation, with a maximum elevation change of 2,080 feet and an average elevation above sea level of 1,380 feet. Within 10 miles contains large variations in elevation (6,194 feet). Within 50 miles also contains extreme variations in elevation (8,330 feet).

The area within 2 miles of Thérmo is covered by cropland (34%), trees (33%), shrubs (15%), and grassland (11%), within 10 miles by trees (42%) and cropland (18%), and within 50 miles by trees (30%) and water (28%).

Data Sources

This report illustrates the typical weather in Thérmo, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Thérmo.

For each station, the records are corrected for the elevation difference between that station and Thérmo 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 Thérmo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Thérmo and a given station.

The stations contributing to this reconstruction are: Araxos Airport (46%, 52 kilometers, southwest); Aktion Airport (26%, 87 kilometers, northwest); Nea Anchialos National Airport (17%, 121 kilometers, northeast); and Tanagra Airport (11%, 168 kilometers, east).

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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.