Average Weather in Gharyan Libya
In Gharyan, the summers are long, hot, arid, and clear and the winters are cold, windy, and mostly clear. Over the course of the year, the temperature typically varies from 35°F to 96°F and is rarely below 28°F or above 108°F.
Based on the beach/pool score, the best time of year to visit Gharyan for hot-weather activities is from mid June to late September.
The hot season lasts for 3.9 months, from May 27 to September 24, with an average daily high temperature above 89°F. The hottest day of the year is July 16, with an average high of 96°F and low of 64°F.
The cool season lasts for 3.3 months, from November 27 to March 6, with an average daily high temperature below 65°F. The coldest day of the year is January 19, with an average low of 35°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
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
In Gharyan, 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 Gharyan begins around June 11 and lasts for 3.2 months, ending around September 18. On July 19, 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 September 18 and lasts for 8.8 months, ending around June 11. On November 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 35% of the time, and clear, mostly clear, or partly cloudy 65% 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 Gharyan varies throughout the year.
The wetter season lasts 5.6 months, from October 4 to March 24, with a greater than 9% chance of a given day being a wet day. The chance of a wet day peaks at 18% on January 6.
The drier season lasts 6.4 months, from March 24 to October 4. The smallest chance of a wet day is 0% on July 8.
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 18% on December 21.
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. Gharyan experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 6.7 months, from September 20 to April 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 14, with an average total accumulation of 1.5 inches.
The rainless period of the year lasts for 5.3 months, from April 11 to September 20. The least rain falls around July 13, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Gharyan varies significantly over the course of the year. In 2019, the shortest day is December 22, with 10 hours, 3 minutes of daylight; the longest day is June 21, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:00 AM on June 12, and the latest sunrise is 2 hours, 9 minutes later at 8:09 AM on January 9. The earliest sunset is at 6:02 PM on December 4, and the latest sunset is 2 hours, 16 minutes later at 8:18 PM on June 30.
Daylight saving time (DST) is not observed in Gharyan during 2019.
Sunrise & Sunset with Twilight
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.
Gharyan experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.0 months, from July 4 to October 6, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The muggiest day of the year is August 26, with muggy conditions 11% of the time.
The least muggy day of the year is December 9, 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
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 Gharyan experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.0 months, from November 18 to June 19, with average wind speeds of more than 10.1 miles per hour. The windiest day of the year is May 15, with an average hourly wind speed of 11.1 miles per hour.
The calmer time of year lasts for 5.0 months, from June 19 to November 18. The calmest day of the year is August 12, with an average hourly wind speed of 9.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Gharyan varies throughout the year.
The wind is most often from the north for 1.8 months, from April 1 to May 25 and for 3.1 months, from June 25 to September 27, with a peak percentage of 43% on July 26. The wind is most often from the south for 1.2 months, from September 27 to November 3, with a peak percentage of 31% on October 7. The wind is most often from the west for 4.9 months, from November 3 to April 1, with a peak percentage of 53% on January 1.
Gharyan 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 July 12 to October 18, with an average temperature above 77°F. The day of the year with the warmest water is August 25, with an average temperature of 81°F.
The time of year with cooler water lasts for 4.2 months, from December 30 to May 6, with an average temperature below 65°F. The day of the year with the coolest water is March 3, with an average temperature of 60°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Gharyan 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 Gharyan for general outdoor tourist activities are from mid April to late June and from late August to early November, with a peak score in the first week of October.
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 Gharyan for hot-weather activities is from mid June to late September, with a peak score in the last 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.
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 Gharyan typically lasts for 8.8 months (269 days), from around March 16 to around December 9, rarely starting before February 14 or after April 8, and rarely ending before November 18 or after January 1.
Time Spent in Various Temperature Bands and the Growing Season
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
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 Gharyan should appear around February 11, only rarely appearing before January 29 or after February 28.
Growing Degree Days
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 3.5 months, from May 9 to August 25, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest day of the year is July 11, with an average of 8.3 kWh.
The darker period of the year lasts for 3.1 months, from November 2 to February 6, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is December 21, with an average of 3.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Gharyan are 32.172 deg latitude, 13.020 deg longitude, and 2,113 ft elevation.
The topography within 2 miles of Gharyan contains very significant variations in elevation, with a maximum elevation change of 1,191 feet and an average elevation above sea level of 2,055 feet. Within 10 miles contains very significant variations in elevation (2,218 feet). Within 50 miles also contains large variations in elevation (3,186 feet).
The area within 2 miles of Gharyan is covered by grassland (33%), cropland (25%), artificial surfaces (21%), and trees (15%), within 10 miles by grassland (37%) and cropland (30%), and within 50 miles by cropland (27%) and bare soil (18%).
This report illustrates the typical weather in Gharyan, 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 is only a single weather station, Tripoli International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Gharyan.
At a distance of 56 kilometers from Gharyan, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Gharyan according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.
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.