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Average Weather in Aïn Sefra Algeria

In Aïn Sefra, the summers are sweltering and arid; the winters are long, cold, and dry; and it is mostly clear year round. Over the course of the year, the temperature typically varies from 37°F to 99°F and is rarely below 31°F or above 104°F.

The hot season lasts for 2.9 months, from June 11 to September 9, with an average daily high temperature above 90°F. The hottest day of the year is July 19, with an average high of 99°F and low of 75°F.

The cool season lasts for 3.9 months, from November 14 to March 10, with an average daily high temperature below 64°F. The coldest day of the year is January 12, with an average low of 37°F and high of 55°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 Aïn SefraJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMwarmhotswelteringcoldcoolchillycomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

Clouds

In Aïn Sefra, 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 Aïn Sefra begins around June 13 and lasts for 2.7 months, ending around September 5. On July 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 94% of the time, and overcast or mostly cloudy 6% of the time.

The cloudier part of the year begins around September 5 and lasts for 9.3 months, ending around June 13. On November 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

Cloud Cover Categories in Aïn SefraclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2094%Jul 2094%Nov 161%Nov 161%Jun 1377%Jun 1377%Sep 577%Sep 577%partly cloudyclearovercastmostly clearmostly cloudy
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 Aïn Sefra varies throughout the year.

The wetter season lasts 8.6 months, from August 27 to May 16, with a greater than 7% chance of a given day being a wet day. The chance of a wet day peaks at 12% on October 7.

The drier season lasts 3.4 months, from May 16 to August 27. The smallest chance of a wet day is 2% on July 18.

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 12% on October 7.

Daily Chance of Precipitation

Daily Chance of Precipitation in Aïn SefrawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Oct 712%Oct 712%Jul 182%Jul 182%Jan 16%Jan 16%Aug 277%Aug 277%May 167%May 167%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. Aïn Sefra experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.7 months, from September 14 to April 5, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around October 20, with an average total accumulation of 0.9 inches.

The rainless period of the year lasts for 5.3 months, from April 5 to September 14. The least rain falls around July 14, with an average total accumulation of 0.1 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 Aïn Sefra varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 60 minutes of daylight; the longest day is June 21, with 14 hours, 19 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Aïn SefraJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2014 hr, 19 minJun 2114 hr, 19 minJun 2112 hr, 8 minSep 2212 hr, 8 minSep 229 hr, 60 minDec 219 hr, 60 minDec 21nightnightday
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 5:53 AM on June 12, and the latest sunrise is 2 hours, 12 minutes later at 8:05 AM on January 7. The earliest sunset is at 5:55 PM on December 4, and the latest sunset is 2 hours, 19 minutes later at 8:14 PM on June 29.

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

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Aïn SefraJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:53 AMJun 125:53 AM8:14 PMJun 298:14 PMJun 29Dec 45:55 PMDec 45:55 PM8:05 AMJan 78:05 AMJan 7daynightnightnightnight
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.

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 Aïn Sefra, 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, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Aïn SefraJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 20%Feb 20%Aug 241%Aug 241%drydry
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 Aïn Sefra experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.9 months, from February 3 to July 1, with average wind speeds of more than 4.9 miles per hour. The windiest day of the year is April 12, with an average hourly wind speed of 5.6 miles per hour.

The calmer time of year lasts for 7.1 months, from July 1 to February 3. The calmest day of the year is October 16, with an average hourly wind speed of 4.2 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 Aïn Sefra varies throughout the year.

The wind is most often from the south for 3.1 months, from June 22 to September 26 and for 2.0 weeks, from October 9 to October 23, with a peak percentage of 38% on August 5. The wind is most often from the north for 1.9 weeks, from September 26 to October 9 and for 8.0 months, from October 23 to June 22, with a peak percentage of 33% on October 1.

Wind Direction

Wind Direction in Aïn SefraNSNSNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southnorthwesteast
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).

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.2 months, from April 14 to August 19, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest day of the year is June 14, with an average of 8.1 kWh.

The darker period of the year lasts for 3.2 months, from October 31 to February 5, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest day of the year is December 18, with an average of 3.3 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Aïn SefrabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJun 148.1 kWhJun 148.1 kWhDec 183.3 kWhDec 183.3 kWhApr 147.1 kWhApr 147.1 kWhAug 197.1 kWhAug 197.1 kWhOct 314.3 kWhOct 314.3 kWhFeb 54.3 kWhFeb 54.3 kWh
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 Aïn Sefra are 32.750 deg latitude, -0.583 deg longitude, and 3,655 ft elevation.

The topography within 2 miles of Aïn Sefra contains significant variations in elevation, with a maximum elevation change of 548 feet and an average elevation above sea level of 3,629 feet. Within 10 miles contains significant variations in elevation (3,786 feet). Within 50 miles also contains extreme variations in elevation (4,833 feet).

The area within 2 miles of Aïn Sefra is covered by bare soil (91%), within 10 miles by bare soil (61%) and sparse vegetation (33%), and within 50 miles by bare soil (81%) and sparse vegetation (18%).

Data Sources

This report illustrates the typical weather in Aïn Sefra, 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, Mecheria Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Aïn Sefra.

At a distance of 93 kilometers from Aïn Sefra, 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 Aïn Sefra 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.

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.