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 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 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
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
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 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
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
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
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 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.
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
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%).
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.
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.