Climate and Average Weather Year Round at Chlef International Airport Algeria

At Chlef International Airport, the summers are short, sweltering, arid, and mostly clear and the winters are long, cold, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 44°F to 99°F and is rarely below 37°F or above 107°F.

Based on the beach/pool score, the best time of year to visit Chlef International Airport for hot-weather activities is from early June to late September.

The hot season lasts for 2.9 months, from June 15 to September 10, with an average daily high temperature above 91°F. The hottest month of the year at Chlef International Airport is July, with an average high of 98°F and low of 73°F.

The cool season lasts for 3.9 months, from November 17 to March 14, with an average daily high temperature below 67°F. The coldest month of the year at Chlef International Airport is January, with an average low of 44°F and high of 60°F.

At Chlef International Airport, 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 at Chlef International Airport begins around June 13 and lasts for 2.6 months, ending around September 1.

The clearest month of the year at Chlef International Airport is July, during which on average the sky is clear, mostly clear, or partly cloudy 90% of the time.

The cloudier part of the year begins around September 1 and lasts for 9.4 months, ending around June 13.

The cloudiest month of the year at Chlef International Airport is October, during which on average the sky is overcast or mostly cloudy 43% of the time.

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

The wetter season lasts 8.0 months, from September 22 to May 20, with a greater than 12% chance of a given day being a wet day. The month with the most wet days at Chlef International Airport is February, with an average of 6.3 days with at least 0.04 inches of precipitation.

The drier season lasts 4.0 months, from May 20 to September 22. The month with the fewest wet days at Chlef International Airport is July, with an average of 0.4 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone at Chlef International Airport is February, with an average of 6.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 23% on November 19.

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. Chlef International Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.8 months, from September 8 to June 2, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Chlef International Airport is February, with an average rainfall of 1.9 inches.

The rainless period of the year lasts for 3.2 months, from June 2 to September 8. The month with the least rain at Chlef International Airport is July, with an average rainfall of 0.1 inches.

The length of the day at Chlef International Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 42 minutes of daylight; the longest day is June 20, with 14 hours, 38 minutes of daylight.

The earliest sunrise is at 5:36 AM on June 12, and the latest sunrise is 2 hours, 30 minutes later at 8:06 AM on January 7. The earliest sunset is at 5:39 PM on December 5, and the latest sunset is 2 hours, 36 minutes later at 8:16 PM on June 28.

Daylight saving time (DST) is not observed at Chlef International Airport during 2024.

The figure below presents a compact representation of key lunar data for 2024. 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.

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.

Chlef International Airport experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 18 to October 4, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The month with the most muggy days at Chlef International Airport is August, with 6.1 days that are muggy or worse.

The month with the fewest muggy days at Chlef International Airport is January, with 0.0 days that are muggy or worse.

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 at Chlef International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.4 months, from November 4 to May 17, with average wind speeds of more than 8.6 miles per hour. The windiest month of the year at Chlef International Airport is February, with an average hourly wind speed of 9.4 miles per hour.

The calmer time of year lasts for 5.6 months, from May 17 to November 4. The calmest month of the year at Chlef International Airport is August, with an average hourly wind speed of 7.8 miles per hour.

The predominant average hourly wind direction at Chlef International Airport varies throughout the year.

The wind is most often from the east for 3.7 months, from June 3 to September 25, with a peak percentage of 34% on July 18. The wind is most often from the west for 8.3 months, from September 25 to June 3, with a peak percentage of 38% on January 1.

Chlef International Airport 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 2.6 months, from July 11 to September 28, with an average temperature above 73°F. The month of the year at Chlef International Airport with the warmest water is August, with an average temperature of 76°F.

The time of year with cooler water lasts for 4.8 months, from December 7 to April 30, with an average temperature below 62°F. The month of the year at Chlef International Airport with the coolest water is February, with an average temperature of 59°F.

To characterize how pleasant the weather is at Chlef International Airport 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 Chlef International Airport for general outdoor tourist activities are from late March to mid June and from mid September to early November, with a peak score in the third 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 Chlef International Airport for hot-weather activities is from early June to late September, with a peak score in the last week of June.

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.

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).

Temperatures at Chlef International Airport 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.

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.

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 3.4 months, from May 6 to August 18, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest month of the year at Chlef International Airport is June, with an average of 7.8 kWh.

The darker period of the year lasts for 3.4 months, from October 30 to February 10, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest month of the year at Chlef International Airport is December, with an average of 2.5 kWh.

For the purposes of this report, the geographical coordinates of Chlef International Airport are 36.213 deg latitude, 1.332 deg longitude, and 463 ft elevation.

The topography within 2 miles of Chlef International Airport contains very significant variations in elevation, with a maximum elevation change of 1,024 feet and an average elevation above sea level of 546 feet. Within 10 miles also contains very significant variations in elevation (1,952 feet). Within 50 miles contains very significant variations in elevation (6,444 feet).

The area within 2 miles of Chlef International Airport is covered by cropland (90%), within 10 miles by cropland (77%), and within 50 miles by cropland (37%) and water (29%).