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Average Weather in September in Marsa Alam Egypt

In Marsa Alam, the month of September is characterized by gradually falling daily high temperatures, with daily highs decreasing by 4°F, from 97°F to 93°F over the course of the month, and rarely exceeding 99°F or dropping below 90°F.

Daily low temperatures decrease by 4°F, from 83°F to 79°F, rarely falling below 77°F or exceeding 86°F.

For reference, on August 5, the hottest day of the year, temperatures in Marsa Alam typically range from 85°F to 98°F, while on January 30, the coldest day of the year, they range from 61°F to 74°F.

Average High and Low Temperature in September

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 hourly average temperatures for the quarter of the year centered on September. The horizontal axis is the day, 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 September

Average Hourly Temperature in September in Marsa Alam12 AM4 AM8 AM12 PM4 PM8 PM12 AM18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugAugOctOctwarmwarmhothotswelteringswelteringcomfortablecomfortable
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

The month of September in Marsa Alam experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 8% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 6% on September 25.

The clearest day of the month is September 25, with clear, mostly clear, or partly cloudy conditions 94% of the time.

For reference, on December 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 26%, while on June 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 96%.

Cloud Cover in September

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

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during September in Marsa Alam is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.0 inches.

Average Monthly Rainfall in September

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

Over the course of September in Marsa Alam, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 42 minutes, implying an average daily decrease of 1 minute, 27 seconds, and weekly decrease of 10 minutes, 6 seconds.

The shortest day of the month is September 30, with 11 hours, 56 minutes of daylight and the longest day is September 1, with 12 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in September

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 of the month in Marsa Alam is 5:21 AM on September 1 and the latest sunrise is 11 minutes later at 5:32 AM on September 30.

The latest sunset is 5:59 PM on September 1 and the earliest sunset is 31 minutes earlier at 5:28 PM on September 30.

Daylight saving time is not observed in Marsa Alam during 2017.

For reference, on June 21, the longest day of the year, the Sun rises at 4:51 AM and sets 13 hours, 42 minutes later, at 6:33 PM, while on December 21, the shortest day of the year, it rises at 6:21 AM and sets 10 hours, 35 minutes later, at 4:55 PM.

Sunrise & Sunset with Twilight in September

The solar day over the course of September. 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 chance that a given day will be muggy in Marsa Alam is increasing during September, rising from 17% to 22% over the course of the month.

For reference, on October 16, the muggiest day of the year, there are muggy conditions 26% of the time, while on February 19, the leasy muggy day of the year, there are muggy conditions 1% of the time.

Humidity Comfort Levels in September

Humidity Comfort Levels in September in Marsa Alam0%10%20%30%40%50%60%70%80%90%100%18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugAugOctOctSep 117%Sep 117%Sep 3022%Sep 3022%Sep 1117%Sep 1117%Sep 2120%Sep 2120%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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 Marsa Alam is essentially constant during September, remaining within 0.3 miles per hour of 6.3 miles per hour throughout.

For reference, on June 9, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on October 25, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.

The highest daily average wind speed during September is 6.6 miles per hour on September 14.

Average Wind Speed in September

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Marsa Alam throughout September is predominantly from the calm, with a peak proportion of 89% on September 29.

Wind Direction in September

Wind Direction in September in Marsa Alam0%20%40%60%80%100%18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugAugOctOctwestwesteasteastnorthnorthsouthsouth
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

Marsa Alam 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 surface water temperature in Marsa Alam is gradually decreasing during September, falling by 2°F, from 84°F to 82°F, over the course of the month.

Average Water Temperature in September

The daily average water temperature (purple line), 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 in Marsa Alam is gradually decreasing during September, falling by 0.9 kWh, from 7.3 kWh to 6.5 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September

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 Marsa Alam are 25.063 deg latitude, 34.890 deg longitude, and 59 ft elevation.

The topography within 2 miles of Marsa Alam contains only modest variations in elevation, with a maximum elevation change of 397 feet and an average elevation above sea level of 72 feet. Within 10 miles contains only modest variations in elevation (1,306 feet). Within 50 miles contains very significant variations in elevation (4,902 feet).

The area within 2 miles of Marsa Alam is covered by bare soil (69%) and water (31%), within 10 miles by bare soil (53%) and water (47%), and within 50 miles by water (50%) and bare soil (49%).

Data Sources

This report illustrates the typical weather in Marsa Alam year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Marsa Alam is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Marsa Alam, according to the International Standard Atmosphere .

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.

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.