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Average Weather in Anse Boileau Seychelles

The climate in Anse Boileau is warm, oppressive, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 76°F to 87°F and is rarely below 74°F or above 89°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 Anse Boileau12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecwarmhot
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 Anse Boileau, 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 Anse Boileau begins around July 22 and lasts for 4.7 months, ending around December 14. On October 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 49% of the time, and overcast or mostly cloudy 51% of the time.

The cloudier part of the year begins around December 14 and lasts for 7.3 months, ending around July 22. On January 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.

Cloud Cover

Cloud Cover in Anse Boileauclearercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 1173%Jan 1173%Oct 651%Oct 651%Jul 2262%Jul 2262%Dec 1462%Dec 1462%overcastmostly cloudypartly cloudymostly clearclear
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 Anse Boileau varies significantly throughout the year.

The wetter season lasts 5.0 months, from October 20 to March 19, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 59% on December 30.

The drier season lasts 7.0 months, from March 19 to October 20. The smallest chance of a wet day is 9% on July 27.

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 59% on December 30.

Daily Chance of Precipitation

Daily Chance of Precipitation in Anse Boileauwetwetdry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 3059%Dec 3059%Jul 279%Jul 279%Oct 2035%Oct 2035%Mar 1934%Mar 1934%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. Anse Boileau experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Anse Boileau. The most rain falls during the 31 days centered around January 5, with an average total accumulation of 7.5 inches.

The least rain falls around July 25, with an average total accumulation of 0.8 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 Anse Boileau does not vary substantially over the course of the year, staying within 23 minutes of 12 hours throughout. In 2017, the shortest day is June 21, with 11 hours, 51 minutes of daylight; the longest day is December 21, with 12 hours, 24 minutes of daylight.

Hours of Daylight and Twilight

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 5:52 AM on November 11, and the latest sunrise is 35 minutes later at 6:27 AM on July 20. The earliest sunset is at 6:09 PM on October 23, and the latest sunset is 31 minutes later at 6:40 PM on February 3.

Daylight saving time (DST) is not observed in Anse Boileau during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Anse Boileau2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecNov 115:52 AMNov 115:52 AM6:40 PMFeb 36:40 PMFeb 3Oct 236:09 PMOct 236:09 PM6:27 AMJul 206:27 AMJul 20daynightnight
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 Anse Boileau, 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 100% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Anse Boileau0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 15100%Aug 15100%100%Mar 12100%Mar 12miserablemiserableoppressiveoppressivemuggymuggyhumidhumid
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 Anse Boileau experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.8 months, from May 18 to October 13, with average wind speeds of more than 6.4 miles per hour. The windiest day of the year is August 19, with an average hourly wind speed of 9.2 miles per hour.

The calmer time of year lasts for 7.2 months, from October 13 to May 18. The calmest day of the year is April 7, with an average hourly wind speed of 3.8 miles per hour.

Average Wind Speed

Average Wind Speed in Anse Boileauwindy0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphJanFebMarAprMayJunJulAugSepOctNovDecAug 199.2 mphAug 199.2 mphApr 73.8 mphApr 73.8 mphMay 186.4 mphMay 186.4 mphOct 136.4 mphOct 136.4 mph
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 Anse Boileau varies throughout the year.

The wind is most often from the north for 2.6 months, from January 6 to March 26, with a peak percentage of 62% on February 13. The wind is most often from the west for 1.6 weeks, from March 26 to April 6 and for 1.5 months, from November 22 to January 6, with a peak percentage of 32% on April 4. The wind is most often from the south for 6.5 months, from May 6 to November 22, with a peak percentage of 92% on July 10.

Wind Direction

Wind Direction in Anse BoileauNWESW0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
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

Anse Boileau 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 2.4 months, from March 4 to May 16, with an average temperature above 84°F. The day of the year with the warmest water is April 14, with an average temperature of 85°F.

The time of year with cooler water lasts for 2.4 months, from June 23 to September 5, with an average temperature below 80°F. The day of the year with the coolest water is July 27, with an average temperature of 79°F.

Average Water Temperature

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 experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 1.4 months, from September 18 to October 31, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is October 7, with an average of 6.3 kWh.

The darker period of the year lasts for 2.5 months, from April 26 to July 11, with an average daily incident shortwave energy per square meter below 5.3 kWh. The darkest day of the year is June 6, with an average of 5.1 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Anse Boileaubrightdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhJanFebMarAprMayJunJulAugSepOctNovDecOct 76.3 kWhOct 76.3 kWhJun 65.1 kWhJun 65.1 kWhApr 265.3 kWhApr 265.3 kWhJul 115.3 kWhJul 115.3 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 Anse Boileau are -4.717 deg latitude, 55.483 deg longitude, and 161 ft elevation.

The topography within 2 miles of Anse Boileau contains large variations in elevation, with a maximum elevation change of 1,998 feet and an average elevation above sea level of 366 feet. Within 10 miles also contains large variations in elevation (2,989 feet). Within 50 miles also contains large variations in elevation (2,989 feet).

The area within 2 miles of Anse Boileau is covered by water (46%), trees (34%), and grassland (12%), within 10 miles by water (86%), and within 50 miles by water (99%).

Data Sources

This report illustrates the typical weather in Anse Boileau, 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, Seychelles International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Anse Boileau.

At a distance of 6 kilometers from Anse Boileau, 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 Anse Boileau 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.