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Average Weather in Grand-Bassam Côte d’Ivoire

In Grand-Bassam, the wet season is warm and mostly cloudy, the dry season is hot and partly cloudy, and it is oppressive year round. Over the course of the year, the temperature typically varies from 73°F to 88°F and is rarely below 70°F or above 90°F.

Based on the beach/pool score, the best time of year to visit Grand-Bassam for hot-weather activities is from mid July to early October.

Climate Summary

hotwarmhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow62%62%17%17%overcastclearprecipitation: 9.6 inprecipitation: 9.6 in0.3 in0.3 inmuggy: 100%muggy: 100%93%93%beach/pool score: 7.3beach/pool score: 7.33.13.1
Click on each chart for more information.

Temperature

The hot season lasts for 6.1 months, from November 16 to May 18, with an average daily high temperature above 87°F. The hottest day of the year is April 4, with an average high of 88°F and low of 78°F.

The cool season lasts for 2.4 months, from July 8 to September 21, with an average daily high temperature below 82°F. The coldest day of the year is August 13, with an average low of 73°F and high of 80°F.

Average High and Low Temperature

Average High and Low Temperature in Grand-BassamhothotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FAug 1380°FAug 1380°FApr 488°FApr 488°F73°F73°F78°F78°FNov 1687°FNov 1687°FMay 1887°FMay 1887°FJul 882°FJul 882°FSep 2182°FSep 2182°F77°F77°F77°F77°F75°F75°F75°F75°FNowNow
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 Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmhothotcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Punta de Burica, Panama (5,433 miles away); Cochin, India (5,484 miles); and Gebog, Indonesia (7,952 miles) are the far-away foreign places with temperatures most similar to Grand-Bassam (view comparison).

Clouds

In Grand-Bassam, 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 Grand-Bassam begins around June 21 and lasts for 7.6 months, ending around February 9. On December 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 38% of the time.

The cloudier part of the year begins around February 9 and lasts for 4.4 months, ending around June 21. On April 24, the cloudiest day of the year, the sky is overcast or mostly cloudy 83% of the time, and clear, mostly clear, or partly cloudy 17% of the time.

Cloud Cover Categories

Cloud Cover Categories in Grand-BassamclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 2162%Dec 2162%Apr 2417%Apr 2417%Jun 2140%Jun 2140%Feb 940%Feb 940%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Grand-Bassam varies very significantly throughout the year.

The wetter season lasts 7.7 months, from March 11 to November 1, with a greater than 43% chance of a given day being a wet day. The chance of a wet day peaks at 81% on June 3.

The drier season lasts 4.3 months, from November 1 to March 11. The smallest chance of a wet day is 5% on January 5.

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 81% on June 3.

Daily Chance of Precipitation

Daily Chance of Precipitation in Grand-BassamwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 381%Jun 381%Jan 55%Jan 55%Jan 15%Jan 15%Mar 1143%Mar 1143%Nov 143%Nov 143%NowNowrain
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. Grand-Bassam experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from January 31 to December 20, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 6, with an average total accumulation of 9.6 inches.

The rainless period of the year lasts for 1.4 months, from December 20 to January 31. The least rain falls around January 11, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Grand-BassamrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inJun 69.6 inJun 69.6 inJan 110.3 inJan 110.3 inOct 143.3 inOct 143.3 inAug 140.8 inAug 140.8 inDec 200.5 inDec 200.5 inNowNow
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 Grand-Bassam does not vary substantially over the course of the year, staying within 25 minutes of 12 hours throughout. In 2021, the shortest day is December 21, with 11 hours, 49 minutes of daylight; the longest day is June 21, with 12 hours, 26 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2012 hr, 26 minJun 2112 hr, 26 minJun 2112 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 49 minDec 2111 hr, 49 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 6:00 AM on October 23, and the latest sunrise is 31 minutes later at 6:31 AM on February 3. The earliest sunset is at 5:55 PM on November 10, and the latest sunset is 37 minutes later at 6:32 PM on July 17.

Daylight saving time (DST) is not observed in Grand-Bassam during 2021.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMOct 236:00 AMOct 236:00 AM6:32 PMJul 176:32 PMJul 17Nov 105:55 PMNov 105:55 PM6:31 AMFeb 36:31 AMFeb 3daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 Grand-Bassam, 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, staying within 4% of 96% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 193%Jan 193%100%May 20100%May 20NowNowmiserablemiserableoppressiveoppressivemuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Grand-Bassam experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.8 months, from May 28 to October 22, with average wind speeds of more than 8.3 miles per hour. The windiest day of the year is July 23, with an average hourly wind speed of 10.1 miles per hour.

The calmer time of year lasts for 7.2 months, from October 22 to May 28. The calmest day of the year is December 21, with an average hourly wind speed of 6.5 miles per hour.

Average Wind Speed

Average Wind Speed in Grand-BassamwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphJul 2310.1 mphJul 2310.1 mphDec 216.5 mphDec 216.5 mphMay 288.3 mphMay 288.3 mphOct 228.3 mphOct 228.3 mphNowNow
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 Grand-Bassam is from the south throughout the year.

Wind Direction

Wind Direction in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsouthwesteast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 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

Grand-Bassam 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 3.4 months, from February 26 to June 8, with an average temperature above 82°F. The day of the year with the warmest water is April 30, with an average temperature of 83°F.

The time of year with cooler water lasts for 2.2 months, from July 20 to September 26, with an average temperature below 77°F. The day of the year with the coolest water is August 22, with an average temperature of 75°F.

Average Water Temperature

Average Water Temperature in Grand-BassamwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°FApr 3083°FApr 3083°F75°FAug 2275°FAug 22Feb 2682°FFeb 2682°FJun 882°FJun 882°FJul 2077°FJul 2077°FSep 2677°FSep 2677°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Grand-Bassam 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 time of year to visit Grand-Bassam for general outdoor tourist activities is from late July to mid September, with a peak score in the third week of August.

Tourism Score

Tourism Score in Grand-Bassambest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.61.91.94.04.03.13.1NowNowprecipitationprecipitationcloudscloudstourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Grand-Bassam for hot-weather activities is from mid July to early October, with a peak score in the third week of August.

Beach/Pool Score

Beach/Pool Score in Grand-Bassambest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.37.33.13.16.46.45.65.6NowNowprecipitationprecipitationtemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 in Grand-Bassam 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.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3NowNowcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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.

Growing Degree Days

Growing Degree Days in Grand-BassamJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 490°FJan 490°FDec 3110,915°FDec 3110,915°FNowNow
The average growing degree days accumulated over the course of the year, 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 3.1 months, from July 21 to October 25, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest day of the year is August 19, with an average of 5.5 kWh.

The darker period of the year lasts for 3.0 months, from March 4 to June 4, with an average daily incident shortwave energy per square meter below 4.5 kWh. The darkest day of the year is April 29, with an average of 4.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Grand-BassambrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhAug 195.5 kWhAug 195.5 kWhApr 294.2 kWhApr 294.2 kWhOct 255.3 kWhOct 255.3 kWhMar 44.5 kWhMar 44.5 kWhNowNow
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 Grand-Bassam are 5.212 deg latitude, -3.739 deg longitude, and 23 ft elevation.

The topography within 2 miles of Grand-Bassam is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 13 feet. Within 10 miles is essentially flat (308 feet). Within 50 miles contains only modest variations in elevation (902 feet).

The area within 2 miles of Grand-Bassam is covered by water (35%), grassland (24%), and trees (19%), within 10 miles by water (55%) and trees (15%), and within 50 miles by water (55%) and cropland (15%).

Data Sources

This report illustrates the typical weather in Grand-Bassam, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Grand-Bassam.

For each station, the records are corrected for the elevation difference between that station and Grand-Bassam according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Grand-Bassam is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grand-Bassam and a given station.

The stations contributing to this reconstruction are: Port Bouet Airport (78%, 21 kilometers, west) and Adiake (22%, 50 kilometers, east).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.