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Climate and Average Weather Year Round in Sumbuya Sierra Leone

In Sumbuya, the wet season is warm and overcast, 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 70°F to 91°F and is rarely below 63°F or above 96°F.

Based on the beach/pool score, the best time of year to visit Sumbuya for hot-weather activities is from late November to mid February.

Climate in Sumbuya

hotwarmhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow64%64%22%22%overcastclearprecipitation: 18.7 inprecipitation: 18.7 in0.3 in0.3 inmuggy: 100%muggy: 100%74%74%beach/pool score: 7.6beach/pool score: 7.63.83.8
Sumbuya weather by month. Click on each chart for more information.

The hot season lasts for 2.6 months, from February 4 to April 23, with an average daily high temperature above 89°F. The hottest month of the year in Sumbuya is April, with an average high of 90°F and low of 76°F.

The cool season lasts for 3.5 months, from June 27 to October 10, with an average daily high temperature below 83°F. The coldest month of the year in Sumbuya is August, with an average low of 73°F and high of 81°F.

Average High and Low Temperature in Sumbuya

Average High and Low Temperature in SumbuyahotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 387°FJan 387°FMar 2191°FMar 2191°F70°F70°F75°F75°FApr 2389°FApr 2389°FJun 2783°FJun 2783°FOct 1083°FOct 1083°F76°F76°F74°F74°F74°F74°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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 88°F90°F91°F90°F87°F84°F82°F81°F82°F84°F85°F86°F
Temp. 78°F80°F82°F82°F81°F79°F77°F76°F77°F78°F79°F78°F
Low 70°F73°F75°F76°F76°F75°F73°F73°F73°F74°F74°F71°F

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 Sumbuya

Average Hourly Temperature in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcomfortablecomfortablecomfortablewarmwarmhothot
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.

San Félix, Panama (4,782 miles away) and Ban Nam Yuen, Thailand (7,534 miles) are the far-away foreign places with temperatures most similar to Sumbuya (view comparison).

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In Sumbuya, 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 Sumbuya begins around November 19 and lasts for 3.6 months, ending around March 8.

The clearest month of the year in Sumbuya is January, during which on average the sky is clear, mostly clear, or partly cloudy 63% of the time.

The cloudier part of the year begins around March 8 and lasts for 8.4 months, ending around November 19.

The cloudiest month of the year in Sumbuya is May, during which on average the sky is overcast or mostly cloudy 77% of the time.

Cloud Cover Categories in Sumbuya

Cloud Cover Categories in SumbuyaclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 1564%Jan 1564%May 1722%May 1722%Nov 1943%Nov 1943%Mar 843%Mar 843%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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 37%46%59%71%77%70%69%72%73%70%59%42%
Clearer 63%54%41%29%23%30%31%28%27%30%41%58%

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

The wetter season lasts 6.0 months, from April 27 to October 28, with a greater than 45% chance of a given day being a wet day. The month with the most wet days in Sumbuya is August, with an average of 26.5 days with at least 0.04 inches of precipitation.

The drier season lasts 6.0 months, from October 28 to April 27. The month with the fewest wet days in Sumbuya is January, with an average of 1.1 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 in Sumbuya is August, with an average of 26.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 87% on August 22.

Daily Chance of Precipitation in Sumbuya

Daily Chance of Precipitation in SumbuyawetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 2287%Aug 2287%Dec 303%Dec 303%Apr 2745%Apr 2745%Oct 2845%Oct 2845%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 1.1d2.6d4.1d10.5d16.9d20.6d23.4d26.5d23.5d17.9d7.7d1.9d

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. Sumbuya experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from February 6 to December 24, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Sumbuya is August, with an average rainfall of 18.6 inches.

The rainless period of the year lasts for 1.4 months, from December 24 to February 6. The month with the least rain in Sumbuya is January, with an average rainfall of 0.3 inches.

Average Monthly Rainfall in Sumbuya

Average Monthly Rainfall in SumbuyarainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in10 in10 in20 in20 in30 in30 in40 in40 inAug 2118.7 inAug 2118.7 inJan 130.3 inJan 130.3 inDec 240.5 inDec 240.5 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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.3″0.7″1.4″3.3″6.4″12.3″15.2″18.6″15.6″8.1″3.0″0.8″

The length of the day in Sumbuya does not vary substantially over the course of the year, staying within 34 minutes of 12 hours throughout. In 2024, the shortest day is December 21, with 11 hours, 41 minutes of daylight; the longest day is June 20, with 12 hours, 34 minutes of daylight.

Hours of Daylight and Twilight in Sumbuya

Hours of Daylight and Twilight in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2012 hr, 34 minJun 2012 hr, 34 minJun 2012 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 41 minDec 2111 hr, 41 minDec 21nightnightdayNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 11.7h11.9h12.1h12.3h12.5h12.6h12.5h12.4h12.2h11.9h11.8h11.7h

The earliest sunrise is at 6:29 AM on May 26, and the latest sunrise is 38 minutes later at 7:07 AM on February 1. The earliest sunset is at 6:25 PM on November 13, and the latest sunset is 44 minutes later at 7:09 PM on July 14.

Daylight saving time (DST) is not observed in Sumbuya during 2024.

Sunrise & Sunset with Twilight in Sumbuya

Sunrise & Sunset with Twilight in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMay 266:29 AMMay 266:29 AM7:09 PMJul 147:09 PMJul 14Nov 136:25 PMNov 136:25 PM7:07 AMFeb 17:07 AMFeb 1daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Sumbuya

Solar Elevation and Azimuth in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00001010101020202020303030304040404050505050606060607070708080000010101010202020203030303040404040505050506060607070805990NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

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.

Moon Rise, Set & Phases in Sumbuya

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.

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.

Sumbuya experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 11 months, from January 25 to December 22, during which time the comfort level is muggy, oppressive, or miserable at least 81% of the time.

The month with the fewest muggy days in Sumbuya is January, with 23.9 days that are muggy or worse.

Humidity Comfort Levels in Sumbuya

Humidity Comfort Levels in SumbuyamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 874%Jan 874%100%Aug 8100%Aug 8Dec 2281%Dec 2281%NowNowmiserablemiserableoppressiveoppressivemuggymuggycomfortablecomfortable
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 23.9d26.2d30.2d29.8d31.0d30.0d31.0d31.0d30.0d31.0d29.8d26.5d

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 Sumbuya experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.6 months, from June 9 to September 28, with average wind speeds of more than 4.5 miles per hour. The windiest month of the year in Sumbuya is August, with an average hourly wind speed of 5.7 miles per hour.

The calmer time of year lasts for 8.4 months, from September 28 to June 9. The calmest month of the year in Sumbuya is November, with an average hourly wind speed of 3.2 miles per hour.

Average Wind Speed in Sumbuya

Average Wind Speed in SumbuyawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mphAug 75.8 mphAug 75.8 mphNov 203.1 mphNov 203.1 mphJun 94.5 mphJun 94.5 mphSep 284.5 mphSep 284.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 3.84.04.24.14.04.75.55.74.93.93.23.4

The predominant average hourly wind direction in Sumbuya varies throughout the year.

The wind is most often from the west for 4.6 months, from January 1 to May 21 and for 1.4 months, from November 8 to December 19, with a peak percentage of 60% on April 4. The wind is most often from the south for 5.6 months, from May 21 to November 8, with a peak percentage of 68% on July 15. The wind is most often from the east for 1.7 weeks, from December 19 to December 31, with a peak percentage of 30% on December 26.

Wind Direction in Sumbuya

Wind Direction in SumbuyaWSWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
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).

Sumbuya 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 does not vary significantly over the course of the year, remaining within 2°F of 82°F throughout.

Average Water Temperature in Sumbuya

Average Water Temperature in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec78°F78°F80°F80°F82°F82°F84°F84°F86°F86°FMay 2083°FMay 2083°F80°FAug 2180°FAug 21Jul 2480°FJul 2480°FSep 1780°FSep 1780°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 82°F80°F80°F82°F83°F82°F81°F80°F80°F82°F83°F83°F

To characterize how pleasant the weather is in Sumbuya 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 Sumbuya for general outdoor tourist activities is from mid December to late January, with a peak score in the first week of January.

Tourism Score in Sumbuya

Tourism Score in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.65.62.62.63.63.6NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism 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 Sumbuya for hot-weather activities is from late November to mid February, with a peak score in the first week of January.

Beach/Pool Score in Sumbuya

Beach/Pool Score in Sumbuyabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.67.63.83.8NowNowtemperaturetemperature precipitationprecipitationbeach/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.

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 Sumbuya 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 in Sumbuya

Time Spent in Various Temperature Bands and the Growing Season in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec0%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 2100%Jul 2NowNowcomfortablewarmhotcoolsweltering
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 in Sumbuya

Growing Degree Days in SumbuyaJanFebMarAprMayJunJulAugSepOctNovDec0°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 3110,382°FDec 3110,382°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 2.4 months, from January 9 to March 22, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest month of the year in Sumbuya is February, with an average of 5.4 kWh.

The darker period of the year lasts for 1.9 months, from May 1 to June 28, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest month of the year in Sumbuya is May, with an average of 4.2 kWh.

Average Daily Incident Shortwave Solar Energy in Sumbuya

Average Daily Incident Shortwave Solar Energy in SumbuyabrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhFeb 115.4 kWhFeb 115.4 kWhMay 224.1 kWhMay 224.1 kWhMar 225.2 kWhMar 225.2 kWhJun 284.3 kWhJun 284.3 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 5.25.45.24.74.24.34.44.54.34.24.24.8

For the purposes of this report, the geographical coordinates of Sumbuya are 7.648 deg latitude, -11.961 deg longitude, and 128 ft elevation.

The topography within 2 miles of Sumbuya contains only modest variations in elevation, with a maximum elevation change of 154 feet and an average elevation above sea level of 100 feet. Within 10 miles contains only modest variations in elevation (902 feet). Within 50 miles also contains very significant variations in elevation (1,647 feet).

The area within 2 miles of Sumbuya is covered by cropland (37%), grassland (19%), shrubs (19%), and trees (19%), within 10 miles by cropland (37%) and trees (23%), and within 50 miles by cropland (26%) and trees (25%).

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

Sumbuya 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 Sumbuya, 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 Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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.

Please review our full terms contained on our Terms of Service page.