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  5. May

Average Weather in May in Yanfolila Mali

Daily high temperatures decrease by 4°F, from 98°F to 93°F, rarely falling below 87°F or exceeding 103°F.

Daily low temperatures decrease by 3°F, from 78°F to 75°F, rarely falling below 71°F or exceeding 82°F.

For reference, on April 1, the hottest day of the year, temperatures in Yanfolila typically range from 79°F to 101°F, while on December 25, the coldest day of the year, they range from 64°F to 91°F.

Average High and Low Temperature in May

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 May. 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 May

Average Hourly Temperature in May in Yanfolila18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMAprJunwarmwarmhotswelteringhotcomfortable
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.

Sulya, India (5,629 miles away); Solāpur, India (5,606 miles); and Thanatpin, Myanmar (Burma) (6,928 miles) are the far-away foreign places with temperatures most similar to Yanfolila (view comparison).

Clouds

The month of May in Yanfolila experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 65% throughout the month. The highest chance of overcast or mostly cloudy conditions is 68% on May 4.

The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 37% of the time.

For reference, on August 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on January 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.

Cloud Cover Categories in May

Cloud Cover Categories in May in Yanfolila1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunJan 2565%Jan 2565%May 133%May 133%May 3137%May 3137%May 1133%May 1133%May 2134%May 2134%clearmostly 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. In Yanfolila, the chance of a wet day over the course of May is very rapidly increasing, starting the month at 34% and ending it at 57%.

For reference, the year's highest daily chance of a wet day is 90% on August 14, and its lowest chance is 0% on December 17.

Probability of Precipitation in May

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 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 May in Yanfolila is very rapidly increasing, starting the month at 2.0 inches, when it rarely exceeds 3.8 inches or falls below 0.6 inches, and ending the month at 4.2 inches, when it rarely exceeds 7.5 inches or falls below 1.6 inches.

Average Monthly Rainfall in May

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 May in Yanfolila, the length of the day is essentially constant. The shortest day of the month is May 1, with 12 hours, 31 minutes of daylight and the longest day is May 31, with 12 hours, 44 minutes of daylight.

Hours of Daylight and Twilight in May

Hours of Daylight and Twilight in May in Yanfolila1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAprJunnightnightdaydayMay 112 hr, 31 minMay 112 hr, 31 minMay 3112 hr, 44 minMay 3112 hr, 44 min
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 latest sunrise of the month in Yanfolila is 6:14 AM on May 1 and the earliest sunrise is 6 minutes earlier at 6:08 AM on May 30.

The earliest sunset is 6:45 PM on May 1 and the latest sunset is 7 minutes later at 6:52 PM on May 31.

Daylight saving time is not observed in Yanfolila during 2019.

For reference, on June 21, the longest day of the year, the Sun rises at 6:10 AM and sets 12 hours, 47 minutes later, at 6:57 PM, while on December 22, the shortest day of the year, it rises at 6:46 AM and sets 11 hours, 28 minutes later, at 6:15 PM.

Sunrise & Sunset with Twilight in May

The solar day over the course of May. 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 Yanfolila is rapidly increasing during May, rising from 81% to 96% over the course of the month.

For reference, on September 8, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 31, the least muggy day of the year, there are muggy conditions 1% of the time.

Humidity Comfort Levels in May

Humidity Comfort Levels in May in Yanfolila1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%AprJunMay 181%May 181%May 3196%May 3196%May 1189%May 1189%May 2194%May 2194%miserablemiserableoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortable
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 Yanfolila is gradually decreasing during May, decreasing from 7.2 miles per hour to 6.6 miles per hour over the course of the month.

For reference, on January 24, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on October 16, the calmest day of the year, the daily average wind speed is 4.6 miles per hour.

Average Wind Speed in May

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 Yanfolila throughout May is predominantly from the south, with a peak proportion of 52% on May 20.

Wind Direction in May

Wind Direction in May in Yanfolila1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%AprJunwestsoutheastnorth
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).

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 Yanfolila 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 May

Time Spent in Various Temperature Bands and the Growing Season in May in Yanfolila1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun100%May 16100%May 16comfortablewarmhotsweltering
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.

The average accumulated growing degree days in Yanfolila are very rapidly increasing during May, increasing by 986°F, from 3,762°F to 4,748°F, over the course of the month.

Growing Degree Days in May

The average growing degree days accumulated over the course of May, 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 Yanfolila is essentially constant during May, remaining within 0.2 kWh of 5.7 kWh throughout.

Average Daily Incident Shortwave Solar Energy in May

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 Yanfolila are 11.183 deg latitude, -8.150 deg longitude, and 1,234 ft elevation.

The topography within 2 miles of Yanfolila contains only modest variations in elevation, with a maximum elevation change of 174 feet and an average elevation above sea level of 1,223 feet. Within 10 miles also contains only modest variations in elevation (390 feet). Within 50 miles contains only modest variations in elevation (722 feet).

The area within 2 miles of Yanfolila is covered by cropland (42%), grassland (31%), and artificial surfaces (19%), within 10 miles by trees (51%) and cropland (22%), and within 50 miles by trees (42%) and grassland (22%).

Data Sources

This report illustrates the typical weather in Yanfolila year round, 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 Yanfolila.

For each station, the records are corrected for the elevation difference between that station and Yanfolila 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 Yanfolila is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Yanfolila and a given station.

The stations contributing to this reconstruction are: Bougouni Airport (74%, 76 kilometers, east) and Bamako–Sénou International Airport (26%, 152 kilometers, north).

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.

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.