Average Weather in May at Parnaiba Aeroporto Brazil
Daily high temperatures are around 89°F, rarely falling below 85°F or exceeding 94°F.
Daily low temperatures are around 78°F, rarely falling below 76°F or exceeding 79°F. The highest daily average low temperature is 78°F on May 8.
For reference, on December 5, the hottest day of the year, temperatures at Parnaiba Aeroporto typically range from 80°F to 91°F, while on July 6, the coldest day of the year, they range from 77°F to 89°F.
Average High and Low Temperature in May
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
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
Nai Harn, Thailand (9,679 miles away); Singapore (10,069 miles); and Surabaya, Indonesia (10,554 miles) are the far-away foreign places with temperatures most similar to Parnaiba Aeroporto (view comparison).
The month of May at Parnaiba Aeroporto experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 79% to 59%.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 41% of the time.
For reference, on April 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 83%, while on August 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.
Cloud Cover Categories in May
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Parnaiba Aeroporto, the chance of a wet day over the course of May is very rapidly decreasing, starting the month at 64% and ending it at 32%.
For reference, the year's highest daily chance of a wet day is 81% on March 25, and its lowest chance is 1% on September 17.
Probability of Precipitation in May
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 at Parnaiba Aeroporto is very rapidly decreasing, starting the month at 7.0 inches, when it rarely exceeds 14.0 inches or falls below 1.4 inches, and ending the month at 2.5 inches, when it rarely exceeds 5.9 inches or falls below 0.3 inches.
Average Monthly Rainfall in May
Over the course of May at Parnaiba Aeroporto, the length of the day is essentially constant. The shortest day of the month is May 31, with 11 hours, 58 minutes of daylight and the longest day is May 1, with 12 hours, 1 minute of daylight.
Hours of Daylight and Twilight in May
The earliest sunrise of the month at Parnaiba Aeroporto is 5:43 AM on May 7 and the latest sunrise is 2 minutes, 12 seconds later at 5:45 AM on May 31.
The latest sunset is 5:44 PM on May 1 and the earliest sunset is 1 minute, 28 seconds earlier at 5:42 PM on May 18.
Daylight saving time is not observed at Parnaiba Aeroporto during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 5:36 AM and sets 12 hours, 18 minutes later, at 5:53 PM, while on June 21, the shortest day of the year, it rises at 5:50 AM and sets 11 hours, 57 minutes later, at 5:47 PM.
Sunrise & Sunset with Twilight in May
The figure below presents a compact representation of key lunar data for May 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in May
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 at Parnaiba Aeroporto is essentially constant during May, remaining around 100% throughout.
For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on July 29, the least muggy day of the year, there are muggy conditions 100% of the time.
Humidity Comfort Levels in May
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 at Parnaiba Aeroporto is increasing during May, increasing from 8.8 miles per hour to 10.2 miles per hour over the course of the month.
For reference, on October 11, the windiest day of the year, the daily average wind speed is 15.4 miles per hour, while on April 23, the calmest day of the year, the daily average wind speed is 8.6 miles per hour.
Average Wind Speed in May
The hourly average wind direction at Parnaiba Aeroporto throughout May is predominantly from the east, with a peak proportion of 93% on May 31.
Wind Direction in May
Parnaiba Aeroporto 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 at Parnaiba Aeroporto is essentially constant during May, remaining around 83°F throughout.
Average Water Temperature in May
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 at Parnaiba Aeroporto 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
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
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 at Parnaiba Aeroporto are very rapidly increasing during May, increasing by 965°F, from 9,799°F to 10,764°F, over the course of the month.
Growing Degree Days in May
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 at Parnaiba Aeroporto is gradually increasing during May, rising by 0.6 kWh, from 4.6 kWh to 5.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
This report illustrates the typical weather at Parnaiba Aeroporto, 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
Parnaiba Aeroporto has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.
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.
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.