Summer Weather in Boa Esperança BrazilDaily high temperatures are around 81°F, rarely falling below 75°F or exceeding 87°F. Daily low temperatures are around 66°F, rarely falling below 61°F or exceeding 69°F. The highest daily average low temperature is 66°F on January 14. For reference, on October 16, the hottest day of the year, temperatures in Boa Esperança typically range from 63°F to 85°F, while on July 20, the coldest day of the year, they range from 53°F to 76°F. The figure below shows you a compact characterization of the hourly average summer temperatures. 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. Atla, Mexico (4,562 miles away); Lilongwe, Malawi (5,207 miles); and Chimala, Tanzania (5,338 miles) are the far-away foreign places with temperatures most similar to Boa Esperança (view comparison). CloudsThe summer in Boa Esperança experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 74% throughout the season. The highest chance of overcast or mostly cloudy conditions is 78% on January 15. The clearest day of the summer is February 28, with clear, mostly clear, or partly cloudy conditions 30% of the time. For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 78%, while on August 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Boa Esperança, the chance of a wet day over the course of the summer is very rapidly decreasing, starting the season at 64% and ending it at 53%. For reference, the year's highest daily chance of a wet day is 71% on December 20, and its lowest chance is 5% on July 28. RainfallTo show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day rainfall during the summer in Boa Esperança is rapidly decreasing, starting the season at 7.4 inches, when it rarely exceeds 10.7 inches or falls below 4.5 inches, and ending the season at 5.9 inches, when it rarely exceeds 9.8 inches or falls below 2.3 inches. The highest average 31-day accumulation is 9.5 inches on January 2. SunOver the course of the summer in Boa Esperança, the length of the day is decreasing. From the start to the end of the season, the length of the day decreases by 48 minutes, implying an average daily decrease of 33 seconds, and weekly decrease of 3 minutes, 49 seconds. The shortest day of the summer is February 28, with 12 hours, 31 minutes of daylight and the longest day is December 21, with 13 hours, 25 minutes of daylight. The earliest sunrise of the summer in Boa Esperança is 5:11 AM on December 1 and the latest sunrise is 47 minutes later at 5:59 AM on February 28. The latest sunset is 6:49 PM on January 14 and the earliest sunset is 20 minutes earlier at 6:30 PM on February 28. Daylight saving time is not observed in Boa Esperança during 2024. For reference, on December 21, the longest day of the year, the Sun rises at 5:18 AM and sets 13 hours, 25 minutes later, at 6:43 PM, while on June 20, the shortest day of the year, it rises at 6:38 AM and sets 10 hours, 51 minutes later, at 5:29 PM. 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. MoonThe figure below presents a compact representation of key lunar data for the summer of 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. 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. HumidityWe 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 Boa Esperança is rapidly increasing during the summer, rising from 53% to 71% over the course of the season. The highest chance of a muggy day during the summer is 75% on February 2. For reference, on February 2, the muggiest day of the year, there are muggy conditions 75% of the time, while on July 12, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Boa Esperança is decreasing during the summer, decreasing from 7.8 miles per hour to 6.5 miles per hour over the course of the season. For reference, on September 18, the windiest day of the year, the daily average wind speed is 8.4 miles per hour, while on April 8, the calmest day of the year, the daily average wind speed is 6.3 miles per hour. The wind direction in Boa Esperança during the summer is predominantly out of the north from December 1 to February 25 and the east from February 25 to February 28. Growing SeasonDefinitions 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 Boa Esperança 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. 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 Boa Esperança are very rapidly increasing during the summer, increasing by 2,041°F, from 2,974°F to 5,015°F, over the course of the season. Solar EnergyThis 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 Boa Esperança is essentially constant during the summer, remaining within 0.2 kWh of 5.9 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Boa Esperança are -21.090 deg latitude, -45.566 deg longitude, and 2,559 ft elevation. The topography within 2 miles of Boa Esperança contains only modest variations in elevation, with a maximum elevation change of 407 feet and an average elevation above sea level of 2,631 feet. Within 10 miles contains only modest variations in elevation (1,808 feet). Within 50 miles contains very significant variations in elevation (2,379 feet). The area within 2 miles of Boa Esperança is covered by cropland (26%), shrubs (22%), grassland (18%), and water (18%), within 10 miles by cropland (39%) and trees (20%), and within 50 miles by cropland (33%) and trees (23%). Data SourcesThis report illustrates the typical weather in Boa Esperança, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Boa Esperança 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 Boa Esperança, 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. DisclaimerThe 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. |