Winter Weather in Ribeirão das Neves BrazilDaily high temperatures increase by 4°F, from 76°F to 80°F, rarely falling below 70°F or exceeding 87°F. The lowest daily average high temperature is 76°F on June 29. Daily low temperatures are around 57°F, rarely falling below 50°F or exceeding 64°F. The lowest daily average low temperature is 55°F on July 7. For reference, on February 13, the hottest day of the year, temperatures in Ribeirão das Neves typically range from 67°F to 84°F, while on July 7, the coldest day of the year, they range from 55°F to 76°F. The figure below shows you a compact characterization of the hourly average winter 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. Francisco Sarabia, Mexico (4,183 miles away); Tshaneni, Swaziland (4,784 miles); and Kibakwe, Tanzania (5,449 miles) are the far-away foreign places with temperatures most similar to Ribeirão das Neves (view comparison). CloudsThe winter in Ribeirão das Neves experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 31% to 23%. The lowest chance of overcast or mostly cloudy conditions is 22% on August 17. The clearest day of the winter is August 17, with clear, mostly clear, or partly cloudy conditions 78% of the time. For reference, on December 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 81%, while on August 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Ribeirão das Neves, the chance of a wet day over the course of the winter is essentially constant, remaining around 6% throughout. For reference, the year's highest daily chance of a wet day is 70% on December 19, and its lowest chance is 2% on July 13. 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 winter in Ribeirão das Neves is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.9 inches or falling below -0.0 inches. The lowest average 31-day accumulation is 0.2 inches on July 7. SunOver the course of the winter in Ribeirão das Neves, the length of the day is increasing. From the start to the end of the season, the length of the day increases by 43 minutes, implying an average daily increase of 28 seconds, and weekly increase of 3 minutes, 16 seconds. The shortest day of the winter is June 20, with 10 hours, 56 minutes of daylight and the longest day is August 31, with 11 hours, 43 minutes of daylight. The latest sunrise of the winter in Ribeirão das Neves is 6:31 AM on July 6 and the earliest sunrise is 27 minutes earlier at 6:05 AM on August 31. The earliest sunset is 5:24 PM on June 4 and the latest sunset is 24 minutes later at 5:48 PM on August 31. Daylight saving time is not observed in Ribeirão das Neves during 2024. For reference, on December 21, the longest day of the year, the Sun rises at 5:14 AM and sets 13 hours, 20 minutes later, at 6:34 PM, while on June 20, the shortest day of the year, it rises at 6:29 AM and sets 10 hours, 56 minutes later, at 5:26 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 winter 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 Ribeirão das Neves is essentially constant during the winter, remaining within 1% of 1% throughout. The lowest chance of a muggy day during the winter is 0% on July 13. For reference, on December 21, the muggiest day of the year, there are muggy conditions 54% of the time, while on July 13, 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 Ribeirão das Neves is rapidly increasing during the winter, increasing from 7.1 miles per hour to 9.3 miles per hour over the course of the season. For reference, on September 12, the windiest day of the year, the daily average wind speed is 9.6 miles per hour, while on March 20, the calmest day of the year, the daily average wind speed is 6.9 miles per hour. The lowest daily average wind speed during the winter is 7.0 miles per hour on June 8. The hourly average wind direction in Ribeirão das Neves throughout the winter is predominantly from the east, with a peak proportion of 78% on August 26. 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 Ribeirão das Neves 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 Ribeirão das Neves are very rapidly decreasing during the winter, decreasing by 6,080°F, from 7,081°F to 1,001°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 Ribeirão das Neves is increasing during the winter, rising by 1.4 kWh, from 4.6 kWh to 6.0 kWh, over the course of the season. The lowest average daily incident shortwave solar energy during the winter is 4.6 kWh on June 16. TopographyFor the purposes of this report, the geographical coordinates of Ribeirão das Neves are -19.767 deg latitude, -44.087 deg longitude, and 2,638 ft elevation. The topography within 2 miles of Ribeirão das Neves contains significant variations in elevation, with a maximum elevation change of 604 feet and an average elevation above sea level of 2,754 feet. Within 10 miles contains significant variations in elevation (1,283 feet). Within 50 miles contains very significant variations in elevation (4,895 feet). The area within 2 miles of Ribeirão das Neves is covered by trees (30%), grassland (27%), shrubs (22%), and cropland (21%), within 10 miles by trees (31%) and shrubs (25%), and within 50 miles by trees (36%) and shrubs (30%). Data SourcesThis report illustrates the typical weather in Ribeirão das Neves, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Ribeirão das Neves. For each station, the records are corrected for the elevation difference between that station and Ribeirão das Neves 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 Ribeirão das Neves is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ribeirão das Neves and a given station. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Ribeirão das Neves and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll 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 © 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. |