Climate and Average Weather Year Round in Passagem Franca BrazilIn Passagem Franca, the wet season is oppressive and overcast, the dry season is humid and partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 72°F to 96°F and is rarely below 69°F or above 100°F. Based on the beach/pool score, the best time of year to visit Passagem Franca for hot-weather activities is from mid June to early September. Average Temperature in Passagem FrancaThe hot season lasts for 2.4 months, from August 15 to October 27, with an average daily high temperature above 94°F. The hottest month of the year in Passagem Franca is October, with an average high of 95°F and low of 76°F. The cool season lasts for 4.1 months, from December 22 to April 25, with an average daily high temperature below 89°F. The coldest month of the year in Passagem Franca is March, with an average low of 73°F and high of 87°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. Telica, Nicaragua (3,231 miles away); Ho, Ghana (3,180 miles); and Tungol, Philippines (11,660 miles) are the far-away foreign places with temperatures most similar to Passagem Franca (view comparison). CloudsIn Passagem Franca, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year. The clearer part of the year in Passagem Franca begins around May 30 and lasts for 4.4 months, ending around October 10. The clearest month of the year in Passagem Franca is July, during which on average the sky is clear, mostly clear, or partly cloudy 69% of the time. The cloudier part of the year begins around October 10 and lasts for 7.6 months, ending around May 30. The cloudiest month of the year in Passagem Franca is March, during which on average the sky is overcast or mostly cloudy 83% of the time.
PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Passagem Franca varies very significantly throughout the year. The wetter season lasts 5.0 months, from November 27 to April 29, with a greater than 35% chance of a given day being a wet day. The month with the most wet days in Passagem Franca is March, with an average of 20.9 days with at least 0.04 inches of precipitation. The drier season lasts 7.0 months, from April 29 to November 27. The month with the fewest wet days in Passagem Franca is July, with an average of 0.6 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 Passagem Franca is March, with an average of 20.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 69% on March 16.
RainfallTo 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. Passagem Franca experiences extreme seasonal variation in monthly rainfall. The rainy period of the year lasts for 8.9 months, from September 13 to June 10, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Passagem Franca is March, with an average rainfall of 7.1 inches. The rainless period of the year lasts for 3.1 months, from June 10 to September 13. The month with the least rain in Passagem Franca is August, with an average rainfall of 0.1 inches.
SunThe length of the day in Passagem Franca does not vary substantially over the course of the year, staying within 29 minutes of 12 hours throughout. In 2024, the shortest day is June 20, with 11 hours, 46 minutes of daylight; the longest day is December 21, with 12 hours, 29 minutes of daylight.
The earliest sunrise is at 5:27 AM on November 12, and the latest sunrise is 40 minutes later at 6:07 AM on July 17. The earliest sunset is at 5:46 PM on May 22, and the latest sunset is 34 minutes later at 6:19 PM on January 31. Daylight saving time (DST) is not observed in Passagem Franca during 2024. 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 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. 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. Passagem Franca experiences extreme seasonal variation in the perceived humidity. The muggier period of the year lasts for 9.6 months, from September 21 to July 9, during which time the comfort level is muggy, oppressive, or miserable at least 43% of the time. The month with the most muggy days in Passagem Franca is March, with 31.0 days that are muggy or worse. The month with the fewest muggy days in Passagem Franca is August, with 7.9 days that are muggy or worse.
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 Passagem Franca experiences mild seasonal variation over the course of the year. The windier part of the year lasts for 4.8 months, from June 3 to October 30, with average wind speeds of more than 3.5 miles per hour. The windiest month of the year in Passagem Franca is August, with an average hourly wind speed of 4.5 miles per hour. The calmer time of year lasts for 7.1 months, from October 30 to June 3. The calmest month of the year in Passagem Franca is March, with an average hourly wind speed of 2.5 miles per hour.
The predominant average hourly wind direction in Passagem Franca varies throughout the year. The wind is most often from the north for 2.9 months, from January 2 to March 30, with a peak percentage of 46% on March 12. The wind is most often from the east for 9.1 months, from March 30 to January 2, with a peak percentage of 41% on January 1. Best Time of Year to VisitTo characterize how pleasant the weather is in Passagem Franca 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 Passagem Franca for general outdoor tourist activities is from mid June to late August, with a peak score in the last week of July. Tourism Score in Passagem FrancaThe 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 Passagem Franca for hot-weather activities is from mid June to early September, with a peak score in the last week of July. Beach/Pool Score in Passagem FrancaMethodologyFor 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. 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 Passagem Franca 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. 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 experiences some seasonal variation over the course of the year. The brighter period of the year lasts for 2.5 months, from August 16 to October 30, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest month of the year in Passagem Franca is September, with an average of 7.0 kWh. The darker period of the year lasts for 4.5 months, from December 30 to May 14, with an average daily incident shortwave energy per square meter below 5.2 kWh. The darkest month of the year in Passagem Franca is April, with an average of 4.8 kWh.
TopographyFor the purposes of this report, the geographical coordinates of Passagem Franca are -6.180 deg latitude, -43.784 deg longitude, and 778 ft elevation. The topography within 2 miles of Passagem Franca contains significant variations in elevation, with a maximum elevation change of 551 feet and an average elevation above sea level of 831 feet. Within 10 miles contains significant variations in elevation (971 feet). Within 50 miles also contains very significant variations in elevation (1,381 feet). The area within 2 miles of Passagem Franca is covered by trees (54%), shrubs (25%), and grassland (18%), within 10 miles by trees (76%) and shrubs (17%), and within 50 miles by trees (64%) and shrubs (22%). Data SourcesThis report illustrates the typical weather in Passagem Franca, 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 is only a single weather station, Teresina Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Passagem Franca. At a distance of 164 kilometers from Passagem Franca, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere . The weight assigned to the MERRA-2 value depends on the distance from Passagem Franca to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 22%, making the weight assigned to the weather station 78%. 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. |