Summer Weather at Chanthaburi ThailandDaily high temperatures are around 87°F, rarely falling below 83°F or exceeding 92°F. The lowest daily average high temperature is 87°F on August 9. Daily low temperatures are around 78°F, rarely falling below 75°F or exceeding 81°F. For reference, on April 14, the hottest day of the year, temperatures at Chanthaburi typically range from 78°F to 91°F, while on January 1, the coldest day of the year, they range from 71°F to 89°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. Acajutla, El Salvador (10,462 miles away); Manaus, Amazonas, Brazil (11,063 miles); and Maracanaú, Ceará, Brazil (9,700 miles) are the far-away foreign places with temperatures most similar to Chanthaburi (view comparison). CloudsThe summer at Chanthaburi experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 92% throughout the season. The clearest day of the summer is July 23, with clear, mostly clear, or partly cloudy conditions 9% of the time. For reference, on May 25, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 93%, while on February 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Chanthaburi, the chance of a wet day over the course of the summer is gradually increasing, starting the season at 71% and ending it at 74%. For reference, the year's highest daily chance of a wet day is 76% on September 17, and its lowest chance is 2% on December 22. 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 at Chanthaburi is very rapidly increasing, starting the season at 13.7 inches, when it rarely exceeds 19.0 inches or falls below 8.2 inches, and ending the season at 16.0 inches, when it rarely exceeds 23.1 inches or falls below 9.7 inches. SunOver the course of the summer at Chanthaburi, the length of the day is gradually decreasing. From the start to the end of the season, the length of the day decreases by 27 minutes, implying an average daily decrease of 18 seconds, and weekly decrease of 2 minutes, 6 seconds. The shortest day of the summer is August 31, with 12 hours, 22 minutes of daylight and the longest day is June 21, with 12 hours, 52 minutes of daylight. The earliest sunrise of the summer at Chanthaburi is 5:44 AM on June 1 and the latest sunrise is 16 minutes later at 6:00 AM on August 31. The latest sunset is 6:41 PM on July 10 and the earliest sunset is 19 minutes earlier at 6:22 PM on August 31. Daylight saving time is not observed at Chanthaburi during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:47 AM and sets 12 hours, 52 minutes later, at 6:39 PM, while on December 21, the shortest day of the year, it rises at 6:28 AM and sets 11 hours, 23 minutes later, at 5:51 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 at Chanthaburi is essentially constant during the summer, remaining around 100% throughout. For reference, on April 29, 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 55% 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 at Chanthaburi is essentially constant during the summer, remaining within 0.5 miles per hour of 7.3 miles per hour throughout. For reference, on August 5, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on October 8, the calmest day of the year, the daily average wind speed is 4.7 miles per hour. The highest daily average wind speed during the summer is 7.8 miles per hour on August 5. The wind direction at Chanthaburi during the summer is predominantly out of the south from June 1 to June 10 and the west from June 10 to August 31. Water TemperatureChanthaburi 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 Chanthaburi is gradually decreasing during the summer, falling by 2°F, from 86°F to 84°F, over the course of the season. 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 at Chanthaburi 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 at Chanthaburi are very rapidly increasing during the summer, increasing by 2,880°F, from 4,723°F to 7,603°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 at Chanthaburi is essentially constant during the summer, remaining within 0.1 kWh of 4.0 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Chanthaburi are 12.600 deg latitude, 102.117 deg longitude, and 23 ft elevation. The topography within 2 miles of Chanthaburi contains only modest variations in elevation, with a maximum elevation change of 102 feet and an average elevation above sea level of 20 feet. Within 10 miles contains only modest variations in elevation (3,232 feet). Within 50 miles contains large variations in elevation (5,515 feet). The area within 2 miles of Chanthaburi is covered by cropland (90%), within 10 miles by cropland (63%) and trees (19%), and within 50 miles by cropland (35%) and water (34%). Data SourcesThis report illustrates the typical weather at Chanthaburi, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointChanthaburi 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.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. |