Summer Weather at Soekarno-Hatta International Airport IndonesiaDaily high temperatures are around 87°F, rarely falling below 82°F or exceeding 92°F. The lowest daily average high temperature is 85°F on January 29. Daily low temperatures are around 75°F, rarely falling below 73°F or exceeding 77°F. The lowest daily average low temperature is 75°F on February 7. For reference, on October 5, the hottest day of the year, temperatures at Soekarno-Hatta International Airport typically range from 75°F to 90°F, while on August 10, the coldest day of the year, they range from 74°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. Belém, Brazil (10,657 miles away) is the far-away foreign place with temperatures most similar to Soekarno-Hatta International Airport (view comparison). CloudsThe summer at Soekarno-Hatta International Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 89% throughout the season. The highest chance of overcast or mostly cloudy conditions is 91% on January 30. The clearest day of the summer is February 28, with clear, mostly clear, or partly cloudy conditions 13% of the time. For reference, on January 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 91%, while on July 31, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Soekarno-Hatta International Airport, the chance of a wet day over the course of the summer is rapidly increasing, starting the season at 61% and ending it at 68%. For reference, the year's highest daily chance of a wet day is 77% on January 27, and its lowest chance is 17% on August 10. 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 Soekarno-Hatta International Airport is very rapidly increasing, starting the season at 6.5 inches, when it rarely exceeds 9.9 inches or falls below 3.6 inches, and ending the season at 8.6 inches, when it rarely exceeds 13.1 inches or falls below 5.0 inches. The highest average 31-day accumulation is 11.8 inches on January 28. SunOver the course of the summer at Soekarno-Hatta International Airport, the length of the day is essentially constant. The shortest day of the summer is February 28, with 12 hours, 13 minutes of daylight and the longest day is December 22, with 12 hours, 29 minutes of daylight. The earliest sunrise of the summer at Soekarno-Hatta International Airport is 5:28 AM on December 1 and the latest sunrise is 30 minutes later at 5:59 AM on February 26. The earliest sunset is 5:56 PM on December 1 and the latest sunset is 22 minutes later at 6:17 PM on February 1. Daylight saving time is not observed at Soekarno-Hatta International Airport during 2024. For reference, on December 21, the longest day of the year, the Sun rises at 5:37 AM and sets 12 hours, 29 minutes later, at 6:06 PM, while on June 20, the shortest day of the year, it rises at 6:01 AM and sets 11 hours, 46 minutes later, at 5:48 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 Soekarno-Hatta International Airport is essentially constant during the summer, remaining around 100% throughout. For reference, on January 17, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 28, the least muggy day of the year, there are muggy conditions 99% 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 Soekarno-Hatta International Airport is gradually increasing during the summer, increasing from 6.3 miles per hour to 6.9 miles per hour over the course of the season. For reference, on January 14, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on October 31, the calmest day of the year, the daily average wind speed is 5.1 miles per hour. The highest daily average wind speed during the summer is 7.8 miles per hour on January 14. The hourly average wind direction at Soekarno-Hatta International Airport throughout the summer is predominantly from the west, with a peak proportion of 68% on December 28. Water TemperatureSoekarno-Hatta International Airport 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 Soekarno-Hatta International Airport is essentially constant during the summer, remaining within 1°F of 84°F throughout. The lowest average surface water temperature during the summer is 83°F on January 31. 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 Soekarno-Hatta International Airport 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 Soekarno-Hatta International Airport are very rapidly increasing during the summer, increasing by 2,657°F, from 4,705°F to 7,362°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 Soekarno-Hatta International Airport is essentially constant during the summer, remaining within 0.1 kWh of 4.4 kWh throughout. The lowest average daily incident shortwave solar energy during the summer is 4.3 kWh on January 30. TopographyFor the purposes of this report, the geographical coordinates of Soekarno-Hatta International Airport are -6.126 deg latitude, 106.656 deg longitude, and 36 ft elevation. The topography within 2 miles of Soekarno-Hatta International Airport contains significant variations in elevation, with a maximum elevation change of 492 feet and an average elevation above sea level of 28 feet. Within 10 miles also contains significant variations in elevation (518 feet). Within 50 miles contains significant variations in elevation (9,944 feet). The area within 2 miles of Soekarno-Hatta International Airport is covered by cropland (46%) and artificial surfaces (37%), within 10 miles by artificial surfaces (48%) and water (23%), and within 50 miles by water (48%) and cropland (19%). Data SourcesThis report illustrates the typical weather at Soekarno-Hatta International Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointSoekarno-Hatta International Airport 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. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. The stations on which we may fall back are Curug / Budiarto, Halim Perdanakusuma Airport, and Radin Inten II Airport. 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. |