Spring Weather at Halim Perdanakusuma Airport Indonesia

Daily high temperatures are around 90°F, rarely falling below 85°F or exceeding 94°F. The highest daily average high temperature is 91°F on October 2.

Daily low temperatures are around 75°F, rarely falling below 72°F or exceeding 78°F. The highest daily average low temperature is 76°F on November 15.

For reference, on September 26, the hottest day of the year, temperatures at Halim Perdanakusuma Airport typically range from 75°F to 91°F, while on August 6, the coldest day of the year, they range from 74°F to 90°F.

The figure below shows you a compact characterization of the hourly average spring 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 (10,670 miles away) is the far-away foreign place with temperatures most similar to Halim Perdanakusuma Airport (view comparison).

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The spring at Halim Perdanakusuma Airport experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 67% to 89%.

The clearest day of the spring is September 1, with clear, mostly clear, or partly cloudy conditions 33% of the time.

For reference, on January 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 90%, while on July 31, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Halim Perdanakusuma Airport, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 21% and ending it at 62%.

For reference, the year's highest daily chance of a wet day is 75% on January 28, and its lowest chance is 18% on August 10.

Rainfall

To 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 spring at Halim Perdanakusuma Airport is very rapidly increasing, starting the season at 2.1 inches, when it rarely exceeds 5.6 inches or falls below 0.1 inches, and ending the season at 6.9 inches, when it rarely exceeds 10.4 inches or falls below 3.9 inches.

Over the course of the spring at Halim Perdanakusuma Airport, the length of the day is gradually increasing. From the start to the end of the season, the length of the day increases by 28 minutes, implying an average daily increase of 19 seconds, and weekly increase of 2 minutes, 11 seconds.

The shortest day of the spring is September 1, with 11 hours, 59 minutes of daylight and the longest day is November 30, with 12 hours, 27 minutes of daylight.

The latest sunrise of the spring at Halim Perdanakusuma Airport is 5:52 AM on September 1 and the earliest sunrise is 28 minutes earlier at 5:24 AM on November 13.

The earliest sunset is 5:45 PM on October 20 and the latest sunset is 10 minutes later at 5:54 PM on November 30.

Daylight saving time is not observed at Halim Perdanakusuma Airport during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:35 AM and sets 12 hours, 29 minutes later, at 6:05 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 5:46 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.

The figure below presents a compact representation of key lunar data for the spring 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.

We 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 Halim Perdanakusuma Airport is gradually increasing during the spring, rising from 97% to 100% over the course of the season.

For reference, on February 26, 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 97% of the time.

This 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 Halim Perdanakusuma Airport is essentially constant during the spring, remaining within 0.5 miles per hour of 5.3 miles per hour throughout.

For reference, on January 14, the windiest day of the year, the daily average wind speed is 7.4 miles per hour, while on October 31, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.

The lowest daily average wind speed during the spring is 4.8 miles per hour on October 31.

The wind direction at Halim Perdanakusuma Airport during the spring is predominantly out of the east from September 1 to November 11, the north from November 11 to November 19, and the west from November 19 to November 30.

Halim Perdanakusuma 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 Halim Perdanakusuma Airport is essentially constant during the spring, remaining within 1°F of 84°F throughout.

The highest average surface water temperature during the spring is 85°F on November 10.

Definitions 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 Halim Perdanakusuma 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 Halim Perdanakusuma Airport are very rapidly increasing during the spring, increasing by 2,779°F, from 1,879°F to 4,658°F, over the course of the season.

This 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 Halim Perdanakusuma Airport is rapidly decreasing during the spring, falling by 1.7 kWh, from 6.2 kWh to 4.5 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the spring is 6.3 kWh on September 16.

For the purposes of this report, the geographical coordinates of Halim Perdanakusuma Airport are -6.266 deg latitude, 106.892 deg longitude, and 69 ft elevation.

The topography within 2 miles of Halim Perdanakusuma Airport contains only modest variations in elevation, with a maximum elevation change of 138 feet and an average elevation above sea level of 85 feet. Within 10 miles also contains only modest variations in elevation (387 feet). Within 50 miles contains only modest variations in elevation (9,944 feet).

The area within 2 miles of Halim Perdanakusuma Airport is covered by artificial surfaces (91%), within 10 miles by artificial surfaces (70%) and cropland (21%), and within 50 miles by water (38%) and cropland (24%).