Winter Weather in Ketapang Indonesia

Daily high temperatures are around 88°F, rarely falling below 85°F or exceeding 91°F.

Daily low temperatures are around 76°F, rarely falling below 74°F or exceeding 79°F. The lowest daily average low temperature is 76°F on August 10.

For reference, on May 17, the hottest day of the year, temperatures in Ketapang typically range from 77°F to 89°F, while on August 8, the coldest day of the year, they range from 76°F to 88°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.

Barranquilla, Colombia (11,739 miles away); Vigia, Pará, Brazil (10,926 miles); and Fortaleza, Ceará, Brazil (10,241 miles) are the far-away foreign places with temperatures most similar to Ketapang (view comparison).

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The winter in Ketapang experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 67% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 63% on June 26.

The clearest day of the winter is June 26, with clear, mostly clear, or partly cloudy conditions 37% of the time.

For reference, on December 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on June 25, 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. In Ketapang, the chance of a wet day over the course of the winter is very rapidly decreasing, starting the season at 45% and ending it at 30%.

For reference, the year's highest daily chance of a wet day is 76% on November 22, and its lowest chance is 24% 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 winter in Ketapang is very rapidly decreasing, starting the season at 7.0 inches, when it rarely exceeds 12.5 inches or falls below 2.5 inches, and ending the season at 4.2 inches, when it rarely exceeds 10.6 inches or falls below 0.4 inches.

The lowest average 31-day accumulation is 3.4 inches on August 13.

Over the course of the winter in Ketapang, the length of the day is essentially constant. The shortest day of the winter is June 20, with 12 hours, 1 minute of daylight and the longest day is August 31, with 12 hours, 4 minutes of daylight.

The earliest sunrise of the winter in Ketapang is 5:37 AM on June 1 and the latest sunrise is 8 minutes later at 5:45 AM on July 23.

The earliest sunset is 5:38 PM on June 1 and the latest sunset is 9 minutes later at 5:47 PM on July 29.

Daylight saving time is not observed in Ketapang during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:31 AM and sets 12 hours, 14 minutes later, at 5:45 PM, while on June 20, the shortest day of the year, it rises at 5:41 AM and sets 12 hours, 1 minute later, at 5:42 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 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.

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 in Ketapang is essentially constant during the winter, remaining around 100% throughout.

For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 3, the least muggy day of the year, there are muggy conditions 100% 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 in Ketapang is increasing during the winter, increasing from 4.6 miles per hour to 5.9 miles per hour over the course of the season.

For reference, on August 10, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on April 25, the calmest day of the year, the daily average wind speed is 3.7 miles per hour.

The highest daily average wind speed during the winter is 6.1 miles per hour on August 11.

The hourly average wind direction in Ketapang throughout the winter is predominantly from the south, with a peak proportion of 59% on August 24.

Ketapang 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 in Ketapang is gradually decreasing during the winter, falling by 3°F, from 86°F to 83°F, over the course of the season.

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 in Ketapang 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 Ketapang are very rapidly decreasing during the winter, decreasing by 8,514°F, from 10,382°F to 1,868°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 in Ketapang is gradually increasing during the winter, rising by 0.8 kWh, from 4.4 kWh to 5.2 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the winter is 5.3 kWh on August 12.

For the purposes of this report, the geographical coordinates of Ketapang are -1.839 deg latitude, 109.977 deg longitude, and 13 ft elevation.

The topography within 2 miles of Ketapang is essentially flat, with a maximum elevation change of 62 feet and an average elevation above sea level of 17 feet. Within 10 miles is essentially flat (121 feet). Within 50 miles contains only modest variations in elevation (3,757 feet).

The area within 2 miles of Ketapang is covered by cropland (43%), trees (26%), grassland (13%), and shrubs (12%), within 10 miles by water (60%) and trees (23%), and within 50 miles by water (63%) and trees (24%).