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Fall Weather in Sepang Indonesia

Daily high temperatures are around 81°F, rarely falling below 78°F or exceeding 84°F. The highest daily average high temperature is 82°F on April 20.

Daily low temperatures are around 69°F, rarely falling below 65°F or exceeding 71°F.

For reference, on October 31, the hottest day of the year, temperatures in Sepang typically range from 69°F to 84°F, while on August 28, the coldest day of the year, they range from 67°F to 80°F.

Average High and Low Temperature in the Fall in Sepang

Average High and Low Temperature in the Fall in SepangMarAprMay64°F64°F66°F66°F68°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°FSummerWinterApr 1682°FApr 1682°F69°F69°FMar 181°FMar 181°F69°F69°FMay 3181°FMay 3181°F68°F68°FApr 182°FApr 182°F69°F69°FMay 182°FMay 182°F69°F69°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average fall 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.

Average Hourly Temperature in the Fall in Sepang

Average Hourly Temperature in the Fall in SepangMarAprMay12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSummerWinterNowNowcomfortablecomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Turrialba, Costa Rica (11,175 miles away) and Bucaramanga, Colombia (11,894 miles) are the far-away foreign places with temperatures most similar to Sepang (view comparison).

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The fall in Sepang experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 85% to 62%.

The clearest day of the fall is May 31, with clear, mostly clear, or partly cloudy conditions 38% of the time.

For reference, on January 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 90%, while on August 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 48%.

Cloud Cover Categories in the Fall in Sepang

Cloud Cover Categories in the Fall in SepangMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SummerWinterMar 115%Mar 115%May 3138%May 3138%Apr 121%Apr 121%May 129%May 129%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sepang, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 61% and ending it at 17%.

For reference, the year's highest daily chance of a wet day is 70% on January 22, and its lowest chance is 7% on August 19.

Probability of Precipitation in the Fall in Sepang

Probability of Precipitation in the Fall in SepangMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%SummerWinterMar 161%Mar 161%May 3117%May 3117%Apr 139%Apr 139%May 126%May 126%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 fall in Sepang is very rapidly decreasing, starting the season at 7.7 inches, when it rarely exceeds 12.0 inches or falls below 4.1 inches, and ending the season at 1.5 inches, when it rarely exceeds 4.1 inches or falls below 0.1 inches.

Average Monthly Rainfall in the Fall in Sepang

Average Monthly Rainfall in the Fall in SepangMarAprMay0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 in16 in16 inSummerWinterMar 17.7 inMar 17.7 inMay 311.5 inMay 311.5 inApr 14.2 inApr 14.2 inMay 12.4 inMay 12.4 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of the fall in Sepang, the length of the day is decreasing. From the start to the end of the season, the length of the day decreases by 35 minutes, implying an average daily decrease of 23 seconds, and weekly decrease of 2 minutes, 42 seconds.

The shortest day of the fall is May 31, with 11 hours, 40 minutes of daylight and the longest day is March 1, with 12 hours, 15 minutes of daylight.

Hours of Daylight and Twilight in the Fall in Sepang

Hours of Daylight and Twilight in the Fall in SepangMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSummerWinterMar 2012 hr, 7 minMar 2012 hr, 7 mindaydaydaydaynightMay 3111 hr, 40 minMay 3111 hr, 40 minMay 111 hr, 49 minMay 111 hr, 49 minNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the fall in Sepang is 6:22 AM on April 21 and the latest sunrise is 5 minutes later at 6:27 AM on May 31.

The latest sunset is 6:40 PM on March 1 and the earliest sunset is 32 minutes earlier at 6:08 PM on May 26.

Daylight saving time is not observed in Sepang during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:00 AM and sets 12 hours, 37 minutes later, at 6:36 PM, while on June 20, the shortest day of the year, it rises at 6:32 AM and sets 11 hours, 38 minutes later, at 6:11 PM.

Sunrise & Sunset with Twilight in the Fall in Sepang

Sunrise & Sunset with Twilight in the Fall in SepangMarAprMay2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSummerWinter6:22 AM6:22 AMApr 216:15 PMApr 216:15 PM6:24 AM6:24 AMMar 16:40 PMMar 16:40 PM6:26 AM6:26 AMMay 266:08 PMMay 266:08 PM6:23 AM6:23 AMApr 16:24 PMApr 16:24 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day in the fall. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in the Fall in Sepang

Solar Elevation and Azimuth in the Fall in SepangMarAprMay12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSummerWinter001020203030405050606070800010102030304040506070NowNow
northeastsouthwest
Solar elevation and azimuth in the the fall of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

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

Moon Rise, Set & Phases in the Fall in Sepang

Moon Rise, Set & Phases in the Fall in SepangMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSummerWinterFeb 107:00 AMFeb 107:00 AMFeb 248:31 PMFeb 248:31 PMMar 105:01 PMMar 105:01 PMMar 253:01 PMMar 253:01 PMApr 92:22 AMApr 92:22 AMApr 247:50 AMApr 247:50 AMMay 811:23 AMMay 811:23 AMMay 239:54 PMMay 239:54 PMJun 68:38 PMJun 68:38 PMJun 229:09 AMJun 229:09 AM6:27 AM6:27 AM7:17 PM7:17 PM6:43 PM6:43 PM6:49 AM6:49 AM6:05 AM6:05 AM6:40 PM6:40 PM6:32 PM6:32 PM6:55 AM6:55 AM6:35 AM6:35 AM6:48 PM6:48 PM5:45 PM5:45 PM6:22 AM6:22 AM6:13 AM6:13 AM6:15 PM6:15 PM5:50 PM5:50 PM6:48 AM6:48 AM5:53 PM5:53 PM5:27 PM5:27 PM6:34 AM6:34 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 Sepang is essentially constant during the fall, 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 11, the least muggy day of the year, there are muggy conditions 92% of the time.

Humidity Comfort Levels in the Fall in Sepang

Humidity Comfort Levels in the Fall in SepangMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SummerWinterMar 1100%Mar 1100%May 3199%May 3199%Apr 1100%Apr 1100%May 1100%May 1100%NowNowmiserablemiserableoppressiveoppressivemuggymuggyhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Sepang is increasing during the fall, increasing from 4.2 miles per hour to 5.9 miles per hour over the course of the season.

For reference, on August 9, the windiest day of the year, the daily average wind speed is 7.1 miles per hour, while on March 24, the calmest day of the year, the daily average wind speed is 4.0 miles per hour.

The lowest daily average wind speed during the fall is 4.0 miles per hour on March 24.

Average Wind Speed in the Fall in Sepang

Average Wind Speed in the Fall in SepangMarAprMay0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mphSummerWinterMar 244.0 mphMar 244.0 mphMar 14.2 mphMar 14.2 mphMay 315.9 mphMay 315.9 mphMay 15.2 mphMay 15.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Sepang during the fall is predominantly out of the west from March 1 to March 16 and the east from March 16 to May 31.

Wind Direction in the Fall in Sepang

Wind Direction in the Fall in SepangWESMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%SummerWinterNowNowwesteastnorthsouth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Sepang 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 Sepang is essentially constant during the fall, remaining within 1°F of 83°F throughout.

The highest average surface water temperature during the fall is 84°F on April 2.

Average Water Temperature in the Fall in Sepang

Average Water Temperature in the Fall in SepangMarAprMay79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°F86°F86°FSummerWinterApr 284°FApr 284°FMar 184°FMar 184°FMay 3183°FMay 3183°FMay 184°FMay 184°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Sepang 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.

Time Spent in Various Temperature Bands and the Growing Season in the Fall in Sepang

Time Spent in Various Temperature Bands and the Growing Season in the Fall in SepangMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SummerWinter100%Apr 16100%Apr 16NowNowcomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Sepang are very rapidly increasing during the fall, increasing by 2,243°F, from 5,864°F to 8,107°F, over the course of the season.

Growing Degree Days in the Fall in Sepang

Growing Degree Days in the Fall in SepangMarAprMay6,000°F6,000°F6,500°F6,500°F7,000°F7,000°F7,500°F7,500°F8,000°F8,000°FSummerWinterMar 15,864°FMar 15,864°FMay 318,107°FMay 318,107°FApr 16,620°FApr 16,620°FMay 17,369°FMay 17,369°FNowNow
The average growing degree days accumulated over the course of the fall, with 25th to 75th and 10th to 90th percentile bands.

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 Sepang is gradually increasing during the fall, rising by 0.8 kWh, from 4.5 kWh to 5.3 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the fall is 5.4 kWh on May 10.

Average Daily Incident Shortwave Solar Energy in the Fall in Sepang

Average Daily Incident Shortwave Solar Energy in the Fall in SepangMarAprMay0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhSummerWinterMay 105.4 kWhMay 105.4 kWhMar 14.5 kWhMar 14.5 kWhMay 315.3 kWhMay 315.3 kWhApr 14.9 kWhApr 14.9 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Sepang are -8.309 deg latitude, 114.917 deg longitude, and 1,470 ft elevation.

The topography within 2 miles of Sepang contains large variations in elevation, with a maximum elevation change of 2,041 feet and an average elevation above sea level of 2,064 feet. Within 10 miles contains large variations in elevation (4,616 feet). Within 50 miles also contains extreme variations in elevation (9,859 feet).

The area within 2 miles of Sepang is covered by trees (74%) and cropland (17%), within 10 miles by trees (68%) and cropland (19%), and within 50 miles by water (67%) and trees (19%).

This report illustrates the typical weather in Sepang, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Sepang.

For each station, the records are corrected for the elevation difference between that station and Sepang according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Sepang is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sepang and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Sepang and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All 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.

Disclaimer

The 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.

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