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Climate and Average Weather Year Round in Bulangan Indonesia

In Bulangan, the wet season is overcast, the dry season is partly cloudy, and it is hot and oppressive year round. Over the course of the year, the temperature typically varies from 75°F to 91°F and is rarely below 72°F or above 95°F.

Based on the beach/pool score, the best time of year to visit Bulangan for hot-weather activities is from mid June to late September.

Climate in Bulangan

hotJanFebMarAprMayJunJulAugSepOctNovDecNowNow48%48%9%9%overcastclearprecipitation: 11.5 inprecipitation: 11.5 in0.3 in0.3 inmuggy: 100%muggy: 100%94%94%beach/pool score: 7.1beach/pool score: 7.13.73.7
Bulangan weather by month. Click on each chart for more information.

The temperature in Bulangan varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

Average High and Low Temperature in Bulangan

Average High and Low Temperature in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FAug 589°FAug 589°FOct 2191°FOct 2191°F75°F75°F78°F78°FSep 1991°FSep 1991°FDec 2688°FDec 2688°FMar 1488°FMar 1488°F77°F77°F77°F77°F77°F77°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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 88°F88°F88°F89°F90°F89°F88°F89°F90°F91°F90°F89°F
Temp. 81°F81°F82°F83°F84°F83°F82°F82°F83°F84°F84°F82°F
Low 77°F77°F77°F78°F78°F77°F76°F75°F77°F78°F78°F77°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 Bulangan

Average Hourly Temperature in BulanganJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowwarmwarmhot
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.

São Luís, Brazil (10,712 miles away) is the far-away foreign place with temperatures most similar to Bulangan (view comparison).

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In Bulangan, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Bulangan begins around May 5 and lasts for 5.1 months, ending around October 10.

The clearest month of the year in Bulangan is August, during which on average the sky is clear, mostly clear, or partly cloudy 45% of the time.

The cloudier part of the year begins around October 10 and lasts for 6.9 months, ending around May 5.

The cloudiest month of the year in Bulangan is January, during which on average the sky is overcast or mostly cloudy 90% of the time.

Cloud Cover Categories in Bulangan

Cloud Cover Categories in BulanganclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 448%Aug 448%Jan 219%Jan 219%May 528%May 528%Oct 1029%Oct 1029%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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 90%88%82%77%68%59%56%55%63%74%86%88%
Clearer 10%12%18%23%32%41%44%45%37%26%14%12%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Bulangan varies very significantly throughout the year.

The wetter season lasts 5.8 months, from November 9 to May 1, with a greater than 41% chance of a given day being a wet day. The month with the most wet days in Bulangan is January, with an average of 23.3 days with at least 0.04 inches of precipitation.

The drier season lasts 6.2 months, from May 1 to November 9. The month with the fewest wet days in Bulangan is August, with an average of 1.8 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Bulangan is January, with an average of 23.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 77% on January 19.

Daily Chance of Precipitation in Bulangan

Daily Chance of Precipitation in BulanganwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 1977%Jan 1977%Aug 175%Aug 175%Nov 941%Nov 941%May 141%May 141%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 23.3d21.6d19.3d14.8d10.3d6.3d3.6d1.8d2.5d6.8d14.0d20.5d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Bulangan experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Bulangan. The month with the most rain in Bulangan is January, with an average rainfall of 11.3 inches.

The month with the least rain in Bulangan is August, with an average rainfall of 0.3 inches.

Average Monthly Rainfall in Bulangan

Average Monthly Rainfall in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 inJan 2411.5 inJan 2411.5 inAug 220.3 inAug 220.3 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 11.3″10.6″8.1″5.4″3.1″2.2″1.0″0.3″0.7″2.0″4.8″9.2″

The length of the day in Bulangan does not vary substantially over the course of the year, staying within 31 minutes of 12 hours throughout. In 2024, the shortest day is June 21, with 11 hours, 43 minutes of daylight; the longest day is December 21, with 12 hours, 32 minutes of daylight.

Hours of Daylight and Twilight in Bulangan

Hours of Daylight and Twilight in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2212 hr, 6 minSep 2212 hr, 32 minDec 2112 hr, 32 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2011 hr, 43 minJun 2111 hr, 43 minJun 21daydaynightNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 12.5h12.3h12.1h11.9h11.8h11.7h11.8h11.9h12.1h12.3h12.4h12.5h

The earliest sunrise is at 5:02 AM on November 14, and the latest sunrise is 42 minutes later at 5:43 AM on July 16. The earliest sunset is at 5:20 PM on May 24, and the latest sunset is 36 minutes later at 5:56 PM on January 31.

Daylight saving time (DST) is not observed in Bulangan during 2024.

Sunrise & Sunset with Twilight in Bulangan

Sunrise & Sunset with Twilight in BulanganJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMNov 145:02 AMNov 145:02 AM5:56 PMJan 315:56 PMJan 31May 245:20 PMMay 245:20 PM5:43 AMJul 165:43 AMJul 16daynightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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 Bulangan

Solar Elevation and Azimuth in BulanganJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040404050505050606060607070708080000010101010202020203030303040404040505050506060607070806090NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 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 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.

Moon Rise, Set & Phases in Bulangan

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 perceived humidity level in Bulangan, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 3% of 97% throughout.

Humidity Comfort Levels in Bulangan

Humidity Comfort Levels in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 2894%Aug 2894%100%Feb 13100%Feb 13NowNowmiserablemiserableoppressiveoppressivemuggymuggy
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 31.0d29.0d31.0d30.0d30.9d29.7d30.2d29.3d28.4d30.3d29.9d31.0d

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 Bulangan experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.5 months, from May 26 to October 10, with average wind speeds of more than 7.7 miles per hour. The windiest month of the year in Bulangan is August, with an average hourly wind speed of 9.4 miles per hour.

The calmer time of year lasts for 7.5 months, from October 10 to May 26. The calmest month of the year in Bulangan is November, with an average hourly wind speed of 6.1 miles per hour.

Average Wind Speed in Bulangan

Average Wind Speed in BulanganwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphAug 139.5 mphAug 139.5 mphApr 25.8 mphApr 25.8 mphMay 267.7 mphMay 267.7 mphOct 107.7 mphOct 107.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 9.08.86.66.27.48.29.09.48.97.46.17.2

The predominant average hourly wind direction in Bulangan varies throughout the year.

The wind is most often from the east for 7.5 months, from March 26 to November 12, with a peak percentage of 78% on May 29. The wind is most often from the north for 1.7 weeks, from November 12 to November 24, with a peak percentage of 33% on November 20. The wind is most often from the west for 4.1 months, from November 24 to March 26, with a peak percentage of 70% on January 1.

Wind Direction in Bulangan

Wind Direction in BulanganWENWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
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).

Bulangan 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 water temperature does not vary significantly over the course of the year, remaining within 1°F of 84°F throughout.

Average Water Temperature in Bulangan

Average Water Temperature in BulanganJanFebMarAprMayJunJulAugSepOctNovDec81°F81°F82°F82°F83°F83°F84°F84°F85°F85°F86°F86°F87°F87°FNov 1486°FNov 1486°F83°FAug 1183°FAug 11Jul 983°FJul 983°FSep 1383°FSep 1383°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 84°F83°F84°F85°F85°F84°F83°F83°F83°F84°F85°F85°F

To characterize how pleasant the weather is in Bulangan throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Bulangan for general outdoor tourist activities is from early July to early September, with a peak score in the first week of August.

Tourism Score in Bulangan

Tourism Score in Bulanganbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.94.92.82.82.92.9NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Bulangan for hot-weather activities is from mid June to late September, with a peak score in the first week of August.

Beach/Pool Score in Bulangan

Beach/Pool Score in Bulanganbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.17.13.73.7NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 Bulangan 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 Bulangan

Time Spent in Various Temperature Bands and the Growing Season in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 2100%Jul 2NowNowwarmhotcomfortable
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.

Growing Degree Days in Bulangan

Growing Degree Days in BulanganJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJul 490°FJul 490°FAug 271,800°FAug 271,800°FJun 3011,635°FJun 3011,635°FNowNow
The average growing degree days accumulated over the course of the year, 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 experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.2 months, from August 10 to October 17, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest month of the year in Bulangan is September, with an average of 6.8 kWh.

The darker period of the year lasts for 3.8 months, from November 25 to March 19, with an average daily incident shortwave energy per square meter below 4.7 kWh. The darkest month of the year in Bulangan is January, with an average of 4.2 kWh.

Average Daily Incident Shortwave Solar Energy in Bulangan

Average Daily Incident Shortwave Solar Energy in BulanganbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSep 156.8 kWhSep 156.8 kWhJan 204.2 kWhJan 204.2 kWhNov 254.7 kWhNov 254.7 kWhMar 194.7 kWhMar 194.7 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 4.24.34.64.85.15.25.76.46.86.35.14.3

For the purposes of this report, the geographical coordinates of Bulangan are -6.979 deg latitude, 112.392 deg longitude, and 36 ft elevation.

The topography within 2 miles of Bulangan contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 38 feet. Within 10 miles contains only modest variations in elevation (551 feet). Within 50 miles contains significant variations in elevation (5,456 feet).

The area within 2 miles of Bulangan is covered by cropland (55%) and trees (26%), within 10 miles by cropland (41%) and trees (24%), and within 50 miles by water (54%) and cropland (24%).

This report illustrates the typical weather in Bulangan, 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 is only a single weather station, Surabaya / Perak, in our network suitable to be used as a proxy for the historical temperature and dew point records of Bulangan.

At a distance of 45 kilometers from Bulangan, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

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

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.

Please review our full terms contained on our Terms of Service page.