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Winter Weather in Bulolo Papua New Guinea

Daily high temperatures are around 79°F, rarely falling below 75°F or exceeding 84°F. The lowest daily average high temperature is 78°F on June 29.

Daily low temperatures are around 68°F, rarely falling below 64°F or exceeding 71°F. The lowest daily average low temperature is 67°F on August 13.

For reference, on November 10, the hottest day of the year, temperatures in Bulolo typically range from 70°F to 82°F, while on August 10, the coldest day of the year, they range from 67°F to 79°F.

Average High and Low Temperature in the Winter in Bulolo

Average High and Low Temperature in the Winter in BuloloJunJulAug64°F64°F66°F66°F68°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°FFallSpringJun 2878°FJun 2878°F68°F68°FJun 178°FJun 178°F69°F69°FAug 3180°FAug 3180°F67°F67°FAug 178°FAug 178°F67°F67°F
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 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.

Average Hourly Temperature in the Winter in Bulolo

Average Hourly Temperature in the Winter in BuloloJunJulAug12 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 AMFallSpringcomfortablecomfortablewarm
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.

Alexandria, Jamaica (9,393 miles away); Bucaramanga, Colombia (9,722 miles); and Nansio, Tanzania (7,822 miles) are the far-away foreign places with temperatures most similar to Bulolo (view comparison).

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The winter in Bulolo experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 84% to 78%. The lowest chance of overcast or mostly cloudy conditions is 75% on August 12.

The clearest day of the winter is August 12, with clear, mostly clear, or partly cloudy conditions 25% of the time.

For reference, on January 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 97%, while on August 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 25%.

Cloud Cover Categories in the Winter in Bulolo

Cloud Cover Categories in the Winter in BuloloJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringJan 203%Jan 203%Jun 116%Jun 116%Aug 3122%Aug 3122%Jul 117%Jul 117%Aug 124%Aug 124%partly cloudymostly cloudyovercastmostly clearclear
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 Bulolo, the chance of a wet day over the course of the winter is gradually decreasing, starting the season at 25% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 43% on March 2, and its lowest chance is 20% on September 29.

Probability of Precipitation in the Winter in Bulolo

Probability of Precipitation in the Winter in BuloloJunJulAug0%0%5%5%10%10%15%15%20%20%25%25%30%30%FallSpringJun 125%Jun 125%Aug 3122%Aug 3122%Jul 124%Jul 124%Aug 122%Aug 122%rain
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 winter in Bulolo is essentially constant, remaining about 4.1 inches throughout, and rarely exceeding 13.0 inches or falling below -0.0 inches.

Average Monthly Rainfall in the Winter in Bulolo

Average Monthly Rainfall in the Winter in BuloloJunJulAug0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inFallSpringJun 14.2 inJun 14.2 inAug 314.2 inAug 314.2 inJul 13.9 inJul 13.9 inAug 14.3 inAug 14.3 in
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 winter in Bulolo, the length of the day is essentially constant. The shortest day of the winter is June 20, with 11 hours, 42 minutes of daylight and the longest day is August 31, with 11 hours, 58 minutes of daylight.

Hours of Daylight and Twilight in the Winter in Bulolo

Hours of Daylight and Twilight in the Winter in BuloloJunJulAug0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringJun 2111 hr, 42 minJun 2111 hr, 42 mindaydaydaydaynightAug 3111 hr, 58 minAug 3111 hr, 58 minAug 111 hr, 48 minAug 111 hr, 48 min
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 latest sunrise of the winter in Bulolo is 6:27 AM on July 15 and the earliest sunrise is 12 minutes earlier at 6:14 AM on August 31.

The earliest sunset is 6:03 PM on June 1 and the latest sunset is 11 minutes later at 6:14 PM on August 10.

Daylight saving time is not observed in Bulolo during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:55 AM and sets 12 hours, 33 minutes later, at 6:27 PM, while on June 20, the shortest day of the year, it rises at 6:23 AM and sets 11 hours, 42 minutes later, at 6:06 PM.

Sunrise & Sunset with Twilight in the Winter in Bulolo

Sunrise & Sunset with Twilight in the Winter in BuloloJunJulAug2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring6:14 AM6:14 AMAug 316:12 PMAug 316:12 PM6:23 AM6:23 AMAug 106:14 PMAug 106:14 PM6:19 AM6:19 AMJun 16:03 PMJun 16:03 PM6:27 AM6:27 AMJul 156:11 PMJul 156:11 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. 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 Winter in Bulolo

Solar Elevation and Azimuth in the Winter in BuloloJunJulAug12 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 AMFallSpring001020203030405050606000101020303040405060
northeastsouthwest
Solar elevation and azimuth in the the winter 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 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.

Moon Rise, Set & Phases in the Winter in Bulolo

Moon Rise, Set & Phases in the Winter in BuloloJunJulAug12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringMay 81:23 PMMay 81:23 PMMay 2311:54 PMMay 2311:54 PMJun 610:38 PMJun 610:38 PMJun 2211:09 AMJun 2211:09 AMJul 68:58 AMJul 68:58 AMJul 218:18 PMJul 218:18 PMAug 49:14 PMAug 49:14 PMAug 204:26 AMAug 204:26 AMSep 311:56 AMSep 311:56 AMSep 1812:35 PMSep 1812:35 PM5:59 AM5:59 AM6:06 PM6:06 PM5:41 PM5:41 PM6:34 AM6:34 AM5:43 PM5:43 PM5:18 PM5:18 PM6:19 AM6:19 AM6:30 AM6:30 AM6:05 PM6:05 PM7:01 AM7:01 AM6:07 PM6:07 PM5:48 PM5:48 PM6:33 AM6:33 AM6:12 AM6:12 AM6:22 PM6:22 PM6:20 PM6:20 PM6:45 AM6:45 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 Bulolo is very rapidly decreasing during the winter, falling from 79% to 40% over the course of the season.

The lowest chance of a muggy day during the winter is 37% on August 23.

For reference, on April 13, the muggiest day of the year, there are muggy conditions 91% of the time, while on August 16, the least muggy day of the year, there are muggy conditions 37% of the time.

Humidity Comfort Levels in the Winter in Bulolo

Humidity Comfort Levels in the Winter in BuloloJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringAug 2337%Aug 2337%Jun 179%Jun 179%Jul 160%Jul 160%Aug 141%Aug 141%muggymuggyhumidhumidcomfortablecomfortableoppressiveoppressive
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 Bulolo is essentially constant during the winter, remaining within 0.2 miles per hour of 2.8 miles per hour throughout.

For reference, on September 2, the windiest day of the year, the daily average wind speed is 3.0 miles per hour, while on April 8, the calmest day of the year, the daily average wind speed is 2.2 miles per hour.

Average Wind Speed in the Winter in Bulolo

Average Wind Speed in the Winter in BuloloJunJulAug0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mphFallSpringJun 12.6 mphJun 12.6 mphAug 313.0 mphAug 313.0 mphJul 12.7 mphJul 12.7 mphAug 12.9 mphAug 12.9 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Bulolo throughout the winter is predominantly from the east, with a peak proportion of 95% on August 31.

Wind Direction in the Winter in Bulolo

Wind Direction in the Winter in BuloloJunJulAug0%100%20%80%40%60%60%40%80%20%100%0%FallSpringeastsouth
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).

Bulolo 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 Bulolo is gradually decreasing during the winter, falling by 2°F, from 83°F to 82°F, over the course of the season.

The lowest average surface water temperature during the winter is 81°F on August 15.

Average Water Temperature in the Winter in Bulolo

Average Water Temperature in the Winter in BuloloJunJulAug79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°F86°F86°F87°F87°FFallSpringAug 1581°FAug 1581°FJun 183°FJun 183°FAug 3182°FAug 3182°FJul 182°FJul 182°FAug 181°FAug 181°F
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 Bulolo 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 Winter in Bulolo

Time Spent in Various Temperature Bands and the Growing Season in the Winter in BuloloJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpring100%Jul 17100%Jul 17comfortablewarmcool
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 Bulolo are very rapidly decreasing during the winter, decreasing by 6,566°F, from 7,877°F to 1,311°F, over the course of the season.

Growing Degree Days in the Winter in Bulolo

Growing Degree Days in the Winter in BuloloJunJulAug1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°FFallSpringJun 17,877°FJun 17,877°FAug 311,311°FAug 311,311°FJul 11°FJul 11°FAug 1662°FAug 1662°F
The average growing degree days accumulated over the course of the winter, 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 Bulolo is increasing during the winter, rising by 1.0 kWh, from 4.4 kWh to 5.4 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Winter in Bulolo

Average Daily Incident Shortwave Solar Energy in the Winter in BuloloJunJulAug0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhFallSpringJun 14.4 kWhJun 14.4 kWhAug 315.4 kWhAug 315.4 kWhJul 14.3 kWhJul 14.3 kWhAug 14.9 kWhAug 14.9 kWh
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 Bulolo are -7.200 deg latitude, 146.646 deg longitude, and 2,133 ft elevation.

The topography within 2 miles of Bulolo contains very significant variations in elevation, with a maximum elevation change of 948 feet and an average elevation above sea level of 2,325 feet. Within 10 miles contains very significant variations in elevation (6,010 feet). Within 50 miles also contains extreme variations in elevation (11,424 feet).

The area within 2 miles of Bulolo is covered by trees (41%), cropland (35%), grassland (13%), and shrubs (11%), within 10 miles by trees (70%) and cropland (14%), and within 50 miles by trees (69%) and water (16%).

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

Bulolo is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Bulolo, according to the International Standard Atmosphere .

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.

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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