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Average Weather in Grati Satu Indonesia

In Grati Satu, 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 71°F to 91°F and is rarely below 68°F or above 94°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in Grati SatuJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablehotwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Grati Satu, 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 Grati Satu begins around May 1 and lasts for 5.6 months, ending around October 21. On August 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 54% of the time.

The cloudier part of the year begins around October 21 and lasts for 6.4 months, ending around May 1. On February 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 90% of the time, and clear, mostly clear, or partly cloudy 10% of the time.

Cloud Cover Categories

Cloud Cover Categories in Grati SatuclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 246%Aug 246%Feb 310%Feb 310%May 128%May 128%Oct 2128%Oct 2128%mostly clearpartly cloudyclearovercastmostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 5.2 months, from November 17 to April 24, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 65% on February 1.

The drier season lasts 6.8 months, from April 24 to November 17. The smallest chance of a wet day is 4% on August 18.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 65% on February 1.

Daily Chance of Precipitation

Daily Chance of Precipitation in Grati SatuwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 165%Feb 165%Aug 184%Aug 184%Jan 159%Jan 159%Nov 1735%Nov 1735%Apr 2435%Apr 2435%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 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. Grati Satu experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Grati Satu. The most rain falls during the 31 days centered around January 29, with an average total accumulation of 10.7 inches.

The least rain falls around August 21, with an average total accumulation of 0.5 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Grati SatuJanFebMarAprMayJunJulAugSepOctNovDec0 in5 in10 in15 inJan 2910.7 inJan 2910.7 inAug 210.5 inAug 210.5 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 liquid-equivalent snowfall.

Sun

The length of the day in Grati Satu does not vary substantially over the course of the year, staying within 36 minutes of 12 hours throughout. In 2017, the shortest day is June 21, with 11 hours, 39 minutes of daylight; the longest day is December 21, with 12 hours, 36 minutes of daylight.

Hours of Daylight and Twilight

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 is at 4:57 AM on November 15, and the latest sunrise is 45 minutes later at 5:42 AM on July 15. The earliest sunset is at 5:15 PM on May 26, and the latest sunset is 39 minutes later at 5:54 PM on January 29.

Daylight saving time (DST) is not observed in Grati Satu during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Grati SatuJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMNov 154:57 AMNov 154:57 AM5:54 PMJan 295:54 PMJan 29May 265:15 PMMay 265:15 PM5:42 AMJul 155:42 AMJul 15daynightnight
The solar day over the course of the year 2017. 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.

Humidity

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 Grati Satu, 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 4% of 96% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Grati SatuJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 2991%Aug 2991%100%Feb 24100%Feb 24oppressiveoppressivemuggymuggymiserablemiserablehumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Grati Satu experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.1 months, from May 31 to November 4, with average wind speeds of more than 4.0 miles per hour. The windiest day of the year is August 25, with an average hourly wind speed of 5.2 miles per hour.

The calmer time of year lasts for 6.9 months, from November 4 to May 31. The calmest day of the year is March 25, with an average hourly wind speed of 2.8 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the south for 6.0 days, from March 15 to March 21 and for 5.7 months, from July 4 to December 26, with a peak percentage of 82% on October 5. The wind is most often from the east for 3.5 months, from March 21 to July 4, with a peak percentage of 67% on May 10. The wind is most often from the west for 2.6 months, from December 26 to March 15, with a peak percentage of 48% on January 1.

Wind Direction

Wind Direction in Grati SatuWESJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southeastwestnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Grati Satu 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 experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 6.2 months, from November 18 to May 23, with an average temperature above 83°F. The day of the year with the warmest water is March 24, with an average temperature of 84°F.

The time of year with cooler water lasts for 2.4 months, from July 19 to October 1, with an average temperature below 80°F. The day of the year with the coolest water is August 26, with an average temperature of 79°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 2.3 months, from August 18 to October 28, with an average daily incident shortwave energy per square meter above 6.4 kWh. The brightest day of the year is September 28, with an average of 7.0 kWh.

The darker period of the year lasts for 4.3 months, from December 4 to April 14, with an average daily incident shortwave energy per square meter below 4.9 kWh. The darkest day of the year is February 4, with an average of 4.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Grati SatubrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhSep 287.0 kWhSep 287.0 kWhFeb 44.4 kWhFeb 44.4 kWhAug 186.4 kWhAug 186.4 kWhDec 44.9 kWhDec 44.9 kWhApr 144.9 kWhApr 144.9 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.

Topography

For the purposes of this report, the geographical coordinates of Grati Satu are -8.153 deg latitude, 113.218 deg longitude, and 194 ft elevation.

The topography within 2 miles of Grati Satu contains only modest variations in elevation, with a maximum elevation change of 187 feet and an average elevation above sea level of 202 feet. Within 10 miles contains only modest variations in elevation (2,142 feet). Within 50 miles contains large variations in elevation (12,064 feet).

The area within 2 miles of Grati Satu is covered by cropland (48%), trees (22%), and shrubs (21%), within 10 miles by cropland (37%) and trees (36%), and within 50 miles by water (44%) and trees (26%).

Data Sources

This report illustrates the typical weather in Grati Satu, 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 Grati Satu.

For each station, the records are corrected for the elevation difference between that station and Grati Satu 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 Grati Satu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grati Satu and a given station.

The stations contributing to this reconstruction are: Juanda International Airport (57%, 98 kilometers, northwest) and Surabaya (43%, 118 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.