August Weather in Shirone Japan
Daily high temperatures decrease by 2°F, from 85°F to 83°F, rarely falling below 76°F or exceeding 92°F. The highest daily average high temperature is 86°F on August 8.
Daily low temperatures decrease by 3°F, from 74°F to 71°F, rarely falling below 66°F or exceeding 79°F. The highest daily average low temperature is 75°F on August 7.
For reference, on August 7, the hottest day of the year, temperatures in Shirone typically range from 75°F to 86°F, while on January 28, the coldest day of the year, they range from 32°F to 40°F.
Average High and Low Temperature in August in Shirone
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August in Shirone
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 month of August in Shirone experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the month.
The clearest day of the month is August 13, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on January 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on October 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 58%.
Cloud Cover Categories in August in Shirone
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Shirone, the chance of a wet day over the course of August is very rapidly increasing, starting the month at 35% and ending it at 43%.
For reference, the year's highest daily chance of a wet day is 61% on December 9, and its lowest chance is 26% on May 24.
Probability of Precipitation in August in Shirone
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during August in Shirone is gradually increasing, starting the month at 4.9 inches, when it rarely exceeds 8.6 inches or falls below 1.8 inches, and ending the month at 5.3 inches, when it rarely exceeds 8.5 inches or falls below 2.6 inches.
The lowest average 31-day accumulation is 4.6 inches on August 11.
Average Monthly Rainfall in August in Shirone
Over the course of August in Shirone, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 3 minutes, implying an average daily decrease of 2 minutes, 7 seconds, and weekly decrease of 14 minutes, 48 seconds.
The shortest day of the month is August 31, with 13 hours, 2 minutes of daylight and the longest day is August 1, with 14 hours, 6 minutes of daylight.
Hours of Daylight and Twilight in August in Shirone
The earliest sunrise of the month in Shirone is 4:47 AM on August 1 and the latest sunrise is 26 minutes later at 5:12 AM on August 31.
The latest sunset is 6:52 PM on August 1 and the earliest sunset is 38 minutes earlier at 6:15 PM on August 31.
Daylight saving time is not observed in Shirone during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 4:22 AM and sets 14 hours, 47 minutes later, at 7:09 PM, while on December 21, the shortest day of the year, it rises at 6:55 AM and sets 9 hours, 33 minutes later, at 4:28 PM.
Sunrise & Sunset with Twilight in August in Shirone
The figure below presents a compact representation of key lunar data for August 2021. 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 August in Shirone
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 Shirone is rapidly decreasing during August, falling from 93% to 76% over the course of the month.
The highest chance of a muggy day during August is 94% on August 7.
For reference, on August 5, the muggiest day of the year, there are muggy conditions 94% of the time, while on November 10, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August in Shirone
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Shirone is gradually increasing during August, increasing from 4.8 miles per hour to 5.6 miles per hour over the course of the month.
For reference, on February 2, the windiest day of the year, the daily average wind speed is 12.0 miles per hour, while on July 29, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.
Average Wind Speed in August in Shirone
The wind direction in Shirone during August is predominantly out of the west from August 1 to August 15 and the north from August 15 to August 31.
Wind Direction in August in Shirone
Shirone 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 Shirone is essentially constant during August, remaining within 1°F of 78°F throughout.
The highest average surface water temperature during August is 79°F on August 22.
Average Water Temperature in August in Shirone
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).
The growing season in Shirone typically lasts for 8.8 months (270 days), from around March 19 to around December 14, rarely starting before March 2 or after April 6, and rarely ending before November 22 or after January 2.
The month of August in Shirone is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August in Shirone
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
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 Shirone are rapidly increasing during August, increasing by 866°F, from 1,939°F to 2,804°F, over the course of the month.
Growing Degree Days in August in Shirone
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 Shirone is gradually decreasing during August, falling by 0.8 kWh, from 5.9 kWh to 5.0 kWh, over the course of the month.
The highest average daily incident shortwave solar energy during August is 5.9 kWh on August 3.
Average Daily Incident Shortwave Solar Energy in August in Shirone
For the purposes of this report, the geographical coordinates of Shirone are 37.764 deg latitude, 139.022 deg longitude, and -3 ft elevation.
The topography within 2 miles of Shirone is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of -2 feet. Within 10 miles is essentially flat (1,457 feet). Within 50 miles contains very significant variations in elevation (7,024 feet).
The area within 2 miles of Shirone is covered by cropland (95%), within 10 miles by cropland (71%) and trees (18%), and within 50 miles by water (50%) and trees (37%).
This report illustrates the typical weather in Shirone, 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, Niigata Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Shirone.
At a distance of 22 kilometers from Shirone, 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 Shirone 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.
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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
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.