Average Weather at Ishigaki Airport Japan
At Ishigaki Airport, the summers are hot, oppressive, wet, windy, and overcast and the winters are comfortable, extremely windy, and partly cloudy. Over the course of the year, the temperature typically varies from 62°F to 89°F and is rarely below 56°F or above 91°F.
Based on the tourism score, the best times of year to visit Ishigaki Airport for warm-weather activities are from mid February to late April and from mid October to mid January.
The hot season lasts for 3.7 months, from June 8 to September 29, with an average daily high temperature above 85°F. The hottest day of the year is July 16, with an average high of 89°F and low of 82°F.
The cool season lasts for 3.1 months, from December 10 to March 13, with an average daily high temperature below 73°F. The coldest day of the year is January 26, with an average low of 62°F and high of 69°F.
Average High and Low Temperature
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
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
At Ishigaki Airport, 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 at Ishigaki Airport begins around September 16 and lasts for 7.6 months, ending around May 2. On November 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 38% of the time.
The cloudier part of the year begins around May 2 and lasts for 4.4 months, ending around September 16. On June 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 82% of the time, and clear, mostly clear, or partly cloudy 18% of the time.
Cloud Cover Categories
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. The chance of wet days at Ishigaki Airport varies throughout the year.
The wetter season lasts 10 months, from August 4 to June 18, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 50% on May 31.
The drier season lasts 1.5 months, from June 18 to August 4. The smallest chance of a wet day is 23% on July 9.
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 50% on May 31.
Daily Chance of Precipitation
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. Ishigaki Airport experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year at Ishigaki Airport. The most rain falls during the 31 days centered around September 14, with an average total accumulation of 6.7 inches.
The least rain falls around January 20, with an average total accumulation of 2.1 inches.
Average Monthly Rainfall
The length of the day at Ishigaki Airport varies over the course of the year. In 2018, the shortest day is December 22, with 10 hours, 38 minutes of daylight; the longest day is June 21, with 13 hours, 39 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:54 AM on June 9, and the latest sunrise is 1 hour, 35 minutes later at 7:28 AM on January 14. The earliest sunset is at 5:54 PM on November 29, and the latest sunset is 1 hour, 41 minutes later at 7:35 PM on July 3.
Daylight saving time (DST) is not observed at Ishigaki Airport during 2018.
Sunrise & Sunset with 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.
Ishigaki Airport experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 8.7 months, from March 8 to November 30, during which time the comfort level is muggy, oppressive, or miserable at least 32% of the time. The muggiest day of the year is July 25, with muggy conditions 100% of the time.
The least muggy day of the year is January 12, with muggy conditions 10% of the time.
Humidity Comfort Levels
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 at Ishigaki Airport experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.6 months, from September 24 to March 12, with average wind speeds of more than 15.6 miles per hour. The windiest day of the year is December 2, with an average hourly wind speed of 18.7 miles per hour.
The calmer time of year lasts for 6.4 months, from March 12 to September 24. The calmest day of the year is May 22, with an average hourly wind speed of 12.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Ishigaki Airport varies throughout the year.
The wind is most often from the south for 5.1 months, from March 25 to August 29, with a peak percentage of 79% on June 27. The wind is most often from the east for 3.0 months, from August 29 to November 30, with a peak percentage of 54% on November 11. The wind is most often from the north for 3.8 months, from November 30 to March 25, with a peak percentage of 52% on January 1.
Ishigaki Airport 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 3.4 months, from June 16 to September 29, with an average temperature above 82°F. The day of the year with the warmest water is July 25, with an average temperature of 84°F.
The time of year with cooler water lasts for 3.5 months, from December 24 to April 7, with an average temperature below 75°F. The day of the year with the coolest water is February 6, with an average temperature of 73°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at Ishigaki Airport 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 times of year to visit Ishigaki Airport for general outdoor tourist activities are from mid February to late April and from mid October to mid January, with a peak score in the last week of November.
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 Ishigaki Airport for hot-weather activities is from late September to mid November, with a peak score in the second week of October.
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 at Ishigaki Airport 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
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.
Growing Degree Days
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 2.4 months, from March 21 to June 3, with an average daily incident shortwave energy per square meter above 5.1 kWh. The brightest day of the year is April 12, with an average of 5.6 kWh.
The darker period of the year lasts for 2.3 months, from November 26 to February 6, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest day of the year is December 27, with an average of 3.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Ishigaki Airport are 24.345 deg latitude, 124.187 deg longitude, and 33 ft elevation.
The topography within 2 miles of Ishigaki Airport contains only modest variations in elevation, with a maximum elevation change of 302 feet and an average elevation above sea level of 59 feet. Within 10 miles contains only modest variations in elevation (1,736 feet). Within 50 miles also contains very significant variations in elevation (1,749 feet).
The area within 2 miles of Ishigaki Airport is covered by water (38%), cropland (36%), and grassland (15%), within 10 miles by water (83%), and within 50 miles by water (98%).
This report illustrates the typical weather at Ishigaki Airport, 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
Ishigaki Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
In this case, the only station close and reliable enough to use as a fallback is Miyako Airport.
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.
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.