Summer Weather in Miyazaki Japan

Daily high temperatures increase by 9°F, from 77°F to 85°F, rarely falling below 72°F or exceeding 94°F. The highest daily average high temperature is 87°F on July 27.

Daily low temperatures increase by 9°F, from 65°F to 74°F, rarely falling below 60°F or exceeding 79°F. The highest daily average low temperature is 77°F on August 2.

For reference, on July 26, the hottest day of the year, temperatures in Miyazaki typically range from 77°F to 87°F, while on January 20, the coldest day of the year, they range from 38°F to 54°F.

The figure below shows you a compact characterization of the hourly average summer 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.

Beaufort, United States (7,493 miles away); Çırtıman, Turkey (5,214 miles); and Jūybār, Iran (4,370 miles) are the far-away foreign places with temperatures most similar to Miyazaki (view comparison).

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The summer in Miyazaki experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 66% to 53%. The highest chance of overcast or mostly cloudy conditions is 78% on June 26.

The clearest day of the summer is August 31, with clear, mostly clear, or partly cloudy conditions 47% of the time.

For reference, on June 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 78%, while on December 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Miyazaki, the chance of a wet day over the course of the summer is essentially constant, remaining around 53% throughout.

For reference, the year's highest daily chance of a wet day is 62% on June 22, and its lowest chance is 17% on December 26.

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 summer in Miyazaki is very rapidly decreasing, starting the season at 12.3 inches, when it rarely exceeds 21.6 inches or falls below 5.5 inches, and ending the season at 8.4 inches, when it rarely exceeds 16.4 inches or falls below 2.9 inches.

The highest average 31-day accumulation is 16.6 inches on June 21.

Over the course of the summer in Miyazaki, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 16 minutes, implying an average daily decrease of 50 seconds, and weekly decrease of 5 minutes, 49 seconds.

The shortest day of the summer is August 31, with 12 hours, 50 minutes of daylight and the longest day is June 21, with 14 hours, 14 minutes of daylight.

The earliest sunrise of the summer in Miyazaki is 5:07 AM on June 11 and the latest sunrise is 41 minutes later at 5:49 AM on August 31.

The latest sunset is 7:24 PM on June 30 and the earliest sunset is 45 minutes earlier at 6:39 PM on August 31.

Daylight saving time is not observed in Miyazaki during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:08 AM and sets 14 hours, 14 minutes later, at 7:23 PM, while on December 21, the shortest day of the year, it rises at 7:10 AM and sets 10 hours, 4 minutes later, at 5:14 PM.

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.

The figure below presents a compact representation of key lunar data for the summer 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.

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 Miyazaki is very rapidly increasing during the summer, rising from 40% to 94% over the course of the season.

The highest chance of a muggy day during the summer is 100% on August 2.

For reference, on July 31, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 25, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Miyazaki is essentially constant during the summer, remaining within 0.3 miles per hour of 7.7 miles per hour throughout.

For reference, on February 23, the windiest day of the year, the daily average wind speed is 9.0 miles per hour, while on May 31, the calmest day of the year, the daily average wind speed is 7.3 miles per hour.

The wind direction in Miyazaki during the summer is predominantly out of the east from June 1 to June 12 and from July 30 to August 31 and the west from June 12 to July 30.

Miyazaki 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 Miyazaki is rapidly increasing during the summer, rising by 9°F, from 73°F to 82°F, over the course of the season.

The highest average surface water temperature during the summer is 82°F on August 17.

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 Miyazaki typically lasts for 9.9 months (301 days), from around February 20 to around December 17, rarely starting before January 25 or after March 12, and rarely ending before November 25 or after January 6.

The summer in Miyazaki is reliably fully 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 Miyazaki are very rapidly increasing during the summer, increasing by 2,594°F, from 1,247°F to 3,841°F, over the course of the season.

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 Miyazaki is essentially constant during the summer, remaining within 0.3 kWh of 5.7 kWh throughout.

The highest average daily incident shortwave solar energy during the summer is 6.0 kWh on July 22.

For the purposes of this report, the geographical coordinates of Miyazaki are 31.917 deg latitude, 131.417 deg longitude, and 36 ft elevation.

The topography within 2 miles of Miyazaki contains only modest variations in elevation, with a maximum elevation change of 233 feet and an average elevation above sea level of 32 feet. Within 10 miles contains only modest variations in elevation (2,260 feet). Within 50 miles contains large variations in elevation (5,745 feet).

The area within 2 miles of Miyazaki is covered by cropland (42%), water (23%), trees (14%), and grassland (13%), within 10 miles by water (42%) and trees (35%), and within 50 miles by water (58%) and trees (35%).