May Weather at Osaka International Airport Japan

Daily high temperatures increase by 7°F, from 71°F to 79°F, rarely falling below 63°F or exceeding 85°F.

Daily low temperatures increase by 8°F, from 55°F to 63°F, rarely falling below 47°F or exceeding 68°F.

For reference, on August 6, the hottest day of the year, temperatures at Osaka International Airport typically range from 77°F to 91°F, while on January 27, the coldest day of the year, they range from 34°F to 47°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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.

Virginia Beach, United States (7,099 miles away) and Hashtpar, Iran (4,642 miles) are the far-away foreign places with temperatures most similar to Osaka International Airport (view comparison).

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The month of May at Osaka International Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 53% to 59%.

The clearest day of the month is May 7, with clear, mostly clear, or partly cloudy conditions 47% of the time.

For reference, on July 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on December 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Osaka International Airport, the chance of a wet day over the course of May is gradually decreasing, starting the month at 35% and ending it at 32%.

For reference, the year's highest daily chance of a wet day is 53% on July 2, and its lowest chance is 23% on December 28.

Rainfall

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 May at Osaka International Airport is increasing, starting the month at 5.1 inches, when it rarely exceeds 7.5 inches or falls below 2.8 inches, and ending the month at 5.9 inches, when it rarely exceeds 9.9 inches or falls below 2.6 inches.

Over the course of May at Osaka International Airport, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 44 minutes, implying an average daily increase of 1 minute, 28 seconds, and weekly increase of 10 minutes, 15 seconds.

The shortest day of the month is May 1, with 13 hours, 36 minutes of daylight and the longest day is May 31, with 14 hours, 19 minutes of daylight.

The latest sunrise of the month at Osaka International Airport is 5:07 AM on May 1 and the earliest sunrise is 21 minutes earlier at 4:46 AM on May 31.

The earliest sunset is 6:43 PM on May 1 and the latest sunset is 22 minutes later at 7:05 PM on May 31.

Daylight saving time is not observed at Osaka International Airport during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:45 AM and sets 14 hours, 30 minutes later, at 7:14 PM, while on December 21, the shortest day of the year, it rises at 7:01 AM and sets 9 hours, 49 minutes later, at 4:50 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 May 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 at Osaka International Airport is increasing during May, rising from 2% to 10% over the course of the month.

For reference, on August 3, the muggiest day of the year, there are muggy conditions 95% 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 at Osaka International Airport is decreasing during May, decreasing from 8.1 miles per hour to 6.6 miles per hour over the course of the month.

For reference, on March 9, the windiest day of the year, the daily average wind speed is 9.6 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 6.2 miles per hour.

The hourly average wind direction at Osaka International Airport throughout May is predominantly from the south, with a peak proportion of 34% on May 13.

Osaka International 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 surface water temperature at Osaka International Airport is increasing during May, rising by 5°F, from 62°F to 67°F, over the course of the month.

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 at Osaka International Airport typically lasts for 8.9 months (272 days), from around March 15 to around December 12, rarely starting before February 24 or after April 1, and rarely ending before November 25 or after December 31.

The month of May at Osaka International Airport 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 at Osaka International Airport are rapidly increasing during May, increasing by 503°F, from 383°F to 886°F, over the course of the month.

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 at Osaka International Airport is essentially constant during May, remaining within 0.1 kWh of 6.0 kWh throughout.

The highest average daily incident shortwave solar energy during May is 6.1 kWh on May 22.

For the purposes of this report, the geographical coordinates of Osaka International Airport are 34.786 deg latitude, 135.438 deg longitude, and 16 ft elevation.

The topography within 2 miles of Osaka International Airport contains only modest variations in elevation, with a maximum elevation change of 341 feet and an average elevation above sea level of 57 feet. Within 10 miles contains only modest variations in elevation (3,133 feet). Within 50 miles contains large variations in elevation (6,276 feet).

The area within 2 miles of Osaka International Airport is covered by cropland (42%), grassland (19%), artificial surfaces (16%), and trees (14%), within 10 miles by trees (28%) and grassland (27%), and within 50 miles by trees (55%) and water (22%).