May Weather in Shimoda Japan

Daily high temperatures increase by 4°F, from 67°F to 71°F, rarely falling below 62°F or exceeding 75°F.

Daily low temperatures increase by 5°F, from 60°F to 66°F, rarely falling below 55°F or exceeding 69°F.

For reference, on August 10, the hottest day of the year, temperatures in Shimoda typically range from 77°F to 83°F, while on January 28, the coldest day of the year, they range from 44°F to 53°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.

Peschici, Italy (6,036 miles away) is the far-away foreign place with temperatures most similar to Shimoda (view comparison).

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The month of May in Shimoda experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 58% to 64%.

The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 42% of the time.

For reference, on June 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on December 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Shimoda, the chance of a wet day over the course of May is essentially constant, remaining around 36% throughout.

For reference, the year's highest daily chance of a wet day is 50% on June 23, and its lowest chance is 15% on December 29.

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 in Shimoda is increasing, starting the month at 6.4 inches, when it rarely exceeds 10.1 inches or falls below 3.4 inches, and ending the month at 7.2 inches, when it rarely exceeds 11.4 inches or falls below 4.1 inches.

Over the course of May in Shimoda, 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, 27 seconds, and weekly increase of 10 minutes, 12 seconds.

The shortest day of the month is May 1, with 13 hours, 35 minutes of daylight and the longest day is May 31, with 14 hours, 19 minutes of daylight.

The latest sunrise of the month in Shimoda is 4:53 AM on May 1 and the earliest sunrise is 21 minutes earlier at 4:32 AM on May 31.

The earliest sunset is 6:29 PM on May 1 and the latest sunset is 22 minutes later at 6:51 PM on May 31.

Daylight saving time is not observed in Shimoda during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:31 AM and sets 14 hours, 29 minutes later, at 7:00 PM, while on December 21, the shortest day of the year, it rises at 6:47 AM and sets 9 hours, 50 minutes later, at 4:37 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 in Shimoda is very rapidly increasing during May, rising from 4% to 29% over the course of the month.

For reference, on August 15, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 7, 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 Shimoda is decreasing during May, decreasing from 12.2 miles per hour to 10.6 miles per hour over the course of the month.

For reference, on January 17, the windiest day of the year, the daily average wind speed is 15.3 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 10.0 miles per hour.

The wind direction in Shimoda during May is predominantly out of the west from May 1 to May 16 and the east from May 16 to May 31.

Shimoda 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 Shimoda is increasing during May, rising by 4°F, from 65°F to 69°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).

Temperatures in Shimoda 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.

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 Shimoda are rapidly increasing during May, increasing by 487°F, from 564°F to 1,051°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 in Shimoda is essentially constant during May, remaining within 0.1 kWh of 5.8 kWh throughout.

The highest average daily incident shortwave solar energy during May is 5.9 kWh on May 23.

For the purposes of this report, the geographical coordinates of Shimoda are 34.667 deg latitude, 138.950 deg longitude, and 0 ft elevation.

The topography within 2 miles of Shimoda contains very significant variations in elevation, with a maximum elevation change of 951 feet and an average elevation above sea level of 133 feet. Within 10 miles contains very significant variations in elevation (3,251 feet). Within 50 miles contains large variations in elevation (12,329 feet).

The area within 2 miles of Shimoda is covered by water (61%) and trees (32%), within 10 miles by water (66%) and trees (32%), and within 50 miles by water (84%) and trees (13%).