May Weather in Jieshan China

Daily high temperatures increase by 4°F, from 80°F to 85°F, rarely falling below 70°F or exceeding 93°F.

Daily low temperatures increase by 6°F, from 65°F to 71°F, rarely falling below 58°F or exceeding 76°F.

For reference, on July 14, the hottest day of the year, temperatures in Jieshan typically range from 78°F to 94°F, while on January 27, the coldest day of the year, they range from 46°F to 62°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.

Houston, United States (8,021 miles away); Fernandina Beach, United States (8,357 miles); and Zarzis, Tunisia (6,204 miles) are the far-away foreign places with temperatures most similar to Jieshan (view comparison).

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The month of May in Jieshan experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 61% to 74%.

The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 39% of the time.

For reference, on June 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on December 26, 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 Jieshan, the chance of a wet day over the course of May is increasing, starting the month at 42% and ending it at 46%.

For reference, the year's highest daily chance of a wet day is 46% on May 30, and its lowest chance is 8% on October 24.

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 Jieshan is rapidly increasing, starting the month at 5.5 inches, when it rarely exceeds 8.9 inches or falls below 2.9 inches, and ending the month at 6.9 inches, when it rarely exceeds 10.9 inches or falls below 3.1 inches.

Over the course of May in Jieshan, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 29 minutes, implying an average daily increase of 59 seconds, and weekly increase of 6 minutes, 51 seconds.

The shortest day of the month is May 1, with 13 hours, 7 minutes of daylight and the longest day is May 31, with 13 hours, 36 minutes of daylight.

The latest sunrise of the month in Jieshan is 5:28 AM on May 1 and the earliest sunrise is 14 minutes earlier at 5:14 AM on May 31.

The earliest sunset is 6:35 PM on May 1 and the latest sunset is 15 minutes later at 6:50 PM on May 31.

Daylight saving time is not observed in Jieshan during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:14 AM and sets 13 hours, 43 minutes later, at 6:57 PM, while on December 21, the shortest day of the year, it rises at 6:45 AM and sets 10 hours, 34 minutes later, at 5:19 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 Jieshan is very rapidly increasing during May, rising from 45% to 77% over the course of the month.

For reference, on July 11, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 21, 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 Jieshan is essentially constant during May, remaining within 0.2 miles per hour of 8.9 miles per hour throughout.

For reference, on October 19, the windiest day of the year, the daily average wind speed is 13.0 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 8.3 miles per hour.

The lowest daily average wind speed during May is 8.7 miles per hour on May 11.

The wind direction in Jieshan during May is predominantly out of the east from May 1 to May 9 and the south from May 9 to May 31.

Jieshan 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 Jieshan is increasing during May, rising by 6°F, from 70°F to 75°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).

While it does not do so every year, freezing temperatures are seen in Jieshan over some winters. The day least likely to be in the growing season is January 16, with a 80% chance.

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 Jieshan are rapidly increasing during May, increasing by 719°F, from 1,144°F to 1,863°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 Jieshan is essentially constant during May, remaining within 0.1 kWh of 5.4 kWh throughout.

For the purposes of this report, the geographical coordinates of Jieshan are 25.223 deg latitude, 118.854 deg longitude, and 102 ft elevation.

The topography within 2 miles of Jieshan contains very significant variations in elevation, with a maximum elevation change of 1,585 feet and an average elevation above sea level of 258 feet. Within 10 miles contains very significant variations in elevation (2,562 feet). Within 50 miles contains large variations in elevation (5,994 feet).

The area within 2 miles of Jieshan is covered by cropland (35%), trees (31%), artificial surfaces (19%), and shrubs (12%), within 10 miles by trees (34%) and cropland (20%), and within 50 miles by water (35%) and trees (34%).