Summer Weather in Tonghae South Korea

Daily high temperatures increase by 5°F, from 73°F to 78°F, rarely falling below 64°F or exceeding 91°F. The highest daily average high temperature is 83°F on August 4.

Daily low temperatures increase by 7°F, from 59°F to 66°F, rarely falling below 53°F or exceeding 78°F. The highest daily average low temperature is 72°F on August 2.

For reference, on August 4, the hottest day of the year, temperatures in Tonghae typically range from 72°F to 83°F, while on January 19, the coldest day of the year, they range from 25°F to 40°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.

Borough of Queens, United States (6,848 miles away) is the far-away foreign place with temperatures most similar to Tonghae (view comparison).

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The summer in Tonghae experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the season. The highest chance of overcast or mostly cloudy conditions is 57% on July 13.

The clearest day of the summer is June 1, with clear, mostly clear, or partly cloudy conditions 56% of the time.

For reference, on July 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 57%, while on December 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Tonghae, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 21% and ending it at 43%.

For reference, the year's highest daily chance of a wet day is 48% on July 13, and its lowest chance is 10% on December 27.

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 Tonghae is very rapidly increasing, starting the season at 3.4 inches, when it rarely exceeds 5.9 inches or falls below 1.2 inches, and ending the season at 8.7 inches, when it rarely exceeds 15.7 inches or falls below 3.4 inches.

The highest average 31-day accumulation is 9.1 inches on July 14.

Over the course of the summer in Tonghae, 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, 34 minutes, implying an average daily decrease of 1 minute, 2 seconds, and weekly decrease of 7 minutes, 15 seconds.

The shortest day of the summer is August 31, with 13 hours, 1 minute of daylight and the longest day is June 21, with 14 hours, 46 minutes of daylight.

The earliest sunrise of the summer in Tonghae is 5:01 AM on June 13 and the latest sunrise is 51 minutes later at 5:53 AM on August 31.

The latest sunset is 7:48 PM on June 28 and the earliest sunset is 55 minutes earlier at 6:54 PM on August 31.

Daylight saving time is not observed in Tonghae during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:02 AM and sets 14 hours, 46 minutes later, at 7:47 PM, while on December 21, the shortest day of the year, it rises at 7:34 AM and sets 9 hours, 34 minutes later, at 5:08 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 Tonghae is very rapidly increasing during the summer, rising from 4% to 60% over the course of the season.

The highest chance of a muggy day during the summer is 93% on August 3.

For reference, on August 3, the muggiest day of the year, there are muggy conditions 93% of the time, while on January 1, 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 Tonghae is essentially constant during the summer, remaining within 0.5 miles per hour of 7.9 miles per hour throughout.

For reference, on December 28, the windiest day of the year, the daily average wind speed is 13.4 miles per hour, while on June 15, the calmest day of the year, the daily average wind speed is 7.4 miles per hour.

The lowest daily average wind speed during the summer is 7.4 miles per hour on June 15.

The wind direction in Tonghae during the summer is predominantly out of the west from June 1 to August 11 and the east from August 11 to August 31.

Tonghae 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 Tonghae is very rapidly increasing during the summer, rising by 12°F, from 62°F to 74°F, over the course of the season.

The highest average surface water temperature during the summer is 75°F on August 14.

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 Tonghae typically lasts for 7.6 months (234 days), from around March 25 to around November 13, rarely starting before March 7 or after April 12, and rarely ending before October 28 or after November 30.

The summer in Tonghae 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 Tonghae are very rapidly increasing during the summer, increasing by 2,041°F, from 607°F to 2,648°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 Tonghae is rapidly decreasing during the summer, falling by 1.6 kWh, from 6.7 kWh to 5.1 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Tonghae are 37.544 deg latitude, 129.107 deg longitude, and 79 ft elevation.

The topography within 2 miles of Tonghae contains very significant variations in elevation, with a maximum elevation change of 1,161 feet and an average elevation above sea level of 231 feet. Within 10 miles contains very significant variations in elevation (4,436 feet). Within 50 miles also contains extreme variations in elevation (5,157 feet).

The area within 2 miles of Tonghae is covered by sparse vegetation (40%), water (26%), and trees (18%), within 10 miles by water (50%) and trees (30%), and within 50 miles by water (56%) and trees (32%).