Climate and Average Weather Year Round at Busan / Gimhae International Airport South Korea

At Busan / Gimhae International Airport, the summers are warm, muggy, wet, and mostly cloudy and the winters are very cold, windy, and mostly clear. Over the course of the year, the temperature typically varies from 27°F to 86°F and is rarely below 19°F or above 92°F.

Based on the tourism score, the best times of year to visit Busan / Gimhae International Airport for warm-weather activities are from late May to late June and from late August to early October.

The hot season lasts for 3.3 months, from June 13 to September 21, with an average daily high temperature above 78°F. The hottest month of the year at Busan / Gimhae International Airport is August, with an average high of 85°F and low of 73°F.

The cold season lasts for 3.0 months, from December 2 to March 4, with an average daily high temperature below 53°F. The coldest month of the year at Busan / Gimhae International Airport is January, with an average low of 27°F and high of 45°F.

At Busan / Gimhae International Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Busan / Gimhae International Airport begins around September 13 and lasts for 6.2 months, ending around March 21.

The clearest month of the year at Busan / Gimhae International Airport is December, during which on average the sky is clear, mostly clear, or partly cloudy 74% of the time.

The cloudier part of the year begins around March 21 and lasts for 5.8 months, ending around September 13.

The cloudiest month of the year at Busan / Gimhae International Airport is July, during which on average the sky is overcast or mostly cloudy 59% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Busan / Gimhae International Airport varies significantly throughout the year.

The wetter season lasts 3.2 months, from June 9 to September 14, with a greater than 29% chance of a given day being a wet day. The month with the most wet days at Busan / Gimhae International Airport is July, with an average of 13.8 days with at least 0.04 inches of precipitation.

The drier season lasts 8.8 months, from September 14 to June 9. The month with the fewest wet days at Busan / Gimhae International Airport is December, with an average of 2.9 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone at Busan / Gimhae International Airport is July, with an average of 13.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 49% on July 1.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Busan / Gimhae International Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Busan / Gimhae International Airport. The month with the most rain at Busan / Gimhae International Airport is July, with an average rainfall of 9.7 inches.

The month with the least rain at Busan / Gimhae International Airport is December, with an average rainfall of 1.0 inches.

The length of the day at Busan / Gimhae International Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 47 minutes of daylight; the longest day is June 21, with 14 hours, 32 minutes of daylight.

The earliest sunrise is at 5:09 AM on June 13, and the latest sunrise is 2 hours, 24 minutes later at 7:33 AM on January 7. The earliest sunset is at 5:11 PM on December 5, and the latest sunset is 2 hours, 31 minutes later at 7:42 PM on June 28.

Daylight saving time (DST) is not observed at Busan / Gimhae International Airport during 2024.

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

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.

Busan / Gimhae International Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 10 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The month with the most muggy days at Busan / Gimhae International Airport is August, with 26.8 days that are muggy or worse.

The month with the fewest muggy days at Busan / Gimhae International Airport is January, with 0.0 days that are muggy or worse.

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 Busan / Gimhae International Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from November 8 to April 21, with average wind speeds of more than 10.5 miles per hour. The windiest month of the year at Busan / Gimhae International Airport is January, with an average hourly wind speed of 12.4 miles per hour.

The calmer time of year lasts for 6.6 months, from April 21 to November 8. The calmest month of the year at Busan / Gimhae International Airport is June, with an average hourly wind speed of 8.8 miles per hour.

The predominant average hourly wind direction at Busan / Gimhae International Airport varies throughout the year.

The wind is most often from the west for 1.8 months, from March 31 to May 26, with a peak percentage of 34% on May 7. The wind is most often from the east for 4.3 weeks, from May 26 to June 25 and for 1.5 months, from August 3 to September 17, with a peak percentage of 40% on September 13. The wind is most often from the north for 6.5 months, from September 17 to March 31, with a peak percentage of 55% on January 1.

Busan / Gimhae 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 water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.3 months, from July 17 to September 27, with an average temperature above 74°F. The month of the year at Busan / Gimhae International Airport with the warmest water is August, with an average temperature of 78°F.

The time of year with cooler water lasts for 4.4 months, from December 26 to May 5, with an average temperature below 60°F. The month of the year at Busan / Gimhae International Airport with the coolest water is February, with an average temperature of 55°F.

To characterize how pleasant the weather is at Busan / Gimhae International Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Busan / Gimhae International Airport for general outdoor tourist activities are from late May to late June and from late August to early October, with a peak score in the third week of September.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Busan / Gimhae International Airport for hot-weather activities is from mid July to late August, with a peak score in the first week of August.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 Busan / Gimhae International Airport typically lasts for 8.0 months (243 days), from around March 19 to around November 18, rarely starting before March 1 or after April 7, and rarely ending before November 2 or after December 4.

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.

Based on growing degree days alone, the first spring blooms at Busan / Gimhae International Airport should appear around March 31, only rarely appearing before March 21 or after April 11.

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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.4 months, from April 15 to June 29, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year at Busan / Gimhae International Airport is May, with an average of 6.3 kWh.

The darker period of the year lasts for 3.0 months, from November 6 to February 5, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest month of the year at Busan / Gimhae International Airport is December, with an average of 2.8 kWh.

For the purposes of this report, the geographical coordinates of Busan / Gimhae International Airport are 35.180 deg latitude, 128.938 deg longitude, and 7 ft elevation.

The topography within 2 miles of Busan / Gimhae International Airport contains only modest variations in elevation, with a maximum elevation change of 299 feet and an average elevation above sea level of 9 feet. Within 10 miles contains only modest variations in elevation (2,635 feet). Within 50 miles contains large variations in elevation (4,101 feet).

The area within 2 miles of Busan / Gimhae International Airport is covered by sparse vegetation (62%) and cropland (22%), within 10 miles by sparse vegetation (35%) and trees (24%), and within 50 miles by water (51%) and trees (23%).