Fall Weather in Namp’o North Korea

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average fall 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.

Average Hourly Temperature in the Fall in Namp’o

frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering

The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Stickney, Illinois, United States (6,500 miles away) is the far-away foreign place with temperatures most similar to Namp’o (view comparison).

Compare Namp’o to another city:

Clouds

The fall in Namp’o experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 41% to 35%. The lowest chance of overcast or mostly cloudy conditions is 29% on October 18.

The clearest day of the fall is October 18, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on July 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on October 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.

Cloud Cover Categories in the Fall in Namp’o

0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Namp’o, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 31% and ending it at 12%.

For reference, the year's highest daily chance of a wet day is 51% on July 25, and its lowest chance is 3% on January 28.

Probability of Precipitation in the Fall in Namp’o

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 fall in Namp’o is very rapidly decreasing, starting the season at 4.9 inches, when it rarely exceeds 9.5 inches or falls below 1.2 inches, and ending the season at 0.7 inches, when it rarely exceeds 1.6 inches or falls below 0.1 inches.

Average Monthly Rainfall in the Fall in Namp’o

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Sun

Over the course of the fall in Namp’o, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 20 minutes, implying an average daily decrease of 2 minutes, 14 seconds, and weekly decrease of 15 minutes, 35 seconds.

The shortest day of the fall is November 30, with 9 hours, 41 minutes of daylight and the longest day is September 1, with 13 hours, 1 minute of daylight.

Hours of Daylight and Twilight in the Fall in Namp’o

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the fall in Namp’o is 6:07 AM on September 1 and the latest sunrise is 1 hour, 29 minutes later at 7:36 AM on November 30.

The latest sunset is 7:08 PM on September 1 and the earliest sunset is 1 hour, 51 minutes earlier at 5:17 PM on November 30.

Daylight saving time is not observed in Namp’o during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:13 AM and sets 14 hours, 53 minutes later, at 8:06 PM, while on December 21, the shortest day of the year, it rises at 7:52 AM and sets 9 hours, 27 minutes later, at 5:20 PM.

Sunrise & Sunset with Twilight in the Fall in Namp’o

The solar day in the fall. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in the Fall in Namp’o

northeastsouthwest

Solar elevation and azimuth in the the fall of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon

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

Humidity

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 Namp’o is very rapidly decreasing during the fall, falling from 54% to 0% over the course of the season.

For reference, on August 2, 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.

Humidity Comfort Levels in the Fall in Namp’o

dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable

The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Namp’o is rapidly increasing during the fall, increasing from 7.2 miles per hour to 10.5 miles per hour over the course of the season.

For reference, on December 15, the windiest day of the year, the daily average wind speed is 10.8 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 7.0 miles per hour.

Average Wind Speed in the Fall in Namp’o

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Namp’o during the fall is predominantly out of the east from September 1 to September 6 and the north from September 6 to November 30.

Wind Direction in the Fall in Namp’o

northeastsouthwest

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Namp’o 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 Namp’o is very rapidly decreasing during the fall, falling by 21°F, from 73°F to 52°F, over the course of the season.

Average Water Temperature in the Fall in Namp’o

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Growing Season

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 Namp’o typically lasts for 7.5 months (229 days), from around March 26 to around November 9, rarely starting before March 10 or after April 11, and rarely ending before October 25 or after November 25.

During the fall in Namp’o, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 4% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Fall in Namp’o

frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering

The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is 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 Namp’o are rapidly increasing during the fall, increasing by 801°F, from 2,824°F to 3,625°F, over the course of the season.

Growing Degree Days in the Fall in Namp’o

The average growing degree days accumulated over the course of the fall, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 Namp’o is very rapidly decreasing during the fall, falling by 2.9 kWh, from 5.1 kWh to 2.3 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Fall in Namp’o