Seoul monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Seoul

Seoul average temperature chart (Celsius) Seoul average temperature chart (Fahrenheit)
Average monthly temperatures in Seoul (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.9 3.2 9.3 17.1 22.7 26.1 28.3 29.2 25.3 19.5 11.1 3.6
°F 33.6 37.7 48.7 62.8 72.9 79 82.9 84.6 77.6 67.2 51.9 38.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Seoul monthly rainfall chart (mm) Seoul monthly rainfall chart (inches)
Average monthly rainfall in Seoul (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 22 26 45 102 90 133 358 289 161 49 48 21
inches 0.9 1 1.8 4 3.6 5.2 14.1 11.4 6.3 1.9 1.9 0.8
Rainy days 7 6 7 8 8 10 16 13 9 6 10 7

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Seoul

Seoul average daily sunshine chart
Average daily sunshine Seoul
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6 6.8 7.6 8 8.6 7.9 5.9 6.6 7.2 7.3 5.8 5.6

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Seoul average minimum / maximum temperatures (Celsius) Seoul average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Seoul (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.7 -5.4 -0.1 6.5 12.3 17.1 21.4 21.8 16.1 9 2.1 -4.7
Max °C 1.1 3.4 9.5 17.4 23 26.4 28.5 29.4 25.6 19.8 11.3 3.9
Min °F 18.1 22.3 31.8 43.6 54.1 62.7 70.4 71.2 60.9 48.2 35.8 23.6
Max °F 26.1 30.2 40.5 53.4 63.7 71.1 76.8 78.1 69.4 57.9 44.1 31.3

Sea temperature

The graph below shows the average sea temperature.

Seoul average sea temperature chart (Celsius) Seoul average sea temperature chart (Fahrenheit)
Average sea temperature around Seoul in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.8 5.3 5.5 8.1 12.5 18.3 22.7 25.3 23.2 19.3 14.5 10.1
°F 44.2 41.5 41.9 46.6 54.6 65 72.8 77.6 73.8 66.8 58 50.1

Wind speed

The graph below shows the average wind speed.

Seoul average winspeed by month (km/h) Seoul average winspeed by month (mph)
Average wind speed in Seoul (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 9 9 10 10 8 7 7 7 6 7 8 8
mph 5 6 6 6 5 5 5 4 4 4 5 5

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Seoul relative humidity averages
Average relative humidity in Seoul
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 65% 65% 64% 67% 74% 82% 80% 75% 70% 68% 68%
Seoul

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Seoul weather stats

Seoul weather statistics
Hottest month: August 29.2°C 84.6°F
Driest month: December 21mm 0.8ins
Sunniest month: October 7.3hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: July 358mm 14.1ins
Warmest sea: August 25.3°C 77.5°F
Map showing location of Seoul (37.56826, 126.97783) Seoul map pin © Google

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