South Korea · 37.57°N 126.98°E · 30-year monthly averages, judged against the Warm preset (highs 19–28 °C66–82 °F, dry or showers)
The best time to visit Seoul is May and October, with highs of 19–22 °C66–72 °F and nights of 8–12 °C46–54 °F, and rainfall of 56–96 mm2.2–3.8 in a month.
The rainy season is June to September; July to August is a true monsoon, with 304–312 mm12–12 in a month and a peak in July (312 mm12 in). August is the hottest month (highs of 29 °C84 °F) and January the coldest (1 °C34 °F); nights are below freezing from December to March.
The figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 37.57, 126.98. This is a climate guide, not a forecast.
Pick the weather you like. Every month is then judged against it: temperature above the month names, rain below.
Good time to go for a Warm holiday: May and October.
Open Seoul on the interactive map ↗ the same verdicts for any place on Earth, in any month
Reading the chart. Gold means good: the month fits what you picked. Any other colour shows the reason it does not. The temperature bar can be too cold or too hot; the rain bar can be too dry, too rainy or monsoon. A faded gold bar means that half fits but the other half does not. A gold month name means both halves fit.
What the verdicts mean. Temperature is the month's average daily high (the afternoon), judged against the preset's band (highs 19–28 °C66–82 °F for Warm). Rain is judged by each month's class within Seoul's own year, not by raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and at least 35 % of the wettest month. Too rainy is a rainy-season month that the preset does not allow. Monsoon is the heaviest kind of rainy season: 180 mm7.1 in or more (120 mm4.7 in near the yearly peak) in a climate where the wettest month has at least three times the rain of the driest. Every monsoon month is also a rainy-season month; the label says which kind. Full rules on the method page.
| Month | Rain | High | Low | Season | Warm verdict |
|---|---|---|---|---|---|
| January | 240.9 | 134 | -818 | dry | too cold |
| February | 240.9 | 438 | -522 | dry | too cold |
| March | 481.9 | 948 | 031 | dry | too cold |
| April | 803.1 | 1763 | 643 | showers | too cold |
| May | 963.8 | 2272 | 1253 | showers | good |
| June | 1365.4 | 2678 | 1763 | rainy | too rainy |
| July | 31212 | 2882 | 2170 | monsoon | too hot |
| August | 30412 | 2983 | 2170 | monsoon | too hot |
| September | 1526.0 | 2576 | 1660 | rainy | too rainy |
| October | 562.2 | 1965 | 846 | dry | good |
| November | 481.9 | 1151 | 235 | dry | too cold |
| December | 240.9 | 438 | -523 | dry | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | highs 19–28 °C66–82 °F, dry or showers | May and October |
| Tropical | highs 28–38 °C82–100 °F, any rain except monsoon | |
| Beach | highs 28–38 °C82–100 °F, dry or showers | |
| Cool | highs 3–19 °C37–66 °F, any rain except monsoon | February to April and November to December |
| Snow | highs below 3 °C37 °F, any rain | January |
Yes. The rainy season is June to September; July to August is a true monsoon, with 304–312 mm12–12 in a month and a peak in July (312 mm12 in). Outside the rainy season, October to March is dry.
August is the hottest month (highs of 29 °C84 °F) and January the coldest (1 °C34 °F); nights are below freezing from December to March. Annual rainfall is about 1,304 mm51 in.
The nearest destinations that fit the Warm preset in the months when Seoul does not:
The interactive map colours the whole world by how well it fits the weather you like, in any month, and shows this chart for any place you tap.