October is one of the cooler months of the year in Korea, with average highs near 28.2°C and lows around 18.3°C (mean 23.3°C). It is one of the drier months, averaging 57 mm of rainfall and 77% relative humidity across the period.
October is one of the cooler months of the year in Korea. Across 45 years of records, the warmest October in Korea was 2000 — when the month averaged 26.1°C — while the coldest was 1983 at 22°C. Typical October days reach 28.2°C with nights near 18.3°C. The long-term trend is warming, about 0.2°C per decade.
October is one of the drier months in Korea, averaging 57 mm of rainfall. The wettest October on record was 2013 with 360 mm, while the driest was 2000 at 2 mm.
Relative humidity in Korea during October averages 77%. The most humid October was 2013 at 86%, and the least humid was 2000 at 56%.
October receives about 5 kWh/m²/day of solar energy in Korea. The sunniest October was 1989 at 5.8 kWh/m²/day, and the cloudiest were 2013 and 2025 at 3.9.
Average wind speed in Korea during October is 1.4 m/s. The windiest Octobers were 2003 and 2013 at 1.9 m/s, while the calmest was 1997 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.0°C | 23.1°C | 23.4°C | 23.4°C | 23.6°C | +0.6°C |
| Avg High | 28.2°C | 27.8°C | 28.8°C | 28.2°C | 28.1°C | -0.1°C |
| Avg Low | 17.7°C | 18.4°C | 18.1°C | 18.6°C | 19.2°C | +1.5°C |
| Avg Rain | 41 mm | 59 mm | 46 mm | 74 mm | 70 mm | +29 mm |
October temperatures in Korea have risen by about 0.7°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 10.4°C (1983) to a record high of 36°C (2000).
Rainfall in October is one of the drier months, averaging 57 mm, with a wettest year of 360 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
One of the best times to visit Korea
October is one of the best times to visit Korea. Expect days averaging 28.2°C and nights around 18.3°C (mean 23.3°C) — cooler than Korea's yearly average — with moderate rainfall (57 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.8°C | 23.8°C | 19.7°C | 30.5°C | 16.4°C | 130 mm | 84% | 1.4 m/s | 3.9 |
| 2024 | 28.8°C | 24.5°C | 20.3°C | 30.5°C | 16.3°C | 13 mm | 84% | 1.4 m/s | 4.2 |
| 2023 | 27.9°C | 22.8°C | 17.8°C | 30.0°C | 13.9°C | 40 mm | 76% | 1.5 m/s | 4.8 |
| 2022 | 27.0°C | 22.7°C | 18.3°C | 29.2°C | 12.7°C | 112 mm | 84% | 1.5 m/s | 4.7 |
| 2021 | 28.1°C | 23.4°C | 18.6°C | 30.4°C | 11.5°C | 36 mm | 82% | 1.3 m/s | 4.9 |
| 2020 | 28.7°C | 24.4°C | 20.2°C | 30.3°C | 15.0°C | 87 mm | 80% | 1.3 m/s | 4.5 |
| 2019 | 27.1°C | 22.9°C | 18.6°C | 28.7°C | 16.3°C | 34 mm | 85% | 1.4 m/s | 4.1 |
| 2018 | 29.6°C | 23.9°C | 18.3°C | 31.0°C | 14.9°C | 4 mm | 69% | 1.3 m/s | 5.3 |
| 2017 | 29.2°C | 24.7°C | 20.2°C | 31.3°C | 16.3°C | 28 mm | 77% | 1.2 m/s | 4.8 |
| 2016 | 27.9°C | 22.8°C | 17.7°C | 29.5°C | 13.4°C | 56 mm | 77% | 1.3 m/s | 5.1 |
| 2015 | 29.2°C | 24.0°C | 18.7°C | 30.8°C | 16.2°C | 33 mm | 72% | 1.1 m/s | 5.1 |
| 2014 | 27.6°C | 23.1°C | 18.7°C | 29.9°C | 15.5°C | 146 mm | 79% | 1.5 m/s | 4.7 |
| 2013 🌧️ | 27.0°C | 23.3°C | 19.6°C | 29.1°C | 15.3°C | 360 mm | 86% | 1.9 m/s | 3.9 |
| 2012 | 27.6°C | 22.3°C | 17.0°C | 30.2°C | 11.2°C | 20 mm | 74% | 1.2 m/s | 5.2 |
| 2011 | 28.2°C | 23.1°C | 18.0°C | 30.0°C | 14.1°C | 5 mm | 76% | 1.2 m/s | 5.2 |
| 2010 | 28.3°C | 23.6°C | 19.0°C | 29.9°C | 13.3°C | 52 mm | 81% | 1.5 m/s | 4.6 |
| 2009 | 29.9°C | 23.5°C | 17.1°C | 31.8°C | 12.4°C | 67 mm | 65% | 1.6 m/s | 5.1 |
| 2008 | 28.5°C | 23.2°C | 17.9°C | 30.5°C | 13.7°C | 7 mm | 76% | 1.2 m/s | 5.2 |
| 2007 | 27.6°C | 22.4°C | 17.1°C | 29.2°C | 14.2°C | 18 mm | 76% | 1.3 m/s | 5.2 |
| 2006 | 29.1°C | 23.9°C | 18.6°C | 31.3°C | 15.7°C | 34 mm | 75% | 1.1 m/s | 5.3 |
| 2005 | 27.8°C | 23.1°C | 18.4°C | 30.1°C | 13.3°C | 73 mm | 82% | 1.5 m/s | 4.7 |
| 2004 | 27.4°C | 22.3°C | 17.2°C | 29.5°C | 13.7°C | 38 mm | 73% | 1.3 m/s | 5.2 |
| 2003 | 27.5°C | 23.1°C | 18.7°C | 29.8°C | 13.9°C | 124 mm | 84% | 1.9 m/s | 4.2 |
| 2002 | 28.4°C | 23.1°C | 17.8°C | 30.1°C | 13.1°C | 30 mm | 73% | 1.1 m/s | 5.2 |
| 2001 | 28.1°C | 23.5°C | 18.9°C | 30.1°C | 14.2°C | 68 mm | 82% | 1.5 m/s | 4.7 |
| 2000 🔥 | 33.3°C | 26.1°C | 18.8°C | 36.0°C | 15.0°C | 2 mm | 56% | 1.4 m/s | 5.5 |
| 1999 | 27.5°C | 23.1°C | 18.7°C | 29.4°C | 13.0°C | 77 mm | 84% | 1.8 m/s | 5 |
| 1998 | 28.4°C | 24.4°C | 20.4°C | 30.5°C | 14.0°C | 55 mm | 85% | 1.6 m/s | 4.8 |
| 1997 | 27.4°C | 22.7°C | 18.0°C | 28.7°C | 13.7°C | 93 mm | 78% | 1 m/s | 4.9 |
| 1996 | 27.5°C | 22.4°C | 17.4°C | 29.9°C | 14.7°C | 57 mm | 78% | 1.5 m/s | 5.3 |
| 1995 | 27.8°C | 23.0°C | 18.3°C | 30.4°C | 11.9°C | 25 mm | 78% | 1.4 m/s | 5.1 |
| 1994 | 28.0°C | 23.3°C | 18.7°C | 29.8°C | 15.1°C | 60 mm | 78% | 1.3 m/s | 5.1 |
| 1993 | 28.2°C | 23.6°C | 19.0°C | 30.3°C | 13.6°C | 40 mm | 77% | 1.2 m/s | 5.4 |
| 1992 | 28.1°C | 22.9°C | 17.8°C | 30.5°C | 13.2°C | 25 mm | 77% | 1.6 m/s | 5.3 |
| 1991 | 27.7°C | 22.3°C | 16.9°C | 29.4°C | 13.4°C | 21 mm | 74% | 1.3 m/s | 5.4 |
| 1990 | 27.5°C | 23.1°C | 18.7°C | 29.3°C | 13.6°C | 139 mm | 81% | 1.6 m/s | 5.1 |
| 1989 | 29.2°C | 23.6°C | 17.9°C | 31.2°C | 13.5°C | 7 mm | 67% | 1.3 m/s | 5.8 |
| 1988 | 28.7°C | 22.9°C | 17.1°C | 30.2°C | 13.7°C | 10 mm | 68% | 1.5 m/s | 5.4 |
| 1987 | 28.0°C | 23.0°C | 18.0°C | 31.3°C | 12.6°C | 85 mm | 77% | 1.2 m/s | 5.1 |
| 1986 | 29.7°C | 23.7°C | 17.6°C | 32.0°C | 12.4°C | 27 mm | 65% | 1.4 m/s | 5.6 |
| 1985 | 27.0°C | 22.2°C | 17.5°C | 29.5°C | 11.1°C | 73 mm | 81% | 1.7 m/s | 5.2 |
| 1984 | 28.4°C | 23.3°C | 18.2°C | 29.7°C | 13.0°C | 15 mm | 73% | 1.6 m/s | 4.7 |
| 1983 ❄️ | 26.8°C | 22.0°C | 17.2°C | 29.9°C | 10.4°C | 60 mm | 80% | 1.5 m/s | — |
| 1982 | 28.2°C | 23.4°C | 18.6°C | 29.8°C | 15.7°C | 78 mm | 75% | 1.1 m/s | — |
| 1981 | 28.1°C | 22.6°C | 17.2°C | 29.6°C | 14.4°C | 10 mm | 72% | 1.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 28.2°C with lows near 18.3°C (mean 23.3°C), based on 45 years of NASA POWER data.
October averages 57 mm of rainfall in Korea, one of the drier months. The wettest on record was 360 mm in 2013.
The hottest October reached 36°C in 2000. The coldest dipped to 10.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.7°C. Daytime highs moved from 27.7°C to 27.9°C and overnight lows from 17.7°C to 18.9°C over the same span.
October is one of the cooler months of the year in Korea and one of the drier months, so plan for around 28.2°C daytime highs and 18.3°C at night.
Not quite — October is the 5th coolest month in Korea, averaging 23.3°C.
For October in Korea, pack light layers you can adjust through the day, with typical highs of 28.2°C and lows of 18.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 77% — quite humid.
Average wind speed in October is 1.4 m/s. The windiest October on record averaged 1.9 m/s (2003).
The wettest October on record was 2013 with 360 mm. On average, October sees 57 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Korea behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
