April is one of the warmer months of the year in Korea, with average highs near 43.2°C and lows around 18.7°C (mean 31°C). It is one of the drier months, averaging 20 mm of rainfall and 23% relative humidity across the period.
April is one of the warmer months of the year in Korea. Across 45 years of records, the warmest Aprils in Korea were 2010 and 2016 — when the month averaged 33.5°C — while the coldest was 1997 at 28.4°C. Typical April days reach 43.2°C with nights near 18.7°C. The long-term April temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 30.9°C | 30.5°C | 31.0°C | 31.2°C | 31.1°C | +0.2°C |
| Avg High | 43.4°C | 43.3°C | 43.6°C | 42.7°C | 42.7°C | -0.7°C |
| Avg Low | 18.4°C | 17.6°C | 18.4°C | 19.7°C | 19.5°C | +1.1°C |
| Avg Rain | 10 mm | 18 mm | 18 mm | 31 mm | 29 mm | +19 mm |
April temperatures in Korea have risen by about 0.3°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 15.2°C (1996) to a record high of 45.7°C (1999).
Rainfall in April is one of the drier months, averaging 20 mm, with a wettest year of 73 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Korea
April is a good time to visit Korea, with days averaging 43.2°C and nights around 18.7°C (mean 31°C, warmer than Korea's yearly average) and low rainfall. February and October are marginally more temperate, but April still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 43.3°C | 20.8°C | 32.1°C | 19 mm | 24% | 2.1 m/s | 6.2 |
| 2024 | 42.7°C | 18.8°C | 30.8°C | 20 mm | 33% | 2.3 m/s | 6.1 |
| 2023 | 42.2°C | 18.3°C | 30.2°C | 68 mm | 37% | 2 m/s | 5.9 |
| 2022 | 45.0°C | 21.9°C | 33.4°C | 1 mm | 14% | 1.7 m/s | 6.8 |
| 2021 | 42.3°C | 18.9°C | 30.6°C | 5 mm | 16% | 1.7 m/s | 6.5 |
| 2020 | 40.7°C | 18.2°C | 29.4°C | 60 mm | 38% | 1.9 m/s | 6.5 |
| 2019 | 44.7°C | 19.7°C | 32.2°C | 12 mm | 22% | 2.1 m/s | 6.4 |
| 2018 | 42.5°C | 19.5°C | 31.0°C | 18 mm | 26% | 2.1 m/s | 6.4 |
| 2017 | 43.8°C | 19.3°C | 31.5°C | 0 mm | 15% | 2.3 m/s | 7.2 |
| 2016 | 44.7°C | 22.3°C | 33.5°C | 4 mm | 18% | 2.3 m/s | 7 |
| 2015 | 41.9°C | 18.4°C | 30.1°C | 37 mm | 37% | 2 m/s | 6.3 |
| 2014 🌧️ | 41.1°C | 18.5°C | 29.8°C | 73 mm | 34% | 2 m/s | 7.1 |
| 2013 | 41.7°C | 17.0°C | 29.4°C | 63 mm | 34% | 2 m/s | 6.8 |
| 2012 | 41.5°C | 20.6°C | 31.1°C | 23 mm | 25% | 2.2 m/s | 6.8 |
| 2011 | 39.8°C | 19.6°C | 29.7°C | 64 mm | 37% | 1.8 m/s | 6 |
| 2010 🔥 | 45.0°C | 22.0°C | 33.5°C | 13 mm | 14% | 2.3 m/s | 7.3 |
| 2009 | 44.9°C | 17.6°C | 31.3°C | 11 mm | 19% | 2.5 m/s | 7.3 |
| 2008 | 43.6°C | 17.4°C | 30.5°C | 12 mm | 26% | 2 m/s | 7.1 |
| 2007 | 42.2°C | 19.5°C | 30.9°C | 10 mm | 22% | 2 m/s | 6.7 |
| 2006 | 43.1°C | 17.7°C | 30.4°C | 11 mm | 26% | 2.2 m/s | 6.9 |
| 2005 | 41.6°C | 16.2°C | 28.9°C | 34 mm | 23% | 2.1 m/s | 6.7 |
| 2004 | 43.3°C | 20.2°C | 31.7°C | 54 mm | 32% | 2.1 m/s | 6.8 |
| 2003 | 44.3°C | 18.8°C | 31.5°C | 14 mm | 20% | 2.2 m/s | 6.9 |
| 2002 | 44.1°C | 18.0°C | 31.1°C | 3 mm | 19% | 2.1 m/s | 7 |
| 2001 | 44.5°C | 18.5°C | 31.5°C | 26 mm | 25% | 2.1 m/s | 6.7 |
| 2000 | 44.5°C | 20.5°C | 32.5°C | 1 mm | 13% | 2.3 m/s | 7.4 |
| 1999 | 45.7°C | 19.3°C | 32.5°C | 0 mm | 9% | 2.4 m/s | 7.3 |
| 1998 | 42.9°C | 16.3°C | 29.6°C | 21 mm | 29% | 1.9 m/s | 6.6 |
| 1997 ❄️ | 40.9°C | 15.8°C | 28.4°C | 63 mm | 34% | 1.9 m/s | 6.4 |
| 1996 | 43.7°C | 15.2°C | 29.4°C | 25 mm | 23% | 2.1 m/s | 6.3 |
| 1995 | 43.9°C | 17.5°C | 30.7°C | 9 mm | 20% | 2 m/s | 7 |
| 1994 | 41.9°C | 19.5°C | 30.7°C | 12 mm | 23% | 2 m/s | 6.6 |
| 1993 | 44.1°C | 17.9°C | 31.0°C | 13 mm | 20% | 2.3 m/s | 6.8 |
| 1992 | 42.8°C | 18.2°C | 30.5°C | 17 mm | 22% | 2.2 m/s | 7 |
| 1991 | 43.3°C | 20.0°C | 31.6°C | 0 mm | 18% | 2.6 m/s | 7.2 |
| 1990 | 44.2°C | 16.4°C | 30.3°C | 16 mm | 19% | 2.6 m/s | 7.4 |
| 1989 | 43.8°C | 16.1°C | 29.9°C | 0 mm | 12% | 2.6 m/s | 7.4 |
| 1988 | 42.8°C | 18.4°C | 30.6°C | 16 mm | 21% | 2.1 m/s | 6.5 |
| 1987 | 42.9°C | 20.2°C | 31.6°C | 1 mm | 17% | 2.6 m/s | 7.3 |
| 1986 | 43.4°C | 17.1°C | 30.2°C | 26 mm | 19% | 2.4 m/s | 7.6 |
| 1985 | 43.9°C | 20.1°C | 32.0°C | 7 mm | 20% | 2.6 m/s | 7.5 |
| 1984 | 43.5°C | 18.8°C | 31.2°C | 16 mm | 22% | 2.1 m/s | 7.1 |
| 1983 | 44.2°C | 20.0°C | 32.1°C | 6 mm | 24% | 2.8 m/s | — |
| 1982 | 41.8°C | 18.8°C | 30.3°C | 9 mm | 26% | 2.4 m/s | — |
| 1981 | 43.9°C | 16.2°C | 30.0°C | 9 mm | 18% | 2.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 43.2°C with lows near 18.7°C (mean 31°C), based on 45 years of NASA POWER data.
April averages 20 mm of rainfall in Korea, one of the drier months. The wettest on record was 73 mm in 2014.
The hottest April reached 45.7°C in 1999. The coldest dipped to 15.2°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.3°C. Daytime highs moved from 43.5°C to 43.1°C and overnight lows from 18.8°C to 19.7°C over the same span.
April is one of the warmer months of the year in Korea and one of the drier months, so plan for around 43.2°C daytime highs and 18.7°C at night.
Not quite — April is the 10th coolest month in Korea, averaging 31°C.
For April in Korea, pack light, breathable clothing and sun protection, with typical highs of 43.2°C and lows of 18.7°C.
Relative humidity in April averages 23% — relatively dry.
Average wind speed in April is 2.2 m/s. The windiest April on record averaged 2.8 m/s (1983).
The wettest April on record was 2014 with 73 mm. On average, April sees 20 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
