April is one of the warmer months of the year in Korea, with average highs near 39.8°C and lows around 22.9°C (mean 31.4°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 April in Korea was 2016 — when the month averaged 33.9°C — while the coldest was 1997 at 28.4°C. Typical April days reach 39.8°C with nights near 22.9°C. The long-term April temperature trend is broadly flat.
April is one of the drier months in Korea, averaging 20 mm of rainfall. The wettest April on record was 2014 with 73 mm, while the driest were 1989, 1999 and 2017 at 0 mm.
Relative humidity in Korea during April averages 23%. The most humid April was 2020 at 38%, and the least humid was 1999 at 9%.
April receives about 6.8 kWh/m²/day of solar energy in Korea. The sunniest April was 1986 at 7.6 kWh/m²/day, and the cloudiest was 2023 at 5.9.
Average wind speed in Korea during April is 2.2 m/s. The windiest April was 1983 at 2.8 m/s, while the calmest were 2021 and 2022 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 31.7°C | 31.1°C | 31.4°C | 31.5°C | 31.0°C | -0.7°C |
| Avg High | 40.4°C | 39.8°C | 40.0°C | 39.7°C | 39.0°C | -1.4°C |
| Avg Low | 23.0°C | 22.5°C | 22.8°C | 23.3°C | 23.0°C | 0°C |
| Avg Rain | 10 mm | 18 mm | 18 mm | 31 mm | 29 mm | +19 mm |
April temperatures in Korea have stayed relatively stable across the record.
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 0.1°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 39.8°C and nights around 22.9°C (mean 31.4°C, warmer than Korea's yearly average) and low rainfall. February and November are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 39.8°C | 31.5°C | 23.2°C | 43.3°C | 20.8°C | 19 mm | 24% | 2.1 m/s | 6.2 |
| 2024 | 38.9°C | 31.1°C | 23.3°C | 42.7°C | 18.8°C | 20 mm | 33% | 2.3 m/s | 6.1 |
| 2023 | 36.4°C | 29.1°C | 21.8°C | 42.2°C | 18.3°C | 68 mm | 37% | 2 m/s | 5.9 |
| 2022 | 42.4°C | 33.8°C | 25.3°C | 45.0°C | 21.9°C | 1 mm | 14% | 1.7 m/s | 6.8 |
| 2021 | 39.6°C | 31.2°C | 22.9°C | 42.3°C | 18.9°C | 5 mm | 16% | 1.7 m/s | 6.5 |
| 2020 | 37.1°C | 29.3°C | 21.5°C | 40.7°C | 18.2°C | 60 mm | 38% | 1.9 m/s | 6.5 |
| 2019 | 40.6°C | 32.1°C | 23.6°C | 44.7°C | 19.7°C | 12 mm | 22% | 2.1 m/s | 6.4 |
| 2018 | 39.7°C | 31.5°C | 23.3°C | 42.5°C | 19.5°C | 18 mm | 26% | 2.1 m/s | 6.4 |
| 2017 | 42.1°C | 33.1°C | 24.1°C | 43.8°C | 19.3°C | 0 mm | 15% | 2.3 m/s | 7.2 |
| 2016 🔥 | 42.3°C | 33.9°C | 25.6°C | 44.7°C | 22.3°C | 4 mm | 18% | 2.3 m/s | 7 |
| 2015 | 37.3°C | 29.8°C | 22.3°C | 41.9°C | 18.4°C | 37 mm | 37% | 2 m/s | 6.3 |
| 2014 🌧️ | 38.4°C | 30.2°C | 22.0°C | 41.1°C | 18.5°C | 73 mm | 34% | 2 m/s | 7.1 |
| 2013 | 37.7°C | 30.0°C | 22.2°C | 41.7°C | 17.0°C | 63 mm | 34% | 2 m/s | 6.8 |
| 2012 | 39.8°C | 31.5°C | 23.2°C | 41.5°C | 20.6°C | 23 mm | 25% | 2.2 m/s | 6.8 |
| 2011 | 36.7°C | 29.5°C | 22.2°C | 39.8°C | 19.6°C | 64 mm | 37% | 1.8 m/s | 6 |
| 2010 | 42.2°C | 33.5°C | 24.8°C | 45.0°C | 22.0°C | 13 mm | 14% | 2.3 m/s | 7.3 |
| 2009 | 39.9°C | 31.1°C | 22.2°C | 44.9°C | 17.6°C | 11 mm | 19% | 2.5 m/s | 7.3 |
| 2008 | 39.2°C | 30.7°C | 22.2°C | 43.6°C | 17.4°C | 12 mm | 26% | 2 m/s | 7.1 |
| 2007 | 40.4°C | 32.2°C | 24.1°C | 42.2°C | 19.5°C | 10 mm | 22% | 2 m/s | 6.7 |
| 2006 | 39.6°C | 31.1°C | 22.7°C | 43.1°C | 17.7°C | 11 mm | 26% | 2.2 m/s | 6.9 |
| 2005 | 38.6°C | 30.1°C | 21.6°C | 41.6°C | 16.2°C | 34 mm | 23% | 2.1 m/s | 6.7 |
| 2004 | 39.7°C | 31.5°C | 23.3°C | 43.3°C | 20.2°C | 54 mm | 32% | 2.1 m/s | 6.8 |
| 2003 | 40.7°C | 32.2°C | 23.7°C | 44.3°C | 18.8°C | 14 mm | 20% | 2.2 m/s | 6.9 |
| 2002 | 40.9°C | 31.8°C | 22.8°C | 44.1°C | 18.0°C | 3 mm | 19% | 2.1 m/s | 7 |
| 2001 | 38.5°C | 30.4°C | 22.2°C | 44.5°C | 18.5°C | 26 mm | 25% | 2.1 m/s | 6.7 |
| 2000 | 42.2°C | 32.8°C | 23.3°C | 44.5°C | 20.5°C | 1 mm | 13% | 2.3 m/s | 7.4 |
| 1999 | 42.6°C | 32.9°C | 23.2°C | 45.7°C | 19.3°C | 0 mm | 9% | 2.4 m/s | 7.3 |
| 1998 | 39.5°C | 31.2°C | 22.9°C | 42.9°C | 16.3°C | 21 mm | 29% | 1.9 m/s | 6.6 |
| 1997 ❄️ | 36.3°C | 28.4°C | 20.5°C | 40.9°C | 15.8°C | 63 mm | 34% | 1.9 m/s | 6.4 |
| 1996 | 39.4°C | 30.8°C | 22.3°C | 43.7°C | 15.2°C | 25 mm | 23% | 2.1 m/s | 6.3 |
| 1995 | 39.8°C | 31.0°C | 22.1°C | 43.9°C | 17.5°C | 9 mm | 20% | 2 m/s | 7 |
| 1994 | 39.4°C | 31.1°C | 22.9°C | 41.9°C | 19.5°C | 12 mm | 23% | 2 m/s | 6.6 |
| 1993 | 40.1°C | 31.3°C | 22.5°C | 44.1°C | 17.9°C | 13 mm | 20% | 2.3 m/s | 6.8 |
| 1992 | 40.3°C | 31.7°C | 23.1°C | 42.8°C | 18.2°C | 17 mm | 22% | 2.2 m/s | 7 |
| 1991 | 40.1°C | 31.6°C | 23.2°C | 43.3°C | 20.0°C | 0 mm | 18% | 2.6 m/s | 7.2 |
| 1990 | 40.0°C | 31.1°C | 22.1°C | 44.2°C | 16.4°C | 16 mm | 19% | 2.6 m/s | 7.4 |
| 1989 | 40.8°C | 31.5°C | 22.1°C | 43.8°C | 16.1°C | 0 mm | 12% | 2.6 m/s | 7.4 |
| 1988 | 40.8°C | 32.3°C | 23.8°C | 42.8°C | 18.4°C | 16 mm | 21% | 2.1 m/s | 6.5 |
| 1987 | 40.6°C | 31.8°C | 22.9°C | 42.9°C | 20.2°C | 1 mm | 17% | 2.6 m/s | 7.3 |
| 1986 | 41.0°C | 32.3°C | 23.5°C | 43.4°C | 17.1°C | 26 mm | 19% | 2.4 m/s | 7.6 |
| 1985 | 40.6°C | 32.1°C | 23.7°C | 43.9°C | 20.1°C | 7 mm | 20% | 2.6 m/s | 7.5 |
| 1984 | 40.4°C | 32.2°C | 24.1°C | 43.5°C | 18.8°C | 16 mm | 22% | 2.1 m/s | 7.1 |
| 1983 | 39.4°C | 31.1°C | 22.8°C | 44.2°C | 20.0°C | 6 mm | 24% | 2.8 m/s | — |
| 1982 | 39.5°C | 31.0°C | 22.4°C | 41.8°C | 18.8°C | 9 mm | 26% | 2.4 m/s | — |
| 1981 | 40.6°C | 31.3°C | 22.0°C | 43.9°C | 16.2°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 39.8°C with lows near 22.9°C (mean 31.4°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 fallen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 23°C to 23.3°C while daytime highs eased from 40.1°C to 39.4°C, narrowing the gap between day and night.
April is one of the warmer months of the year in Korea and one of the drier months, so plan for around 39.8°C daytime highs and 22.9°C at night.
Not quite — April is the 10th coolest month in Korea, averaging 31.4°C.
For April in Korea, pack light, breathable clothing and sun protection, with typical highs of 39.8°C and lows of 22.9°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.
