Incheon Climate by Month
Incheon, South Korea
Warm summers and freezing winters, with most rain from May to September.
Warm summers and freezing winters, with most rain from May to September: that's Incheon's climate in short. Expect highs of 85°F (30°C) in August and 34°F (1°C) in January, with the coldest nights (January) near 19°F (-7°C). It gets 45 in (1141 mm) of rain a year, 75% of it from May to September.
- Warmest month
- 85°F(30°C)
- Average high, August
- Coldest nights
- 19°F(-7°C)
- Average low, January
- Rain per year
- 45 in(1141 mm)
- Wettest: July
- Humidity
- 69%
- Sunniest: May
Best and worst months in Incheon
Best for weatherThe most comfortable weather comes in May, with highs around 73°F (23°C) and about 3.3 in (84 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 34°F (1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Incheon weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 34°F(1°C) | 19°F(-7°C) | 0.8 in(21 mm) | 61% | 2.4 |
| FebFebruary | 40°F(4°C) | 24°F(-4°C) | 1.1 in(29 mm) | 65% | 3.2 |
| MarMarch | 51°F(10°C) | 34°F(1°C) | 1.7 in(44 mm) | 66% | 4.2 |
| AprApril | 64°F(18°C) | 44°F(7°C) | 2.7 in(69 mm) | 56% | 5.0 |
| MayMayBest | 73°F(23°C) | 55°F(13°C) | 3.3 in(84 mm) | 64% | 5.5 |
| JunJune | 80°F(27°C) | 65°F(18°C) | 4.9 in(124 mm) | 70% | 5.3 |
| JulJuly | 84°F(29°C) | 72°F(22°C) | 11 in(282 mm) | 80% | 4.3 |
| AugAugust | 85°F(30°C) | 72°F(22°C) | 9.4 in(239 mm) | 77% | 4.3 |
| SepSeptember | 78°F(26°C) | 62°F(17°C) | 5.0 in(128 mm) | 72% | 4.2 |
| OctOctober | 67°F(19°C) | 48°F(9°C) | 2.0 in(52 mm) | 68% | 3.6 |
| NovNovember | 52°F(11°C) | 35°F(2°C) | 1.9 in(47 mm) | 73% | 2.5 |
| DecDecember | 37°F(3°C) | 22°F(-5°C) | 0.9 in(22 mm) | 72% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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