Best time to visit Incheon
The best time to visit Incheon is April–May and October, judged on twenty years of weather records and the events worth going for.
Incheon, Incheon, South Korea
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 2.2 °C / 36 °F | -5.9 °C / 21 °F | 15 mm / 0.6 in | neither best nor good |
| February | 4.7 °C / 40 °F | -3.7 °C / 25 °F | 22 mm / 0.9 in | neither best nor good |
| March | 10.2 °C / 50 °F | 1.7 °C / 35 °F | 39 mm / 1.5 in | good month |
| April | 16 °C / 61 °F | 7.7 °C / 46 °F | 65 mm / 2.6 in | best month |
| May | 21.2 °C / 70 °F | 13.3 °C / 56 °F | 93 mm / 3.7 in | best month |
| June | 25.3 °C / 78 °F | 18.8 °C / 66 °F | 111 mm / 4.4 in | good month |
| July | 27.9 °C / 82 °F | 23.1 °C / 74 °F | 307 mm / 12.1 in | neither best nor good |
| August | 29.3 °C / 85 °F | 23.9 °C / 75 °F | 226 mm / 8.9 in | neither best nor good |
| September | 25.8 °C / 78 °F | 18.8 °C / 66 °F | 126 mm / 4.9 in | good month |
| October | 20 °C / 68 °F | 11.5 °C / 53 °F | 58 mm / 2.3 in | best month |
| November | 12.3 °C / 54 °F | 4.2 °C / 40 °F | 47 mm / 1.8 in | good month |
| December | 4 °C / 39 °F | -3.7 °C / 25 °F | 25 mm / 1 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: good
- AApril: best
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: good
- DDecember: neither
- Best
- April–May, October
- Good
- March, June, September, November
Incheon is best for exploring in April, May and October, when temperatures are mild, skies are mostly clear and rain stays light; March, June, September and November are good shoulder months with a bit more chill, cloud or rain. December through February turn too cold for comfortable walking, and July-August bring a hot, humid monsoon that makes exploring unpleasant.
Why these months
March · good
In its favour: precipitation 39 mm / 1.5 in, share of daylight that is sunny 79%, wet days 6 days, days with heavy rain 1.1 days, relative humidity 68%.
Against: feels like (high) 6.9 °C / 44 °F, average daily high 10.2 °C / 50 °F, average daily low 1.7 °C / 35 °F.
Also on: Azalea bloom on Mt. Gyeyang.
Watch out for: Yellow dust storms.
April · best
In its favour: share of daylight that is sunny 74%, feels like (high) 14.1 °C / 57 °F, precipitation 65 mm / 2.6 in, average daily high 16 °C / 61 °F, wet days 7.2 days, days with heavy rain 2.4 days, relative humidity 68%, average daily low 7.7 °C / 46 °F.
Also on: Azalea bloom on Mt. Gyeyang, Cherry blossom season, Koryo Mountain Azalea Festival.
Watch out for: Cherry blossom season, Yellow dust storms.
May · best
In its favour: feels like (high) 21.3 °C / 70 °F, average daily high 21.2 °C / 70 °F, share of daylight that is sunny 71%, wet days 7.4 days, days with heavy rain 2.8 days, average daily low 13.3 °C / 56 °F, relative humidity 74%.
Against: precipitation 93 mm / 3.7 in.
Also on: Azalea bloom on Mt. Gyeyang.
Watch out for: Yellow dust storms.
June · good
In its favour: feels like (high) 27.9 °C / 82 °F, average daily high 25.3 °C / 78 °F, share of daylight that is sunny 69%, wet days 7.8 days, average daily low 18.8 °C / 66 °F.
Against: precipitation 111 mm / 4.4 in, relative humidity 79%, days with heavy rain 3.2 days.
September · good
In its favour: feels like (high) 27.9 °C / 82 °F, average daily high 25.8 °C / 78 °F, share of daylight that is sunny 69%, wet days 8.3 days, average daily low 18.8 °C / 66 °F.
Against: precipitation 126 mm / 4.9 in, days with heavy rain 4 days, relative humidity 78%.
Also on: Salt harvesting at Sorae Wetland.
Watch out for: Chuseok.
October · best
In its favour: feels like (high) 19.1 °C / 66 °F, average daily high 20 °C / 68 °F, precipitation 58 mm / 2.3 in, share of daylight that is sunny 78%, wet days 6 days, days with heavy rain 1.7 days, average daily low 11.5 °C / 53 °F, relative humidity 74%.
Watch out for: Chuseok.
November · good
In its favour: precipitation 47 mm / 1.8 in, share of daylight that is sunny 75%, days with heavy rain 1.3 days, wet days 7.1 days, relative humidity 70%, average daily low 4.2 °C / 40 °F.
Against: feels like (high) 9.3 °C / 49 °F, sunshine per day 7.6 h, average daily high 12.3 °C / 54 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: best
- AApril: best
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- March–May, October–November
- Good
- June
Incheon rewards hikers with a dry, cool stretch from March through May and again in October and November, when trails stay dry and the temperature suits exertion, with June a fair but wetter transition. December through February are too cold, and the July-September monsoon brings heavy rain, humidity and mud that make trekking unenjoyable.
Why these months
March · best
In its favour: precipitation 39 mm / 1.5 in, average daily high 10.2 °C / 50 °F, wet days 6 days, days with heavy rain 1.1 days, share of daylight that is sunny 79%, daylight per day 12 h, average daily low 1.7 °C / 35 °F, wind (daily max) 19 km/h / 12 mph, feels like (high) 6.9 °C / 44 °F.
Also on: Azalea bloom on Mt. Gyeyang.
Watch out for: Yellow dust storms.
April · best
In its favour: average daily high 16 °C / 61 °F, wet days 7.2 days, feels like (high) 14.1 °C / 57 °F, average daily low 7.7 °C / 46 °F, share of daylight that is sunny 74%, daylight per day 13.2 h, wind (daily max) 19 km/h / 12 mph.
Against: days with heavy rain 2.4 days, precipitation 65 mm / 2.6 in.
Also on: Azalea bloom on Mt. Gyeyang, Cherry blossom season, Koryo Mountain Azalea Festival.
Watch out for: Cherry blossom season, Yellow dust storms.
May · best
In its favour: average daily high 21.2 °C / 70 °F, wet days 7.4 days, feels like (high) 21.3 °C / 70 °F, average daily low 13.3 °C / 56 °F, share of daylight that is sunny 71%, daylight per day 14.2 h, wind (daily max) 18 km/h / 11 mph.
Against: days with heavy rain 2.8 days, precipitation 93 mm / 3.7 in.
Also on: Azalea bloom on Mt. Gyeyang.
Watch out for: Yellow dust storms.
June · good
In its favour: wet days 7.8 days, average daily high 25.3 °C / 78 °F, share of daylight that is sunny 69%, daylight per day 14.7 h, wind (daily max) 16 km/h / 10 mph.
Against: precipitation 111 mm / 4.4 in, days with heavy rain 3.2 days, relative humidity 79%, average daily low 18.8 °C / 66 °F, feels like (high) 27.9 °C / 82 °F.
October · best
In its favour: average daily high 20 °C / 68 °F, precipitation 58 mm / 2.3 in, wet days 6 days, days with heavy rain 1.7 days, feels like (high) 19.1 °C / 66 °F, average daily low 11.5 °C / 53 °F, share of daylight that is sunny 78%, daylight per day 11.2 h, wind (daily max) 15 km/h / 10 mph.
Watch out for: Chuseok.
November · best
In its favour: average daily high 12.3 °C / 54 °F, precipitation 47 mm / 1.8 in, wet days 7.1 days, days with heavy rain 1.3 days, average daily low 4.2 °C / 40 °F, share of daylight that is sunny 75%, feels like (high) 9.3 °C / 49 °F, wind (daily max) 17 km/h / 11 mph, daylight per day 10.2 h.
Against: sunshine per day 7.6 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is 곤지암스키장, Konjiam Resort, 53 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | -2.3 °C | 0.4 °C | 6.9 °C | 14.1 °C | 21.3 °C | 27.9 °C | 32.5 °C | 34.3 °C | 27.9 °C | 19.1 °C | 9.3 °C | -0.1 °C |
| Days with heavy rain | 0.2 days | 0.7 days | 1.1 days | 2.4 days | 2.8 days | 3.2 days | 7.3 days | 5.8 days | 4 days | 1.7 days | 1.3 days | 0.6 days |
| Time rain usually falls | 8 pm | 9 am | 1 am | 1 pm | 6 am | 2 am | 3 am | 9 am | 3 am | 12 pm | 3 am | 2 pm |
| Sunshine per day | 8 h | 8.6 h | 9.4 h | 9.7 h | 10 h | 10.1 h | 7.9 h | 8.8 h | 8.5 h | 8.7 h | 7.6 h | 7.6 h |
| Relative humidity | 65% | 66% | 68% | 68% | 74% | 79% | 85% | 83% | 78% | 74% | 70% | 67% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 33.1 µg/m³ | 28.5 µg/m³ | 33.5 µg/m³ | 32.2 µg/m³ | 30.6 µg/m³ | 28.5 µg/m³ | 25 µg/m³ | 27.8 µg/m³ | 23 µg/m³ | 24.4 µg/m³ | 29.1 µg/m³ | 27.5 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 57.7 µg/m³ | 47.9 µg/m³ | 52.1 µg/m³ | 49.9 µg/m³ | 45.7 µg/m³ | 44.1 µg/m³ | 42.9 µg/m³ | 46.7 µg/m³ | 40.5 µg/m³ | 40.8 µg/m³ | 51.5 µg/m³ | 51.6 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
Events and seasons
What the weather records cannot show. A major event can lift a month to good or best. The warnings are there to help you plan, and never count against a month.
Reasons to go
- Azalea bloom on Mt. Gyeyang
March, April and May
- Koryo Mountain Azalea Festival
April
- Cherry blossom season
April
- Salt harvesting at Sorae Wetland
August and September
Worth knowing before you go
- Lunar New Year (Seollal)
January and February, dates vary from year to year
- Yellow dust storms
March, April and May, dates vary from year to year
- Cherry blossom season
April
- Chuseok
September and October, dates vary from year to year