Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Weather Guide
Incheon, South Korea Average Monthly Weather
Weather score43Mixed annual avg
Best months: September, June, August
Across the year, average daytime temperatures are around 16°C, sunshine averages 6.6h per day, and rainfall totals about 1259mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
16°C
Rain
1259mm
Annual total
Sun
6.6h
Sea
13°C
Weather score
43
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 304mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.8h per day, enough for a balanced month.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Incheon, South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July28°C average high
July is one of Incheon's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July304mm average rain
July is one of Incheon's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to May and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July5.8 hours average sun
July is below Incheon's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July21°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
July50 weather score
July sits close to Incheon's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune and August to September
These months have the strongest weather score in the monthly averages.
