Climate averages 1991–2020
Incheon weather
in October.
A mild, moderately wet month: the 6th warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Incheon: daytime highs average 18.1°C and nights cool to about 10.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 54 mm of rain on roughly 5 days, which makes October a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 16 min on an average October day.
The nearest other city in this atlas is Bucheon-si (8 km away). In October its highs average 18.5°C, about as warm as Incheon, with 54 mm of rain.
Among the 79 cities listed in South Korea, Incheon ranks joint 75th of 79 for the warmest October highs and joint 10th of 79 for the driest October (rainfall, lowest first). The mean October high of those 79 cities is 19.3°C; Incheon is 1.2°C cooler than that mean.
From October to November, average highs fall by 7.5°C to 10.6°C, and monthly rainfall falls from 54 mm to 48 mm.
The annual picture
October in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Incheon climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.4°C-5.8°C | -5.8°C | 18 | 3.6 | 9.910 h |
| February | 3.7°C-4.1°C | -4.1°C | 24 | 3.9 | 10.811 h |
| March | 8.5°C0.2°C | 0.2°C | 36 | 5.5 | 11.912 h |
| April | 14.4°C6.1°C | 6.1°C | 65 | 7.0 | 13.113 h |
| May | 19.6°C11.8°C | 11.8°C | 92 | 7.5 | 14.214 h |
| June | 23.9°C17.2°C | 17.2°C | 122 | 7.8 | 14.715 h |
| July | 26.4°C21.5°C | 21.5°C | 298 | 15.0 | 14.514 h |
| August | 27.6°C22.6°C | 22.6°C | 244 | 13.8 | 13.614 h |
| September | 24.0°C17.7°C | 17.7°C | 121 | 7.6 | 12.512 h |
| October, selected | 18.1°C10.7°C | 10.7°C | 54 | 5.3 | 11.311 h |
| November | 10.6°C3.4°C | 3.4°C | 48 | 7.3 | 10.210 h |
| December | 3.6°C-3.5°C | -3.5°C | 22 | 5.0 | 9.610 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Bucheon-si in OctoberSouth Korea · 8 kmHigh 18.5°C · Low 10.4°C · 54 mm rain
- Gwangmyeong in OctoberSouth Korea · 14 kmHigh 18.6°C · Low 9.7°C · 54 mm rain
- Ansan-si in OctoberSouth Korea · 18 kmHigh 18.5°C · Low 10.9°C · 62 mm rain
- Gimpo-si in OctoberSouth Korea · 19 kmHigh 18.3°C · Low 10.4°C · 54 mm rain
- Anyang-si in OctoberSouth Korea · 21 kmHigh 18.4°C · Low 10.3°C · 55 mm rain
- Goyang-si in OctoberSouth Korea · 25 kmHigh 18.4°C · Low 9.3°C · 52 mm rain
- Seoul in OctoberSouth Korea · 27 kmHigh 18.6°C · Low 9.0°C · 55 mm rain
- Hwaseong-si in OctoberSouth Korea · 29 kmHigh 18.1°C · Low 12.0°C · 62 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Incheon) is explained once on the Incheon year overview and on the Sources, method and limits page.
Bucheon-si, Gwangmyeong and Gimpo-si lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.