Measurements:
°C
°F
Incheon
34°F
SE 9 mph
Feels like: 26°F
Precip: 0%
World Resorts South Korea Incheon Weather May Weather in Incheon

Incheon Weather: May

Average Day Temperature: 69.7°F
Average Night Temperature: 60.7°F
Sea Water Temperature: 58.8°F
Number of Sunny Days: 18 days
Sunshine Hours: 13.7 - 14.6 hours
Number of Rainy Days: 4 days
Precipitation Totals: 3.1 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 74°F. The lowest night temperature was 49°F. The average values for day and night temperatures during May were 63.9°F и 58.7°F respectivly.

Incheon Water Sea Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Incheon was 59.8°F. The maximum and minimum values were 53.4°F and 66.4°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Incheon is 3.1 in.

Wind Speed in May, mph

The average wind speed in May is 8.7 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Incheon in May is 10.1 hours.

Best Time to Visit Incheon
The most sunny months:
October 18 days
May 18 days
March 18 days
The most warm months:
August 88.2 °F
July 85.6 °F
September 81.7 °F
Warmest sea temperature:
August 82.3 °F
September 78.2 °F
July 77.4 °F
The most cold months:
January 32.2 °F
February 36.3 °F
December 36.6 °F
The most rainy months:
July 10 days
August 8 days
June 5 days
The most windy months:
December 11 mph
November 10 mph
February 10 mph

Incheon on the Weather Map

South Korea Resorts:
NAME
Busan +42
Incheon +34
Jeju +46
Muju +36
Seoul +32
Yongpyong +30
24 Hours Weather Forecast
Incheon
Local time: 16:18
05 dec, friday
1800 34°F
SE
4 mph
2100 34°F
W
1 mph
06 dec, saturday
0000 34°F
NW
6 mph
0300 36°F
N
8 mph
0600 36°F
N
11 mph
0900 38°F
N
11 mph
1200 42°F
N
14 mph
1500 44°F
N
14 mph