Weather in Incheon: May
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Average day temperature: | 67.6°F |
| Average night temperature: | 59.7°F | |
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Sea water temperature: | 58.1°F |
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Number of sunny days: | 18 days |
| Day length: | 13.7 - 14.5 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 2.9 in. | |
| more information | ||
14 days
forecast
forecast
| Incheon |
sea water
temperature
temperature
| Incheon |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 75°F. At the same time the lowest night temperature was 51°F. Daily and nightly averages during May were 65.4°F and 60.1°F.
Sea water temperature in Incheon in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 60.5°F. The highest and lowest sea temperatures during the month were 66.6°F and 57.0°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Incheon in May is 3.5 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 8.8 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 9.3.
Best time for vacation in Incheon
Incheon on a weather map
Places in South Korea:
Name
°F
24 Hours Forecast
Incheon
Local time: 02:02
May 30, saturday
0300
63°F
N
7 mph
7 mph
0600
63°F
N
7 mph
7 mph
0900
66°F
N
9 mph
9 mph
1200
70°F
NE
9 mph
9 mph
1500
72°F
NE
11 mph
11 mph
1800
72°F
NE
12 mph
12 mph
2100
66°F
NE
7 mph
7 mph
May 31, sunday
0000
66°F
NW
6 mph
6 mph
