Weather in Jeju: May
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Average day temperature: | 67.8°F |
| Average night temperature: | 61.1°F | |
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Sea water temperature: | 61.9°F |
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Number of sunny days: | 15 days |
| Day length: | 13.5 - 14.2 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 4.6 in. | |
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forecast
| Jeju |
temperature
| Jeju |
Air temperature in May, °F
The highest day temperature during May of 2025 was 75°F. At the same time the lowest night temperature was 50°F. Daily and nightly averages during May were 66.0°F and 59.7°F.
Sea water temperature in Jeju in May, °F
The average sea water temperature in May of 2025 was 60.9°F. The highest and lowest sea temperatures during the month were 63.0°F and 59.2°F.
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Jeju in May is 4.9 in. Other months of the year show relatively similar values.
The average wind speed value in May is 9.2 mph It makes May one of the least windy months of the year.
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: 8.7.
Best time for vacation in Jeju
Jeju on a weather map
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