Weather Comparison
Side-by-side weather comparison for May
| Metric | Hong Kong | Seoul | Better |
|---|---|---|---|
| Average HighHigher is warmer | 25°C (77°F)▲ | 22°C (72°F) | Hong Kong |
| Average LowHigher is milder | 17°C (63°F)▲ | 12°C (54°F) | Hong Kong |
| Rain DaysFewer is drier | 6 days▲ | 8 days | Hong Kong |
| PrecipitationLess is drier | 67 mm▲ | 95 mm | Hong Kong |
| Sunshine HoursMore is sunnier | 7h/day | 10h/day▲ | Seoul |
| HumidityLower is more comfortable | 75% | 65%▲ | Seoul |
| UV IndexLower is safer | 9 | 9 | Tie |
| Wind SpeedCalmer is better | 15 km/h▲ | 16 km/h | Hong Kong |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in May. Seoul offers 10 hours of daily sunshine with only 8 rain days, while Hong Kong sees 7 sunshine hours and 6 rain days.
Hong Kong sits in the comfortable travel range at 25°C. Seoul is also comfortable at 22°C.
For travelers who prioritize dry weather, Hong Kong is the stronger choice in May. Seoul receives 3 more hours of sunshine per day, which matters for sightseeing and outdoor activities.
Hong Kong reaches an average high of 25°C (77°F) and drops to 17°C (63°F) at night during May. The daily temperature range is 8°C, meaning moderate variation throughout the day.
Seoul averages 22°C (72°F) for the high and 12°C (54°F) for the low, with a daily range of 10°C. The 3°C difference is noticeable but not dramatic.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.
Hong Kong receives approximately 67 mm of rainfall across 6 rain days during May. Rain is occasional, so a light rain jacket should suffice.
Seoul sees 95 mm over 8 rain days. That makes Hong Kong the drier option by 2 rain days and 28 mm of total precipitation.
Humidity also differs: Hong Kong averages 75% while Seoul sits at 65%. Hong Kong will feel muggier, especially at higher temperatures.
Highs of 25°C, lows of 17°C, 6 rain days
Highs of 22°C, lows of 12°C, 8 rain days
Pack for both: light layers, a light jacket for evenings, sunscreen, a packable rain jacket, an umbrella. These items are useful in either destination during May.
The table below shows average high temperatures and rain days for every month. May is highlighted for quick reference.
| Month | Hong Kong | Seoul | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 14°C | 3d | 1°C | 4d |
| Feb | 16°C | 3d | 4°C | 4d |
| Mar | 19°C | 4d | 10°C | 6d |
| Apr | 23°C | 5d | 17°C | 7d |
| May | 25°C | 6d | 22°C | 8d |
| Jun | 26°C | 6d | 26°C | 9d |
| Jul | 25°C | 6d | 28°C | 17d |
| Aug | 23°C | 5d | 29°C | 16d |
| Sep | 19°C | 4d | 25°C | 8d |
| Oct | 16°C | 3d | 19°C | 5d |
| Nov | 14°C | 3d | 11°C | 7d |
| Dec | 13°C | 3d | 3°C | 5d |
Hong Kong Weather in May
Full forecast, packing tips, and activities
Seoul Weather in May
Full forecast, packing tips, and activities