Jeju-si (Jeju City)
May
Weather in Jeju-si for May 2026
Your guide to Jeju-si weather in May - trends and predictions
In general, the average temperature in Jeju-si at the beginning of May is 18.6 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22.1 °C by the end of May.
Jeju-si experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 170 mm.
Temperatures
Rain 🌧️
10
Dry days
21
Rainy days
0
Snow days
20°/15°
Temperatures
18 km/h
Avg max wind
70 %
Avg humidity
Jeju-si Weather May
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Temperatures trend during May in Jeju-si
See the weather trend as well as the moving average line
May weather in Jeju-si day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Cloudy | 17° /11° | 5.9 mm | 4 | |
| 2 May |  Sunny | 17° /11° | 0.1 mm | 4 | |
| 3 May | Sunny | 19° /11° | 2.9 mm | 5 | |
| 4 May |  Moderate or heavy rain shower | 20° /13° | 27.7 mm | 5 | |
| 5 May |  Overcast | 20° /15° | 33.4 mm | 5 | |
| 6 May |  Patchy rain possible | 19° /14° | 4 mm | 5 | |
| 7 May | Sunny | 18° /13° | 4.8 mm | 4 | |
| 8 May | Patchy rain possible | 19° /12° | 0.7 mm | 5 | |
| 9 May | Sunny | 19° /12° | 12.2 mm | 5 | |
| 10 May | Sunny | 20° /14° | 0.5 mm | 5 | |
| 11 May | Moderate rain at times | 20° /14° | 4.1 mm | 5 | |
| 12 May | Moderate or heavy rain shower | 20° /14° | 3.5 mm | 5 | |
| 13 May | Overcast | 19° /14° | 1.4 mm | 5 | |
| 14 May |  Partly cloudy | 20° /14° | 0.9 mm | 5 | |
| 15 May | Moderate or heavy rain shower | 21° /14° | 4.3 mm | 5 | |
| 16 May | Sunny | 22° /16° | 11.4 mm | 5 | |
| 17 May | Overcast | 22° /15° | 0.1 mm | 5 | |
| 18 May | Sunny | 21° /15° | 14 mm | 5 | |
| 19 May | Overcast | 22° /15° | 0.1 mm | 5 | |
| 20 May | Moderate or heavy rain shower | 22° /16° | 14 mm | 5 | |
| 21 May | Sunny | 21° /16° | 3.5 mm | 5 | |
| 22 May | Sunny | 22° /16° | 0.4 mm | 5 | |
| 23 May | Sunny | 22° /16° | 0.9 mm | 5 | |
| 24 May | Patchy rain possible | 21° /16° | 1.4 mm | 5 | |
| 25 May | Sunny | 22° /15° | 0.1 mm | 5 | |
| 26 May | Patchy rain possible | 22° /16° | 4.6 mm | 5 | |
| 27 May | Cloudy | 22° /16° | 2.1 mm | 6 | |
| 28 May | Sunny | 23° /17° | 0.3 mm | 6 | |
| 29 May | Partly cloudy | 22° /17° | 1.8 mm | 6 | |
| 30 May | Overcast | 22° /17° | 5.1 mm | 5 | |
| 31 May | Overcast | 22° /17° | 4.1 mm | 5 | |
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Important Notice
Our weather forecast for Jeju-si in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Jeju-si forecast closer to your planned date for the most up-to-date weather information.
Change Month
Jeju-si in May - FAQ
What are the expected maximum and minimum temperatures in Jeju-si during May?
During May, expect a variety of temperatures with highs around 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jeju-si during May?
Significant rainfall exceeding 170 mm is expected in Jeju-si during May, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Jeju-si during May?
The average wind speed in Jeju-si during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Jeju-si
Explore the daily rainfall trends and prepare for Jeju-sis May weather 💧
UV exposure in Jeju-si during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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