Best time to visit Jeju City
Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Similar climatesFukuoka87% · Kyoto81% · Hakone81%
Other destinations with the most-alike year-round climate to Jeju City (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Jeju City's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 3–8 | 4 | 16 | 230 | 14.4 | 72% | 22 | 126 | 2 | Quiet | 3 |
| Feb | 4–10 | 6 | 14 | 198 | 14.1 | 71% | 22 | 126 | 3 | Quiet | 4 |
| Mar | 7–14 | 11 | 13 | 152 | 11.7 | 69% | 20 | 177 | 4 | Quiet | 6 |
| Apr | 11–17 | 15 | 10 | 121 | 12.1 | 69% | 19 | 202 | 6 | Quiet | 7 |
| May | 15–22 | 22 | 11 | 135 | 12.3 | 71% | 18 | 209 | 6 | Quiet | 7 |
| Jun | 20–25 | 28 | 14 | 199 | 14.2 | 80% | 17 | 177 | 7 | Quiet | 6 |
| Jul | 24–29 | 34 | 20 | 282 | 14.1 | 82% | 18 | 181 | 8 | Quiet | 2 |
| Aug | 25–30 | 35 | 19 | 263 | 13.8 | 78% | 16 | 241 | 8 | Peak | 1 |
| Sep | 22–26 | 29 | 18 | 280 | 15.6 | 79% | 20 | 180 | 6 | Quiet | 4 |
| Oct | 16–21 | 20 | 10 | 140 | 14.0 | 70% | 19 | 192 | 5 | Quiet | 7 |
| Nov | 11–16 | 14 | 12 | 176 | 14.7 | 70% | 21 | 154 | 3 | Peak | 6 |
| Dec | 5–9 | 6 | 15 | 223 | 14.9 | 70% | 23 | 125 | 2 | Peak | 3 |
UV Index in Jeju City by Month
UV index in Jeju City peaks at 8 (very high) in August, dropping to 2 (low) in December. July, August reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
Best months in detail
May
7/1015–22°C · 11 rain days (135h) · 209 sun hours · 71% humidity · Quiet crowd · UV 6 (high) · sunniest 1 in 10 days reach 9 (very high)
October
7/1016–21°C · 10 rain days (140h) · 192 sun hours · 70% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
April
7/1011–17°C (feels 15°C) · 10 rain days (121h) · 202 sun hours · 69% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (high)
Every month
Show the other 9 months in detail
January
3/103–8°C (feels 4°C) · 16 rain days (230h) · 126 sun hours · 72% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
February
4/104–10°C (feels 6°C) · 14 rain days (198h) · 126 sun hours · 71% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
March
6/107–14°C (feels 11°C) · 13 rain days (152h) · 177 sun hours · 69% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (high)
June
6/1020–25°C (feels 28°C) · 14 rain days (199h) · 177 sun hours · 80% humidity · Quiet crowd · UV 7 (high) · sunniest 1 in 10 days reach 10 (very high)
July
2/1024–29°C (feels 34°C) · 20 rain days (282h) · 181 sun hours · 82% humidity · Quiet crowd · UV 8 (very high) · sunniest 1 in 10 days reach 11 (very high)
August
1/1025–30°C (feels 35°C) · 19 rain days (263h) · 241 sun hours · 78% humidity · Peak crowd · UV 8 (very high) · sunniest 1 in 10 days reach 10 (very high)
September
4/1022–26°C (feels 29°C) · 18 rain days (280h) · 180 sun hours · 79% humidity · Quiet crowd · UV 6 (high) · sunniest 1 in 10 days reach 8 (very high)
November
6/1011–16°C (feels 14°C) · 12 rain days (176h) · 154 sun hours · 70% humidity · Peak crowd · UV 3 (moderate)
December
3/105–9°C (feels 6°C) · 15 rain days (223h) · 125 sun hours · 70% humidity · Peak crowd · UV 2 (low)
Frequently asked questions about visiting Jeju City
When is the best time to visit Jeju City?
May is the highest-scoring month (7/10 on the Holiday Climate Index). Typical conditions: 15–22°C (11 rainy days). The top three months by score are May, October, April.
What is the worst time to visit Jeju City?
August is the lowest-scoring month (1/10, capped by extreme heat). Typical conditions: 25–30°C (19 rainy days).
Is Jeju City too hot in summer?
2 months (July, August) trip the heat deal-breaker in our scoring: apparent temperature crosses the comfort cap, so even with clear skies and low rain the score is held down. Plan around it if heat tolerance is low.
When are crowds lowest in Jeju City?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in November. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Jeju City have good weather but fewer tourists?
April (climate 7/10, crowd index 0) and May (climate 7/10, crowd index 0) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Jeju City by month?
UV peaks at 8 (very high) in August and is lowest in December at 2 (low). Monthly peak values: Jan 2, Feb 3, Mar 4, Apr 6, May 6, Jun 7, Jul 8, Aug 8, Sep 6, Oct 5, Nov 3, Dec 2. July, August reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
What is the UV index in Jeju City in August?
August is the peak UV month in Jeju City, with a daily-peak UV index of 8 (very high). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).
How high can UV get in Jeju City on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. July is the worst case: typical days average UV 8 (very high), but the top 10% of days reach UV 11 (very high) — and even higher. Months where the sunniest days routinely exceed the typical reading: January, February, March, April, May, June, July, August, September, October. Plan sun protection for the worst case, not the average.
Is air quality in Jeju City bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 11 months: January, February, March, April, May, June, July, August, September, November, December. The worst month is March with a typical-day mean of 22 µg/m³ (unhealthy for sensitive); on the worst 10% of days PM2.5 reaches 36 µg/m³ (hazardous) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.