Best time to visit Ulleungdo
The best time to visit Ulleungdo is June and October, judged on twenty years of weather records and the events worth going for.
Ulleungdo, Gyeongsangbuk-do, South Korea
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 6.4 °C / 44 °F | 3.6 °C / 38 °F | 90 mm / 3.5 in | neither best nor good |
| February | 7.1 °C / 45 °F | 4 °C / 39 °F | 70 mm / 2.8 in | neither best nor good |
| March | 9.7 °C / 49 °F | 6.8 °C / 44 °F | 62 mm / 2.4 in | neither best nor good |
| April | 12.9 °C / 55 °F | 10.6 °C / 51 °F | 67 mm / 2.6 in | good month |
| May | 16.7 °C / 62 °F | 14.9 °C / 59 °F | 71 mm / 2.8 in | good month |
| June | 20.6 °C / 69 °F | 19.2 °C / 67 °F | 77 mm / 3 in | best month |
| July | 24.2 °C / 76 °F | 22.9 °C / 73 °F | 136 mm / 5.3 in | good month |
| August | 26.3 °C / 79 °F | 25 °C / 77 °F | 120 mm / 4.7 in | neither best nor good |
| September | 23.3 °C / 74 °F | 21.8 °C / 71 °F | 131 mm / 5.1 in | good month |
| October | 19.3 °C / 67 °F | 17.2 °C / 63 °F | 84 mm / 3.3 in | best month |
| November | 14.4 °C / 58 °F | 11.5 °C / 53 °F | 73 mm / 2.9 in | good month |
| December | 8.9 °C / 48 °F | 5.8 °C / 42 °F | 107 mm / 4.2 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: good
- JJune: best
- JJuly: good
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: good
- DDecember: neither
- Best
- June, October
- Good
- April–May, July, September, November
Why these months
April · good
In its favour: share of daylight that is sunny 78%, precipitation 67 mm / 2.6 in, wet days 7.8 days, days with heavy rain 2.5 days, average daily low 10.6 °C / 51 °F, relative humidity 74%.
Against: feels like (high) 10.2 °C / 50 °F, average daily high 12.9 °C / 55 °F.
May · good
In its favour: feels like (high) 15.8 °C / 60 °F, share of daylight that is sunny 76%, precipitation 71 mm / 2.8 in, average daily high 16.7 °C / 62 °F, wet days 6.2 days, days with heavy rain 2.5 days, average daily low 14.9 °C / 59 °F.
Against: relative humidity 81%.
June · best
In its favour: feels like (high) 22 °C / 72 °F, average daily high 20.6 °C / 69 °F, share of daylight that is sunny 76%, precipitation 77 mm / 3 in, wet days 5.8 days, days with heavy rain 2.1 days, average daily low 19.2 °C / 67 °F.
Against: relative humidity 86%.
July · good
In its favour: feels like (high) 27.4 °C / 81 °F, average daily high 24.2 °C / 76 °F, share of daylight that is sunny 69%, wet days 9.1 days, days with heavy rain 3.9 days.
Against: precipitation 136 mm / 5.3 in, relative humidity 89%, average daily low 22.9 °C / 73 °F.
September · good
In its favour: feels like (high) 24.4 °C / 76 °F, average daily high 23.3 °C / 74 °F, share of daylight that is sunny 72%, wet days 8.1 days, precipitation 131 mm / 5.1 in, days with heavy rain 3.5 days, relative humidity 75%, average daily low 21.8 °C / 71 °F.
October · best
In its favour: feels like (high) 17.5 °C / 64 °F, average daily high 19.3 °C / 67 °F, share of daylight that is sunny 74%, precipitation 84 mm / 3.3 in, wet days 7.5 days, days with heavy rain 2.9 days, average daily low 17.2 °C / 63 °F, relative humidity 66%.
November · good
In its favour: share of daylight that is sunny 76%, precipitation 73 mm / 2.9 in, average daily high 14.4 °C / 58 °F, days with heavy rain 2.1 days, average daily low 11.5 °C / 53 °F, relative humidity 63%, wet days 11.1 days.
Against: feels like (high) 10.5 °C / 51 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: best
- AApril: best
- MMay: best
- JJune: best
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: best
- NNovember: best
- DDecember: neither
- Best
- March–June, October–November
Why these months
March · best
In its favour: precipitation 62 mm / 2.4 in, average daily high 9.7 °C / 49 °F, days with heavy rain 1.9 days, wet days 9.2 days, average daily low 6.8 °C / 44 °F, share of daylight that is sunny 78%, daylight per day 12 h.
Against: feels like (high) 5.4 °C / 42 °F, wind (daily max) 36 km/h / 23 mph.
April · best
In its favour: average daily high 12.9 °C / 55 °F, precipitation 67 mm / 2.6 in, wet days 7.8 days, average daily low 10.6 °C / 51 °F, days with heavy rain 2.5 days, share of daylight that is sunny 78%, daylight per day 13.2 h, feels like (high) 10.2 °C / 50 °F.
Against: wind (daily max) 35 km/h / 22 mph.
May · best
In its favour: average daily high 16.7 °C / 62 °F, precipitation 71 mm / 2.8 in, wet days 6.2 days, days with heavy rain 2.5 days, feels like (high) 15.8 °C / 60 °F, share of daylight that is sunny 76%, daylight per day 14.2 h, average daily low 14.9 °C / 59 °F, wind (daily max) 32 km/h / 20 mph.
June · best
In its favour: average daily high 20.6 °C / 69 °F, precipitation 77 mm / 3 in, wet days 5.8 days, days with heavy rain 2.1 days, feels like (high) 22 °C / 72 °F, share of daylight that is sunny 76%, daylight per day 14.7 h, wind (daily max) 27 km/h / 17 mph.
Against: average daily low 19.2 °C / 67 °F.
October · best
In its favour: average daily high 19.3 °C / 67 °F, precipitation 84 mm / 3.3 in, wet days 7.5 days, feels like (high) 17.5 °C / 64 °F, share of daylight that is sunny 74%, days with heavy rain 2.9 days, daylight per day 11.2 h, wind (daily max) 32 km/h / 20 mph.
Against: average daily low 17.2 °C / 63 °F.
November · best
In its favour: average daily high 14.4 °C / 58 °F, precipitation 73 mm / 2.9 in, days with heavy rain 2.1 days, average daily low 11.5 °C / 53 °F, share of daylight that is sunny 76%, feels like (high) 10.5 °C / 51 °F, wet days 11.1 days, daylight per day 10.2 h.
Against: wind (daily max) 37 km/h / 23 mph.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is 오투리조트, O2 Resort, 173 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 0.8 °C | 1.7 °C | 5.4 °C | 10.2 °C | 15.8 °C | 22 °C | 27.4 °C | 30.2 °C | 24.4 °C | 17.5 °C | 10.5 °C | 3.4 °C |
| Days with heavy rain | 2.6 days | 2 days | 1.9 days | 2.5 days | 2.5 days | 2.1 days | 3.9 days | 3.4 days | 3.5 days | 2.9 days | 2.1 days | 3.5 days |
| Time rain usually falls | 4 am | 3 pm | 2 am | 11 pm | 5 am | 3 am | 6 am | 7 am | 7 am | 12 pm | 3 am | 3 am |
| Sunshine per day | 7.3 h | 8.1 h | 9.3 h | 10.2 h | 10.8 h | 11.1 h | 9.9 h | 10.3 h | 8.9 h | 8.3 h | 7.7 h | 7 h |
| Relative humidity | 64% | 64% | 67% | 74% | 81% | 86% | 89% | 84% | 75% | 66% | 63% | 64% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 11.2 µg/m³ | 14.4 µg/m³ | 20.5 µg/m³ | 21.1 µg/m³ | 16.5 µg/m³ | 16.6 µg/m³ | 13.1 µg/m³ | 10.9 µg/m³ | 9.2 µg/m³ | 10.9 µg/m³ | 11.9 µg/m³ | 9 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 17.3 µg/m³ | 21.4 µg/m³ | 30.4 µg/m³ | 28.4 µg/m³ | 23.1 µg/m³ | 24.8 µg/m³ | 18.4 µg/m³ | 15.3 µg/m³ | 12.8 µg/m³ | 15.4 µg/m³ | 18 µg/m³ | 15 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.