Ski resort · Japan
Best time to visit IOX-AROSA
The colour shows how good it gets. Tap a card to see that kind of trip at its best time of year; your own preferences stay as they are.
The ski season in IOX-AROSA typically runs January, when there is snow on the ground and it is cold enough. For a visit without snow, the best time is May, with daytime temperatures around 22°C.
IOX-AROSA at a glance: warmest in August with daytime temperatures around 30°C and coolest in January (4°C). The wettest month is July (267 mm) and the driest April (136 mm), with about 2,280 mm of rain a year. The sea is warmest in August (28°C). Sunniest in April.
IOX-AROSA
380 mThe climate in IOX-AROSA through the year
When to go
No month in IOX-AROSA reaches a good score (65 or more) with the default preferences. May comes closest with 58 out of 100. A typical May day reaches 22°C and the night falls to 11°C, with rain on about 16 days and clear sky 36 % of the time. June and September are a fair alternative, with scores of 50–54. The lowest score is in January (13), when days are cool at around 4°C.
Seasons and rain
The seasons are sharply different: a August day (30°C) is about 26 degrees warmer than a January day (4°C). Nights typically drop below freezing in December–March. Precipitation is spread evenly over the year, from 136 mm in April to 267 mm in July (about 2,280 mm in all). The air feels muggy in July and August. Snow typically lies on the ground in January–March, deepest in February (about 40 cm).
Sea and daylight
The sea is 22°C or warmer in July–October, peaking at 28°C in August. It is coldest in March (11°C). Daylight lasts from about 9.5 hours in December to 14.5 hours in June.
By type of trip
The best months change with what you want to do. Each of Eddigo’s trip types has its own preferred daytime temperature and its own weights for rain, humidity and sun. IOX-AROSA scores 65 or more in these months:
- Cooler weather (10–20 °C): March–May and October–November, up to 81
- Skiing: snow cover and cold enough in January
How it compares
Of the 191 destinations Eddigo covers in Japan, IOX-AROSA is the 44th warmest over the year and the 5th wettest. In May, when IOX-AROSA scores 58, Hakusan Ichirino Onsen Ski Resort (30 km away) scores 47 and Tateyama Sanroku Ski Resort (54 km away) scores 55. See where to go in May for the best destinations that month.
Month by month
| Month | Score | Day | Night | Sea | Rain | Wet days (≥ 1 mm) | Sun | Daylight | Feels like |
|---|---|---|---|---|---|---|---|---|---|
| January | 13 | 4° | −3° | 13° | 214 mm | 24 | 15 % | 10 h | Cold, snowy and grey · ski conditions |
| February | 13 | 6° | −3° | 11° | 138 mm | 20 | 17 % | 11 h | Chilly, rainy and grey |
| March | 14 | 10° | 0° | 11° | 146 mm | 20 | 26 % | 12 h | Chilly and rainy |
| April | 44 | 17° | 6° | 13° | 136 mm | 15 | 38 % | 13 h | Mild and showery |
| May | 58 | 22° | 11° | 17° | 140 mm | 15 | 36 % | 14 h | Pleasantly warm and showery |
| June | 54 | 25° | 16° | 21° | 187 mm | 16 | 25 % | 15 h | Warm, rainy and grey |
| July | 39 | 29° | 21° | 26° | 267 mm | 19 | 19 % | 14 h | Warm, rainy and muggy |
| August | 34 | 30° | 21° | 28° | 191 mm | 18 | 34 % | 14 h | Hot, rainy and muggy |
| September | 50 | 26° | 17° | 26° | 228 mm | 18 | 25 % | 12 h | Warm and rainy |
| October | 48 | 19° | 10° | 23° | 184 mm | 17 | 27 % | 11 h | Pleasantly warm and rainy |
| November | 23 | 14° | 5° | 19° | 190 mm | 20 | 28 % | 10 h | Mild and rainy |
| December | 13 | 7° | 0° | 16° | 263 mm | 26 | 20 % | 10 h | Chilly, rainy and grey |
The score (0–100) is calculated from a range of variables, and changes with your preferences.
Climate averages 2016–2025 (ERA5, CRU TS). Sea temperature from ERA5. Not a forecast. Elevation: 383 m. Coordinates: 36.52, 136.82.