Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  | | | | | | |  |  |  | |
heavy rain | mod. rain | light rain | light rain | light rain | cloudy | some clouds | cloudy | cloudy | light rain | light rain | light rain | light rain | some clouds | light snow | light snow | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 |
mm | 40 | 8 | 2 | 4 | 1 | — | — | — | — | 1 | 3 | 3 | 2 | — | — | — |
max °C | 13 | 12 | 11 | 10 | 10 | 10 | 9 | 11 | 10 | 10 | 11 | 8 | 7 | 1 | 0 | 2 |
min °C | 12 | 12 | 10 | 9 | 9 | 9 | 7 | 9 | 10 | 10 | 10 | 7 | 2 | 0 | 0 | -2 |
chill °C | 11 | 11 | 7 | 7 | 7 | 8 | 6 | 8 | 8 | 8 | 7 | 1 | -5 | -8 | -8 | -11 |
Humid % | 97 | 99 | 98 | 97 | 91 | 86 | 82 | 78 | 89 | 95 | 98 | 92 | 87 | 83 | 79 | 97 |
Freeze m | 3350 | 3100 | 3400 | 3500 | 3450 | 3300 | 3200 | 2800 | 2850 | 2900 | 2750 | 2600 | 1300 | 1000 | 900 | 1100 |
 | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | — | 5:06 | — | — | 5:05 | — | — | 5:05 | — | — | 5:04 | — | — | 5:04 | — |
Next 4 days weather summary:Heavy rain (total 55.0mm), heaviest during Sat night. Very mild (max 13°C on Sat night, min 7°C on Mon night). Wind will be generally light. | Days 5-7 weather summary:Mild with light rain (total 9.0mm) on Wed morning Becoming colder with a light covering of snow, mostly falling on Thu night. Freeze-thaw conditions (max 11°C on Wed morning, min -2°C on Thu night). Winds increasing (light winds from the WSW on Tue night, near gales from the W by Wed night). | |||||||||||||||
SnowPro
Hourly & 16-day forecastsView past weatherFast, ad-free browsingSnow hindcasts & HistoryAvalanche information: Japan Avalanche Network
Latest snow reports near Osa:
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Mar 2026 |
| Snow Alerts | Create Alert |
0.0 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.2 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
The above table gives the weather forecast for Osa at the specific elevation of 865 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Osa. To access the weather forecasts for the other elevations, use the tab navigation above the table. For a wider view of the weather, check out the Weather Map of Japan.
Click here to read further information on freezing levels and how we forecast our temperatures.
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