Next 3 days weather summary:Heavy rain (total 39.0mm), heaviest during Sun night. Very mild (max 19°C on Sun afternoon, min 15°C on Mon afternoon). Wind will be generally light. | Days 4-6 weather summary:Light rain (total 6.0mm), mostly falling on Thu morning. Warm (max 20°C on Wed morning, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||
Sat 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | | |  | |  |  |  |  | |  |  | |
mod. rain | cloudy | light rain | t-storm risk | heavy rain | light rain | light rain | cloudy | cloudy | cloudy | clear | clear | some clouds | some clouds | light rain | rain shwrs | rain shwrs | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 8 | — | 3 | 4 | 15 | 5 | 4 | — | — | — | — | — | — | — | 1 | 2 | 3 |
max °C | 17 | 17 | 18 | 19 | 18 | 18 | 16 | 16 | 16 | 16 | 15 | 20 | 20 | 18 | 18 | 18 | 16 |
min °C | 17 | 17 | 18 | 18 | 18 | 17 | 15 | 16 | 16 | 15 | 15 | 18 | 18 | 17 | 18 | 17 | 13 |
chill °C | 17 | 17 | 18 | 18 | 18 | 17 | 15 | 16 | 16 | 15 | 15 | 18 | 18 | 17 | 18 | 17 | 12 |
Humid % | 94 | 82 | 93 | 92 | 97 | 76 | 89 | 76 | 77 | 79 | 83 | 63 | 68 | 74 | 95 | 91 | 88 |
Freeze m | 4550 | 4400 | 4350 | 4350 | 4550 | 4350 | 4400 | 4600 | 4300 | 4550 | 4500 | 4600 | 4700 | 4650 | 4500 | 4600 | 4450 |
 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | 6:02 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — | — | 5:57 | — | — | 5:55 | — |
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. |
|---|---|
0.0 | 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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