Next 4 days weather summary:Heavy rain (total 48.0mm), heaviest during Sat afternoon. Warm (max 21°C on Sat morning, min 16°C on Sun night). Wind will be generally light. | Days 5-7 weather summary:Heavy rain (total 56.0mm), heaviest during Tue night. Very mild (max 17°C on Thu afternoon, min 12°C on Mon night). Wind will be generally light. | |||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  | | |  |  |  |  | |  | | |
rain shwrs | t-storm risk | mod. rain | light rain | t-storm risk | t-storm risk | t-storm risk | t-storm risk | t-storm risk | some clouds | light rain | heavy rain | heavy rain | light rain | rain shwrs | light rain | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 6 | 5 | 10 | 4 | 4 | 11 | 4 | 2 | 2 | — | 1 | 16 | 27 | 2 | 2 | 4 |
max °C | 19 | 21 | 20 | 18 | 19 | 19 | 17 | 19 | 19 | 14 | 15 | 15 | 15 | 15 | 15 | 15 |
min °C | 18 | 20 | 19 | 17 | 19 | 18 | 16 | 17 | 16 | 12 | 14 | 14 | 13 | 14 | 15 | 14 |
chill °C | 18 | 20 | 19 | 17 | 19 | 18 | 16 | 17 | 16 | 11 | 13 | 12 | 11 | 12 | 14 | 13 |
Humid % | 86 | 79 | 83 | 79 | 78 | 82 | 91 | 86 | 72 | 82 | 76 | 98 | 95 | 85 | 80 | 95 |
Freeze m | 5000 | 4950 | 4950 | 4800 | 4750 | 4800 | 4800 | 4650 | 4750 | 4500 | 4500 | 4800 | 4800 | 4600 | 4650 | 4550 |
 | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — |
 | — | — | 6:45 | — | — | 6:45 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — |
SnowProGo pro and carve into:
Avalanche information: Japan Avalanche Network
Latest snow reports near Sun Valley (Nagano):
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 9 May 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 Sun Valley (Nagano) at the specific elevation of 1600 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Sun Valley (Nagano). 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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