Next 3 days weather summary:Heavy rain (total 23.0mm), heaviest during Mon morning. Very mild (max 14°C on Sun morning, min 10°C on Sat morning). Wind will be generally light. | Days 4-6 weather summary:Heavy rain (total 42.0mm), heaviest during Thu afternoon. Very mild (max 16°C on Wed afternoon, min 10°C on Tue night). Wind will be generally light. | |||||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | |  |  |  | | | | |  |  | |  | |  |  | |
light rain | light rain | light rain | light rain | rain shwrs | cloudy | mod. rain | light rain | light rain | light rain | light rain | some clouds | clear | clear | rain shwrs | mod. rain | heavy rain | heavy rain | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 3 | 3 | 1 | 1 | 2 | — | 8 | 4 | 1 | 2 | 2 | — | — | — | 1 | 7 | 15 | 15 |
max °C | 11 | 11 | 11 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 15 | 16 | 12 | 12 | 12 | 12 |
min °C | 10 | 10 | 10 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 12 | 12 | 12 | 12 | 12 | 12 |
chill °C | 9 | 10 | 10 | 13 | 13 | 13 | 12 | 11 | 10 | 11 | 10 | 10 | 12 | 11 | 11 | 12 | 12 | 12 |
Humid % | 93 | 97 | 93 | 89 | 83 | 85 | 87 | 91 | 91 | 95 | 90 | 89 | 75 | 64 | 87 | 95 | 97 | 99 |
Freeze m | 3700 | 3900 | 3950 | 3850 | 3950 | 4150 | 3900 | 4200 | 4050 | 4000 | 3800 | 4050 | 4350 | 4300 | 4500 | 4350 | 4350 | 4400 |
 | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — |
 | — | 5:37 | — | — | 5:36 | — | — | 5:35 | — | — | 5:32 | — | — | 5:31 | — | — | 5:30 | — |
SnowPro
Hourly & 16-day forecastsView past weatherFast, ad-free browsingSnow hindcasts & HistoryAvalanche 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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