Access Road to Ski Portillo in Chile Now Closed For 4 Weeks Straight
Access to the iconic ski resort of Portillo in Chile by road has now been closed for what’s thought to be and unprecedented four straight weeks.
View forecast
Sun Valley (Nagano) at 1420 m altitude
Issued by Snow-Forecast.com at: 2 am (local time) / 12 Aug 2026
Now
Next 3 days weather summary:Moderate rain (total 19.0mm), heaviest on Wed morning. Warm (max 22°C on Thu afternoon, min 14°C on Wed morning). Wind will be generally light. | Days 4-6 weather summary:Heavy rain (total 31.0mm), heaviest during Sat afternoon. Warm (max 21°C on Mon morning, min 14°C on Sat night). Wind will be generally light. | |||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | |  | | | | | | | | | |  | |
light rain | light rain | light rain | rain shwrs | rain shwrs | rain shwrs | rain shwrs | t-storm risk | rain shwrs | t-storm risk | t-storm risk | rain shwrs | rain shwrs | t-storm risk | rain shwrs | rain shwrs | t-storm risk | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 3 | 2 | 1 | 1 | 2 | 1 | 1 | 4 | 4 | 3 | 13 | 4 | 1 | 4 | 1 | 1 | 4 | — |
max °C | 15 | 15 | 14 | 20 | 22 | 16 | 22 | 21 | 16 | 20 | 20 | 16 | 20 | 19 | 16 | 21 | 20 | 16 |
min °C | 14 | 14 | 14 | 18 | 17 | 15 | 20 | 18 | 15 | 19 | 17 | 14 | 19 | 18 | 15 | 20 | 18 | 16 |
chill °C | 13 | 13 | 13 | 18 | 17 | 15 | 20 | 18 | 15 | 19 | 17 | 14 | 19 | 18 | 15 | 20 | 18 | 16 |
Humid % | 95 | 93 | 92 | 79 | 59 | 90 | 76 | 75 | 91 | 84 | 80 | 93 | 82 | 86 | 91 | 78 | 80 | 92 |
Freeze m | 4450 | 4450 | 4550 | 4650 | 4600 | 4750 | 4700 | 4750 | 4800 | 4750 | 4800 | 4850 | 4850 | 4900 | 4950 | 5050 | 5100 | 5300 |
 | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — |
 | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
Days 7-16 weather summary:
Interested in the 16-day Forecast? Unlock the full forecast and many more features by becoming a Pro member.
SnowPro
Go pro and carve into:
- Hourly & 16-day snow forecasts
- Fast, ad-free browsing
- Unlock full access on app & web
- Exclusive member discounts
- 20+ years of snow history
- Snow hindcasts
Avalanche information: Japan Avalanche Network
Popular Sun Valley (Nagano) Pages
Snow Radar
Latest snow reports near Sun Valley (Nagano):
Sun Valley (Nagano) Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 9 May 2026 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Nagano are reporting: powder (0) / good piste (0)
Snow-Forecast Partner Offers
Snow History
Week 2 of August has on average:
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. |
Sun Valley (Nagano) Forecast Snowfall
Sign up or Login to accessSnow-Forecast Partner Offers
Photos of Sun Valley (Nagano)
Upload new photo Other resorts in Japan - Nagano are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Sun Valley (Nagano) at the specific elevation of 1420 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.
Visitor Reviews of Sun Valley (Nagano)
Nearest