South American Ski Area Extends Season After Huge Snowfalls
Chile’s Portillo ski area has announced it is extending its 2026 season by several week into mid-October after massive snowfalls over the past month.
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Chestnut Mountain at 317 m altitude
Issued by Snow-Forecast.com at: 12 am (local time) / 19 Aug 2026
Now
Next 4 days weather summary:Moderate rain (total 10.0mm), heaviest on Thu night. Warm (max 26°C on Fri afternoon, min 16°C on Wed night). Wind will be generally light. | Days 5-7 weather summary:Mostly dry. Warm (max 25°C on Sat morning, min 16°C on Sat night). Wind will be generally light. | |||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  | | | | |  | |  | | |
t-storm risk | some clouds | some clouds | clear | clear | some clouds | rain shwrs | t-storm risk | t-storm risk | clear | clear | clear | some clouds | some clouds | cloudy | clear | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 2 | — | — | — | — | — | 4 | 2 | 2 | — | — | — | — | — | — | — |
max °C | 20 | 23 | 22 | 18 | 23 | 24 | 19 | 24 | 26 | 20 | 25 | 25 | 21 | 24 | 24 | 20 |
min °C | 17 | 20 | 21 | 16 | 20 | 22 | 17 | 21 | 24 | 18 | 22 | 24 | 16 | 20 | 22 | 17 |
chill °C | 17 | 20 | 21 | 16 | 20 | 22 | 17 | 21 | 24 | 18 | 22 | 24 | 16 | 20 | 22 | 17 |
Humid % | 88 | 68 | 50 | 62 | 58 | 49 | 84 | 83 | 69 | 86 | 69 | 61 | 77 | 62 | 62 | 86 |
Freeze m | 3950 | 3750 | 3900 | 3750 | 3850 | 4050 | 4150 | 4000 | 4200 | 4250 | 3850 | 3900 | 4300 | 4150 | 4200 | 4450 |
 | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — |
 | — | — | 7:57 | — | — | 7:54 | — | — | 7:53 | — | — | 7:52 | — | — | 7:51 | — |
Days 7-16 weather summary:
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Avalanche information: National Avalanche Center
Popular Chestnut Mountain Pages
Snow Radar
Latest snow reports near Chestnut Mountain:
Chestnut Mountain Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 17 Mar 2026 |
| Snow Alerts | Create Alert |
Other resorts in USA - Illinois are reporting: powder (0) / good piste (0)
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Snow History
Week 3 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. |
Chestnut Mountain Forecast Snowfall
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Other resorts in USA - Illinois are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Chestnut Mountain at the specific elevation of 317 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Chestnut Mountain. 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 United States.
Click here to read further information on freezing levels and how we forecast our temperatures.
Visitor Reviews of Chestnut Mountain
- Juan from Spain writes:
I was at Chestnut Mountain just once. It was the only resort I had close enough from work (Lena, IL). I ski there last Dec. 2nd 2008, and got the early season special "the date is the price" so I ski for $2 (cheapest I ever had). First thing I can say is that the views of the Mississipi river are just amazing. With a nice ski rental service and good lifts you can enjoy of the resort with no complain. The runs are short but, in some of the cases, real black ones. So even though it is a little resort, the well prepared runs have 100% snow making and lights. I could say it is a nice place to stop by if you are in the area, you'll get surprised.
Visitor Reviews of Chestnut Mountain
Juan from Spain writes:
I was at Chestnut Mountain just once. It was the only resort I had close enough from work (Lena, IL). I ski there last Dec. 2nd 2008, and got the early season special "the date is the price" so I ski for $2 (cheapest I ever had).
First thing I can say is that the views of the Mississipi river are just amazing.
With a nice ski rental service and good lifts you can enjoy of the resort with no complain. The runs are short but, in some of the cases, real black ones. So even though it is a little resort, the well prepared runs have 100% snow making and lights. I could say it is a nice place to stop by if you are in the area, you'll get surprised.
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