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Happo One Weather (Next 3 days): The snow forecast for Happo One is: A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Thu morning, min -12°C on Fri morning). Winds increasing (light winds from the W on Wed afternoon, fresh winds from the WSW by Thu afternoon).
Happo One Weather (Days 4-6): A heavy fall of snow, heaviest during Sun night. Temperatures will be below freezing (max -2°C on Sun afternoon, min -10°C on Mon afternoon). Winds increasing (calm on Sat afternoon, fresh winds from the W by Sun night).
| Resort | Snow Depth | Temp. (°C) | Wind (km/h) | Weather | ||
|---|---|---|---|---|---|---|
| Top Lift: | 0.9 m | -7 |  | |||
| Middle Lift: | -4 | | ||||
| Bottom Lift: | 0.3 m | -3 | |
Latest snow reports near Happo One:
Rain and snow or hail reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen Ski Resort from Iizuna Kogen
Continuous light rain reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen but it is forecast cold enough for snow at the ski area from Iizuna Kogen
Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  |  |  |  |  | | | | | | |  | |
snow shwrs | snow shwrs | some clouds | some clouds | snow shwrs | heavy snow | mod. snow | light snow | light snow | clear | cloudy | light snow | mod. snow | light snow | heavy snow | light snow | snow shwrs | snow shwrs | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | 2 | — | — | — | 42 | 8 | 4 | — | — | — | 2 | 5 | 4 | 37 | 3 | 1 | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -4 | -5 | -2 | 0 | 0 | -3 | -12 | -11 | -11 | -7 | -7 | -4 | -3 | -2 | -5 | -8 | -8 | -7 |
min °C | -5 | -6 | -4 | -1 | -2 | -11 | -12 | -12 | -12 | -9 | -8 | -7 | -4 | -3 | -8 | -9 | -10 | -9 |
-10 | -10 | -9 | -6 | -9 | -20 | -21 | -20 | -19 | -14 | -8 | -12 | -9 | -10 | -15 | -16 | -17 | -15 | |
72 | 91 | 39 | 35 | 53 | 96 | 90 | 76 | 73 | 61 | 75 | 62 | 95 | 98 | 95 | 88 | 82 | 63 | |
1050 | 1200 | 850 | 1600 | 1850 | 850 | 0 | 0 | 0 | 300 | 700 | 700 | 950 | 1350 | 800 | 650 | 650 | 0 | |
 | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 4:31 | — | — | 4:31 | — | — | 4:31 | — | — | 4:32 | — | — | 4:32 | — | — | 4:32 | — |
A heavy fall of snow, heaviest during Thu night. Temperatures will be below freezing (max 0°C on Thu morning, min -12°C on Fri morning). Winds increasing (light winds from the W on Wed afternoon, fresh winds from the WSW by Thu afternoon).
A heavy fall of snow, heaviest during Sun night. Temperatures will be below freezing (max -2°C on Sun afternoon, min -10°C on Mon afternoon). Winds increasing (calm on Sat afternoon, fresh winds from the W by Sun night).
Latest snow reports near Happo One:
Rain and snow or hail reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen Ski Resort from Iizuna Kogen
Continuous light rain reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen but it is forecast cold enough for snow at the ski area from Iizuna Kogen
| Top snow depth: | 89 cm |
|---|---|
| Bottom snow depth: | 30 cm |
| Fresh snowfall depth: | 12 cm |
| Last snowfall: | 9 Dec 2025 |
| Snow Alerts | Create Alert |
1.4 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
2.5 | Powder days Fresh snow, limited sun, any wind. |
0.6 | Bluebird days Average snow, mostly sunny, light wind. |
The above table gives the weather forecast for Happo One at the specific elevation of 1831 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Happo One. 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.
Overall 3.9 Based on 31 votes and 27 reviews
Unfortunately, 2019/20 is shaping up as the worst season in decades. Happo is a great mountain, but unfortunately, snow conditions are just like back home, icy at the top and wet muck from the middle to bottom, with that famous Japan powder, just something others talk about.
Mick from Australia writes:
Unfortunately, 2019/20 is shaping up as the worst season in decades.
Happo is a great mountain, but unfortunately, snow conditions are just like back home, icy at the top and wet muck from the middle to bottom, with that famous Japan powder, just something others talk about.
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