Is Koshi Kogen snowsure?
The snowiest week in Koshi Kogen is week 4 of January. There are typically 4.6 snowy days during this week with 64 cm of snowfall. Check out the Koshi Kogen Snow History graphs below. Select any week of the year to see the typical Ski Conditions, Snowfall Amount and Temperature based on nowcast weather data over the last 11 years.Average monthly snow in Koshi Kogen
| Month | Snow amount (week) | Snow days (week) |
|---|---|---|
| December | 35 cm | 3.1 days |
| January | 56 cm | 4.8 days |
| February | 40 cm | 4.3 days |
| March | 11 cm | 2.0 days |
| April | 1 cm | 0.2 days |
Average Snow and Weather Conditions in Koshi Kogen during September (week 4):
The average snowfall forecast during week 4 of September for Koshi Kogen is 0 cm. There are typically 0.0 snowy days during this week. Koshi Kogen normal weather and snow conditions during the last week of September at the middle elevation of the ski area at 392m, based on historical averages over the last 13 years: At this time of year the usual freezing level (4109m) is a long way above the middle elevation of Koshi Kogen. Snowy weather is unlikely in Koshi Kogen at the end of September but on average there are three days during this week each year when it rains Warm day temperatures in Koshi Kogen during week four of September. The average temperature extremes are between 18.4°C and 20.3°C at the middle elevation. Expect the sun to come out on two or three days per week. Generally light winds (average 7km/h).
Snow History: Compare Resorts
Koshi Kogen Snow Depths
Recorded snow depths for the upper and lower slopes in Koshi Kogen and (2012 – 2026).
The most cherished days on the mountain in Koshi Kogen are Bluebird Powder days when it is mostly sunny with light winds following very recent snowfall. Poorer weather conditions may prevail on Powder days when the visibility can be limited but the snow is significantly deep and fresh for keen powder-hounds. Bluebird days can suit many skiers that aren’t necessarily hunting powder but want to enjoy the snowy mountains in sunnier conditions and light winds.
The snowiest weeks of the year in Koshi Kogen are shown but also bear in mind the number of days that it typically snows each week if you want regular fresh tracks. The risk of a rainy day is shown but be sure to switch between elevations to see if lower lifts are rain affected or higher lifts remain snowy despite any rain further down the mountain.
The highest and lowest temperatures averaged for each week of the year in Koshi Kogen are shown. Check out the risk of freze-thaw conditions prevailing at different elevations for any given week. We also show the extremes of temperature (blue/red dots) that reveal the chance of unusually warm or cold conditions.





