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Koshi Kogen ski resort snow
Ski Japan - Niigata

Koshi Kogen Snow History

37.31° N 138.89° E

Weather Forecast for Koshi Kogen at 392 m altitude

Issued:
2 am 08 Nov 2026 (local time)
Forecast update in:
 hr.  min.

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

MonthSnow amount (week)Snow days (week)
December35 cm3.1 days
January56 cm4.8 days
February40 cm4.3 days
March11 cm2.0 days
April1 cm0.2 days

Average Snow and Weather Conditions in Koshi Kogen during November (week 2):

The average snowfall forecast during week 2 of November for Koshi Kogen is 0 cm. There are typically 0.1 snowy days during this week. Koshi Kogen normal weather and snow conditions during the second week of November at the middle elevation of the ski area at 392m, based on historical averages over the last 14 years: At this time of year the mean freezing level (2146m) is far above the mid altitude of Koshi Kogen. Snow falls on just one day every 14 years in Koshi Kogen in the middle of November but expect several rainy days. On average there just three dry days during this week each year. In the years when snow falls at this time of year, forecast model average snowfall for the week is 0cm. Typical temperatures are well above freezing both day and night at the mid altitude in Koshi Kogen during week two of November with the average afternoon temperature 10.5°C and the minimum temperature 8.9°C. On average, a couple of days per week will have some sunshine. Generally light winds (average 10km/h) are unlikely to affect lift operations. Based on long term statistics, we don't expect any powder days or any bluebird days at the middle elevation of the ski area of Koshi Kogen at this time of year.


Snow History: Compare Resorts


Compare Koshi Kogen with:

Snow Depths

Recorded snow depths for the upper and lower slopes in Koshi Kogen and (2012 – 2026).

Winter
Summer

Koshi Kogen

 


Lower Slopes
Upper Slopes
Fresh Snow

Average Snow Conditions in

Best ski days per week in Koshi Kogen and (2012 – 2026)

Winter
Summer

Bluebird Powder Day
(Fresh snow, mostly sunny, light wind)
Powder Day
(Fresh snow, limited sun, any wind)
Bluebird Day
(Average snow, mostly sunny, light wind)
Very windy days
(>30km/h)

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.


Average Snowfall in

Graph showing the average precipitation (snow/rain) in Koshi Kogen and (2012 – 2026)

Winter
Summer

Snowfall amount
(bar chart)
Days with significant snowfall.
(>5cm)
Days with significant rainfall.
(>5mm)

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.


Average Temperature in

Graph showing the average temperature and freezing level at Koshi Kogen and (2012 – 2026)

Winter
Summer

Average temperature
Maximum
Minimum
Temperatures
Above freezing
Below freezing
Freezing level
Dashed line

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.