Karuizawa Snow Report and Forecast
Updated 16 September 2026 03:40 UTC
Snow Forecast for Karuizawa
Snow and Weather from 16 September.
For Forecast detail, see below.
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Karuizawa Snow Forecast Highlights
When will there be fresh snow in Karuizawa?
| Next Snow? | |
|---|---|
| There is no snow currently in the forecast for Karuizawa. |
Forecast for today in Karuizawa
Max 17℃ 63°F
Min 16℃ 60°F
Valley temperatures from an overnight low of 16℃ 60°F to daytime highs around 17℃ 63°F
Temperature at BaseTemp at Base
Wed
16
Snow unlikely
Light rain early, then cloudy later.
Forecast times for Karuizawa are in Tokyo (Asia/Tokyo) time zone.
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| Wed 16 | Thu 17 | Fri 18 | Sat 19 | Sun 20 | Mon 21 | Tue 22 | |
|---|---|---|---|---|---|---|---|
| Wind | |||||||
| 1,155m 3,789ft | 16℃ 60°F
| 18℃ 64°F
 | 17℃ 62°F
| 20℃ 69°F
| 21℃ 69°F
 | 20℃ 69°F
| 19℃ 67°F
 |
| 1,048m 3,437ft | 17℃ 62°F
| 19℃ 65°F
| 17℃ 63°F
| 21℃ 70°F
| 21℃ 70°F
| 21℃ 70°F
| 20℃ 68°F
|
| 940m 3,084ft | 17℃ 63°F
| 19℃ 67°F
| 18℃ 64°F
| 22℃ 71°F
| 22℃ 72°F
| 22℃ 71°F
| 21℃ 69°F
|
| Snow Line | |||||||
| Max Town | 17℃ 63°F | 19℃ 67°F | 18℃ 64°F | 22℃ 71°F | 22℃ 72°F | 22℃ 71°F | 21℃ 69°F |
| Min Town | 16℃ 60°F | 15℃ 58°F | 13℃ 56°F | 14℃ 56°F | 18℃ 63°F | 19℃ 66°F | 19℃ 66°F |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
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Snow Reliability
Karuizawa typically enjoys reliable snow conditions with an average snow depth of 100 cm during peak season. For the latest snow information, including current conditions and snowfall, check J2Ski for updates.
Understanding and predicting Snow Conditions in Karuizawa
Here are our tips for making the most of a trip to Karuizawa, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Karuizawa, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Karuizawa is uncontrolled and un-marked slopes are not made safe (from avalanche risk) or patrolled. Always check local advice, know the Avalanche Risk Level, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Karuizawa will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Karuizawa for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.