Karuizawa Snow Report and Forecast
Snow Forecast for Karuizawa
When will there be fresh snow?
This is the Snow Forecast for Karuizawa, Japan for 16 days from 3 July.
Updated 03 July 2025 04:33 UTC.
| Next Snow? | |
|---|---|
| There is no snow currently in the forecast for Karuizawa. |
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Karuizawa.
Forecast for today in Karuizawa
Max 26℃ 79°F
Min 19℃ 65°F
Valley temperatures from an overnight low of 19℃ 65°F to daytime highs around 26℃ 79°F
Temperature at BaseTemp at Base
Thu
03
Snow unlikely
Fair first, rain showers then cloudy, fair later.
Karuizawa has no new snow forecast in the next 48 hours.
Karuizawa Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Karuizawa 7-Day Snow Forecast Overview
Get this snow forecast by e-mail
| Thu 03 | Fri 04 | Sat 05 | Sun 06 | Mon 07 | Tue 08 | Wed 09 | |
|---|---|---|---|---|---|---|---|
| Wind | |||||||
| 1,155m 3,789ft | 26℃ 79°F
| 26℃ 79°F
 | 25℃ 78°F
| 28℃ 83°F
| 27℃ 81°F
 | 26℃ 78°F
| 28℃ 83°F
|
| 1,048m 3,437ft | 26℃ 79°F
| 26℃ 79°F
| 25℃ 78°F
| 29℃ 84°F
| 28℃ 82°F
| 27℃ 80°F
| 29℃ 84°F
|
| 940m 3,084ft | 26℃ 79°F
| 26℃ 79°F
| 25℃ 78°F
| 30℃ 86°F
| 29℃ 84°F
 | 28℃ 81°F
| 30℃ 86°F
|
| Snow Line | |||||||
| Max Town | 26℃ 79°F | 26℃ 79°F | 25℃ 78°F | 30℃ 86°F | 29℃ 84°F | 28℃ 81°F | 30℃ 86°F |
| Min Town | 19℃ 65°F | 18℃ 64°F | 20℃ 67°F | 21℃ 70°F | 21℃ 69°F | 21℃ 70°F | 20℃ 69°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.
Karuizawa Medium-Range (7-Day) Snow Forecast Detail
Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.
Max 26℃ 79°F
Min 19℃ 65°F
Valley temperatures from an overnight low of 19℃ 65°F to daytime highs around 26℃ 79°F
Temperature at BaseTemp at Base
Thu
03
Snow unlikely
Fair first, rain showers then cloudy, fair later.
Max 26℃ 79°F
Min 18℃ 64°F
Valley temperatures from an overnight low of 18℃ 64°F to daytime highs around 26℃ 79°F
Temperature at BaseTemp at Base
Fri
04
Snow unlikely
Fair first, light drizzle then cloudy, fair later.
Max 25℃ 78°F
Min 20℃ 67°F
Valley temperatures from an overnight low of 20℃ 67°F to daytime highs around 25℃ 78°F
Temperature at BaseTemp at Base
Sat
05
Snow unlikely
Fair, rain showers, cloudy later.
Max 30℃ 86°F
Min 21℃ 70°F
Valley temperatures from an overnight low of 21℃ 70°F to daytime highs around 30℃ 86°F
Temperature at BaseTemp at Base
Sun
06
Snow unlikely
Cloudy early, then clear spells later.
Max 29℃ 84°F
Min 21℃ 69°F
Valley temperatures from an overnight low of 21℃ 69°F to daytime highs around 29℃ 84°F
Temperature at BaseTemp at Base
Mon
07
Snow unlikely
Cloudy early, then fog later.
Max 28℃ 81°F
Min 21℃ 70°F
Valley temperatures from an overnight low of 21℃ 70°F to daytime highs around 28℃ 81°F
Temperature at BaseTemp at Base
Tue
08
Snow unlikely
Clear spells, light rain showers, fog later.
Max 30℃ 86°F
Min 20℃ 69°F
Valley temperatures from an overnight low of 20℃ 69°F to daytime highs around 30℃ 86°F
Temperature at BaseTemp at Base
Wed
09
Snow unlikely
Clear spells early, then fair later.
No significant snowfall is forecast for this period.
This Snow Forecast for Karuizawa, Japan gives the predicted Snowfall and Freezing Levels for the next week.
The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Karuizawa, on any given piste or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.
Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.
Karuizawa Snow Forecast updated at 04:33 UTC, next update expected imminently.
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.