Karuizawa Snow Report and Forecast
Snow Forecast for Karuizawa
This is the Snow and Weather for Karuizawa from 22 January.
Updated 21 January 2026 23:25 UTC.
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Karuizawa.
There is some snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
Karuizawa Snow Forecast Highlights
When will there be fresh snow in Karuizawa?
| Next Snow Expected | 25 January |
|---|---|
| Next Snow Amount | 2cm 1in |
| Next 48 Hours | - - |
| Next 7 Days | 6cm 2in |
Forecast for today in Karuizawa
Max -6℃ 22°F
Min -10℃ 14°F
Below freezing at all levels, with valley temperatures as low as -10℃ 14°F and not getting above -6℃ 22°F
Temperature at BaseTemp at Base
Snowfall
Snow Line
Thu
22
Snow unlikely
Fair early, then clear sky later.
Forecast times for Karuizawa are in Tokyo (Asia/Tokyo) time zone.
Karuizawa has up to 6cm 2in new snow forecast in the next 7 days.*
JMA - at altitude
Karuizawa Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Partner Offers
Karuizawa 7-Day Snow Forecast Overview
Get this snow forecast by e-mail
| Thu 22 | Fri 23 | Sat 24 | Sun 25 | Mon 26 | Tue 27 | Wed 28 | |
|---|---|---|---|---|---|---|---|
| Wind | W F2 | NW F2 | NW F2 | ||||
| 1,155m 3,789ft | -6℃ 22°F
| -1℃ 29°F
| -2℃ 28°F
| -7℃ 20°F
 +2cm +1in
| -6℃ 21°F
 +1cm
| 0℃ 32°F
 | -4℃ 25°F
+1cm
|
| W F2 | NW F2 | NW F2 | |||||
| 1,048m 3,437ft | -6℃ 22°F
| -1℃ 29°F
| -2℃ 28°F
| -7℃ 20°F
+2cm +1in
| -6℃ 21°F
+1cm
| 0℃ 32°F
| -4℃ 25°F
+1cm
|
| W F2 | NW F2 | NW F2 | |||||
| 940m 3,084ft | -6℃ 22°F
| -1℃ 29°F
| -2℃ 28°F
| -7℃ 20°F
+2cm +1in
| -6℃ 21°F
+1cm
| 0℃ 32°F
| -4℃ 25°F
+1cm
|
| Snow Line | 940m 3,084ft | 940m 3,084ft | 940m 3,084ft | 940m 3,084ft | 940m 3,084ft | 940m 3,084ft | |
| Max Town | -6℃ 22°F | -1℃ 29°F | -2℃ 28°F | -7℃ 20°F | -6℃ 21°F | 0℃ 32°F | -4℃ 25°F |
| Min Town | -10℃ 14°F | -10℃ 13°F | -7℃ 19°F | -11℃ 12°F | -11℃ 11°F | -10℃ 13°F | -10℃ 15°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.
Snow Forecast near Karuizawa
| Ski Area | 48 Hr | 7 Day | Th | Fr | Sa | Su | Mo | Tu | We |
|---|---|---|---|---|---|---|---|---|---|
| Kusatsu Onsen | 8cm 3in | 12cm 5in |
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.