Top 10 Snowiest Cities in Japan (Annual Snowfall & School Closure Risk)

Japan is home to some of the snowiest cities in the world, with annual snowfall reaching up to 8 meters in certain regions. From Hokkaido in the north to the Sea of Japan coastline, heavy winter storms regularly impact daily life, transportation, and especially school operations. If you’re looking to predict snow days, calculate school closing chances, or determine whether it’s safe to travel, understanding snowfall trends in Japan’s snowiest cities is essential. Below, we list the top 10 snowiest cities in Japan and explain how snowfall percentage affects school safety, road conditions, and outdoor activities — plus how our Snow Day Predictor tool can help you plan smarter.

Japan Snowfall Comparison Table (All 10 Cities)

1) Aomori

Aomori, located in Aomori Prefecture, is widely recognized as Japan’s snowiest major city, averaging nearly 792 cm annually. Its location along the Sea of Japan exposes it to powerful winter systems formed by cold Siberian air masses picking up moisture before releasing heavy snow over the region.

Snow season usually begins in late November and can last until early April, creating one of the longest and most intense winters in the country. The city records more than 110 snow days annually, and snow depth on the ground often exceeds 1.5 to 2 meters during peak months.

Heavy overnight snowfall is common, sometimes depositing 15–25 cm in just a few hours. Despite strong snow-clearing infrastructure, morning commutes can become slow and hazardous due to compacted snow and black ice.

When snowfall probability remains below 30%, commuting and school attendance are generally safe, though caution is still necessary. Between 40–60%, traffic delays and slippery road conditions become more frequent. Once snowfall probability exceeds 70%, school closures and schedule adjustments become highly likely, especially after major nighttime accumulation.

2) Sapporo

Sapporo, capital of Hokkaido, averages 485 cm per year and hosts the globally famous Sapporo Snow Festival. Located in Hokkaido, the city experiences long winters that typically begin in December and continue through March.

Cold air masses moving across the Sea of Japan gather moisture and release consistent snowfall over the region. Despite the heavy snow totals, Sapporo is well equipped with advanced snow-clearing systems, underground heating in key walkways, and organized road maintenance.

Snowstorms can still produce rapid overnight accumulation of 20–30 cm, which slows morning traffic and public transportation. Compacted snow and freezing temperatures often create slippery intersections during peak winter months. When snowfall probability remains below 30%, commuting and school attendance are generally safe due to efficient infrastructure.

Between 45–65%, delays become more common as road-clearing operations take time. Once snowfall probability exceeds 75%, especially after heavy overnight snowfall, school closures and schedule adjustments become more likely.

Although residents are accustomed to harsh winters, sudden storm intensity can still disrupt daily routines. Monitoring snowfall trends and overnight accumulation is essential during peak winter periods in Sapporo.

3) Yamagata

Yamagata, situated in the Tohoku region, records over 426 cm annually due to intense Sea of Japan snowbands. The city is heavily influenced by cold Siberian air masses that collide with moisture from the Sea of Japan, producing intense and steady snowfall throughout winter. Snow season typically begins in November and can extend into early April, with consistent accumulation during peak months.

Snow in Yamagata often falls in strong bursts, leading to rapid overnight buildup that affects morning transportation. Roads can quickly become covered in compact snow and ice, increasing the risk of slipping and reduced vehicle control. When snowfall probability stays below 30%, commuting and school attendance are generally manageable with proper winter precautions.

At around 50%, driving conditions worsen significantly due to icy intersections and limited visibility. Once snowfall probability rises above 70%, school cancellations become more common, particularly in suburban and rural districts where bus routes are harder to maintain.

Because snowfall intensity can vary depending on elevation and proximity to mountainous terrain, local conditions may differ within short distances. Residents are accustomed to heavy snow, but preparation remains essential during peak storm periods.

4) Toyama

Toyama, along the Sea of Japan coast, averages 363 cm yearly and is known for wet, heavy snowfall. Its position along the Sea of Japan makes it highly exposed to moisture-laden winter winds that generate dense and persistent snowfall.

Snow season generally runs from December through March, though early storms can begin in late November. Unlike lighter powder snow in some northern areas, Toyama’s snowfall is often wet and heavy, which increases road slush and structural load concerns.

Snow can accumulate quickly during strong coastal storm systems, sometimes adding 15–20 cm overnight. This rapid buildup frequently impacts morning traffic, especially on secondary roads and suburban routes. When snowfall probability remains below 30%, commuting and school operations are usually safe with basic winter precautions.

Between 45–60%, caution becomes necessary as heavy snow and reduced visibility slow transportation. Once snowfall probability exceeds 70%, school delays or closures become more likely, particularly after significant nighttime accumulation.

5) Asahikawa

Asahikawa receives about 3.5 meters (350 cm / 138 inches) of snowfall annually. Located in central Hokkaido, the city experiences long winters that typically begin in November and continue into April. What makes Asahikawa unique is not just the snowfall amount, but the extreme cold, with temperatures often dropping below -20°C during peak winter months.

Snowfall in Asahikawa is usually dry and powdery, but freezing conditions quickly turn packed snow into hard, slippery surfaces. Overnight accumulation of 10–20 cm can significantly slow morning transportation. When snowfall probability remains under 30%, commuting and school attendance are generally manageable, though icy roads require caution.

Between 50–60%, accident risk rises due to reduced traction and limited visibility during snow showers. Once snowfall probability exceeds 75%, especially when combined with severe cold warnings, school closures become much more frequent.

Because of the combination of heavy snow and extreme low temperatures, winter preparedness is essential in Asahikawa. Residents monitor forecasts closely, as even moderate snowfall can create hazardous conditions when temperatures remain far below freezing.

6) Niigata

Niigata is known for its heavy and sometimes unpredictable winter snowfall, averaging between 2.5 and 3 meters (250–300 cm / 98–118 inches) annually. The city is directly exposed to moisture-filled winter winds that generate strong snowbands throughout the season. Snowfall typically begins in December and continues through March, though peak accumulation often occurs in January and February.

One of Niigata’s defining features is rapid overnight accumulation, where 15–25 cm of snow can fall within a few hours. This sudden buildup frequently impacts early morning commutes and school transportation routes. Roads can quickly become layered with compact snow, reducing traction and increasing travel time.

When snowfall probability remains below 35%, daily commuting and school attendance are generally safe. Between 50–65%, delays become more common due to slower road clearing and bus route safety concerns. Once snowfall probability rises above 70%, school closures become increasingly likely, particularly after substantial nighttime snowfall.

Because winter storms can intensify quickly in Niigata, residents often monitor weather updates closely. Preparation is key, as conditions can shift from manageable to disruptive within a short period of time.

7) Akita

Akita receives approximately 2.7 meters (272 cm / 107 inches) of snowfall each year, making it one of the snow-heavy cities along Japan’s Sea of Japan coastline. Winter usually begins in December and lasts through March, with steady snowfall throughout the season.

Cold air masses moving from Siberia collect moisture over the sea and release consistent snow bands across the region. Coastal winds can intensify storms, sometimes creating brief whiteout conditions that reduce visibility on open roads.

Snow in Akita tends to accumulate gradually, forming compact layers that turn icy as temperatures remain near or below freezing. Rural districts and elevated areas often experience deeper accumulation than central urban zones. When snowfall probability stays below 30%, commuting and school attendance are generally safe with standard winter precautions.

Between 50–60%, road visibility decreases and driving hazards increase due to packed snow and icy intersections. Once snowfall probability exceeds 70%, school closures become more likely, particularly in districts dependent on bus transportation and rural road access.

Because winter weather in Akita is steady rather than sudden, residents are accustomed to prolonged snow cover. However, preparation and close monitoring remain important during stronger storm systems that can escalate quickly.

8) Nagano

Nagano receives between 1.6 to 2 meters (160–200 cm / 63–79 inches) of snowfall annually, though surrounding mountainous regions often record significantly higher totals. Located in central Japan and surrounded by the Japanese Alps, the city’s elevation and terrain play a major role in winter weather patterns. Snow season typically begins in December and continues through March, with colder nighttime temperatures helping snow remain on the ground for extended periods.

While snowfall in the city center is moderate compared to northern regions, nearby higher elevations can experience rapid accumulation and heavier storm activity. Snow can build up steadily over several days, creating compact layers that turn icy during freezing mornings.

When snowfall probability remains below 30%, commuting and school attendance are generally safe. Around 50%, school officials often begin monitoring overnight accumulation and road clearing progress. Once snowfall probability reaches 65–70% or higher, delays or closures become more likely depending on district location and transportation routes.

Because snowfall intensity varies with altitude, conditions can differ noticeably between neighborhoods. Residents stay alert during peak winter months, as mountain-influenced weather systems can strengthen quickly and impact travel safety.

9) Fukushima

Fukushima receives an average of 1.5 to 1.8 meters (150–180 cm / 59–71 inches) of snowfall each year, although totals vary significantly across the prefecture. Western mountainous areas typically experience heavier accumulation, while central urban zones receive more moderate snowfall.

Winter generally begins in December and lasts through March, with colder air systems moving inland and producing steady snow events. Elevation and geography play an important role in how much snow different districts receive.

Snow in Fukushima often accumulates gradually rather than in extreme bursts, but overnight snowfall of 10–20 cm can still disrupt morning transportation. Packed snow and icy road surfaces increase driving hazards, especially in rural areas with limited snow-clearing resources.

When snowfall probability remains below 30%, commuting and school attendance are usually safe with winter precautions. Between 50–60%, travel risks increase due to reduced traction and slower road clearing. Once snowfall probability exceeds 70%, school closures become more common in rural districts where bus routes are affected first.

Because snowfall intensity differs between urban and mountainous areas, residents often rely on localized forecasts to assess risk. Even moderate storms can create challenges when temperatures remain consistently below freezing.

10) Kanazawa

Kanazawa, located in Ishikawa Prefecture, averages 140–160 cm of dense, moisture-heavy snowfall annually. Located along the Sea of Japan, the city is influenced by moisture-rich coastal weather systems that produce dense and heavy snowfall. Unlike the dry powder found in colder northern cities, snow in Kanazawa is often wet and compact, which increases the risk of slippery road surfaces.

Storm systems can occasionally deliver 10–20 cm of snow overnight, impacting morning commutes and school transportation routes. When snowfall probability remains below 30%, outdoor travel and school attendance are generally safe with normal winter precautions. Around 50%, caution becomes necessary as wet snow accumulates and traffic slows significantly.

Once snowfall probability exceeds 70%, school delays or closures become more possible, particularly after strong coastal storms that deposit heavy snow in a short period.

Because Kanazawa’s snowfall is moisture-heavy, melting and refreezing cycles can create icy layers on untreated roads. Residents closely monitor winter forecasts, as coastal storm intensity can increase quickly and affect travel safety across the city.

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