Climate and monthly weather forecast
Toyama, Japan

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The climate of Toyama

Recognized within the Köppen climate classification as Cfa, Toyama in Japan enjoys a humid subtropical climate with no distinct dry season. Its geographical position on the coast, coupled with surrounding mountainous terrain, influences its climatic conditions, ushering in heavy snowfall in winter due to the phenomenon known as the "Sea of Japan winter weather front".

Throughout the year, daylight hours range from a low of 9.7 hours in December to a high of 14.6 hours in June. This 4.9-hour difference reflects the city's temperate location well north of the equator.

The sea temperature experiences a fluctuation of approximately 16.2°C (61.2°F), from a chilling 10.8°C (51.4°F) in March to a warm 27°C (80.6°F) in August. This significant variation plays a massive role in the coastal city's weather patterns, affecting decreases and increases in coastal temperatures and influencing rain patterns across different seasons.

A significant climatic attribute of Toyama is the absence of a dry season. This constant availability of rainfall contributes to the high humidity levels the city experiences, making it a humid subtropical climate region.

The best time to visit Toyama

Considering various weather parameters, the optimum time to visit Toyama is between late spring and early summer (May to July). During this period, sea temperatures rise from a moderate 15.4°C (59.7°F) to a warm 24.8°C (76.6°F), fostering pleasant and calm coastal weather. Daylight is ample in these months, averaging between 14.1 hours to 14.6 hours, maximizing the time tourists have to explore the city.

The worst time to visit Toyama

The period from December to February, while having its charm in terms of snowfall, is quite chilly, with sea temperatures plunging to lows of 10.8°C (51.4°F) to 13.2°C (55.8°F). Daylight hours shrink to a bare minimum of 9.7 hours to 10 hours. The combination of these factors makes this time less appealing for visitors, although it could be an attractive period for winter sports enthusiasts.

Spring weather in Toyama

Spring in Toyama, ranging from March to May, brings increasing temperatures in terms of both sea and air. The sea temperature sees a significant rise from 10.8°C (51.4°F) to 15.4°C (59.7°F), a welcome change after the chill of winter. Daylight visibly increases, reaching an admirable average of 14.1 hours by May.

Summer weather in Toyama

Summers in Toyama, between June and August, offer the warmest sea temperatures ranging from 24.8°C (76.6°F) to 27°C (80.6°F). The ample daylight, which peaks at 14.6 hours in June, provides ample time for outdoor activities during the day.

Autumn weather in Toyama

Autumn, spanning September to November, sees a gradual decrease in sea temperatures from a warm 25.5°C (77.9°F) to a more moderate 18.6°C (65.5°F). The daylight hours contract notably from 12.4 hours to 10.2 hours, indicating the transition towards the colder winter months.

Winter weather in Toyama

Winter, from December to February, is characterized by the cold sea, with temperatures plummeting from 15.2°C (59.4°F) to 10.8°C (51.4°F). The shortened daylight hours of 9.7 to 10 hours provide a much shorter window of natural light during the day for outdoor activities. However, the heavy snowfall experienced during this period can be a significant attraction for winter sports lovers.

Weather in January

The New Year in Toyama, Japan begins with cold temperatures dominating the weather pattern, with icy winds often reaching the coastal city. While the sea temperature holds an average of 13.2°C (55.8°F), it does not considerably warm the city's winter environment. Weather in January »

Weather in February

February maintains the cold weather pattern of January, intensifying Toyama's winter conditions with even colder sea temperatures. The sea temperature drops to an average of 11.2°C (52.2°F), reinforcing the city’s winter chill. Weather in February »

Weather in March

March signals the end of Toyama's coldest weather and the start of a gradual climb in temperatures toward Spring. The weather is marked by cold sea temperatures, averaging at 10.8°C (51.4°F), the coldest point within the entire year. Weather in March »

Weather in April

April in Toyama presents a significant variation compared to March’s weather conditions. On average, the sea temperature sees an uptake to 12.4°C (54.3°F). With longer daylight hours and warmer weather, April sets the stage for the blooming cherry blossoms in Toyama. Weather in April »

Weather in May

May is when the warmer weather becomes more noticeable in Toyama, marking a transition from Spring into Summer. Coastal warmness is reinforced by the sea temperature that has now increased to an average of 15.4°C (59.7°F). The increasing daylight hours further amplify the perceived warmth of the city. Weather in May »

Weather in June

June's weather is characterized by extensively longer days and a palpable warmth as Toyama enters its summer period. The sea temperature continues to rise dramatically, peaking at an average of 20.3°C (68.5°F). This makes June markedly different from May. Weather in June »

Weather in July

Toyama’s biggest summer heat arrives in July, with the weather conditions significantly influenced by the warm sea temperatures. The sea reaches its warmest point, with a temperature averaging at 24.8°C (76.6°F). Despite this, the transition between June and July is mostly swept by the sea, with only minimal changes in daylight hours. Weather in July »

Weather in August

August shares similar weather characteristics as July, maintaining Toyama’s summer heat. The sea temperature increases marginally and reaches the highest point of the year, averaging at 27°C (80.6°F). The deviation from July to August is almost negligible, maintaining the dominance of summer weather. Weather in August »

Weather in September

September marks a shift from the hot summer months to the cooler autumnal conditions of Toyama. The sea temperature drops slightly to an average of 25.5°C (77.9°F), introducing the city's transition to the autumn season. This is a marked contrast from August and is a signal for the changes the following month will bring. Weather in September »

Weather in October

In Toyama, October is a clear sign that Summer is ending and Autumn is taking over. There is no dramatic swing in weather between September and October, allowing for a calm transition into autumn. An interesting contrast from September, is the sea temperature which sees a more drastic drop to 21.7°C (71.1°F). Weather in October »

Weather in November

November in Toyama highlights the serenity of Autumn, with the city’s weather gently preparing for winter. The sea temperature continues its downward trend, averaging at 18.6°C (65.5°F), symbolizing the definitive end of warmer months. Weather in November »

Weather in December

December brings Toyama full circle to its winter period. The sea temperature descends to 15.2°C (59.4°F) as Toyama embraces the year-end chill. The dramatic shift between November and December sets the tone for a cool year-end. Weather in December »
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Frequently asked questions

When is the sea coldest in Toyama?

With an average sea temperature of 10.8°C (51.4°F), March is the month with the coldest seawater.

When are the longest days in Toyama?

June has the longest days of the year, with an average of 14h and 36min of daylight.

What is the month with the warmest sea water in Toyama?

The month with the warmest seawater in Toyama, Japan, is August, with an average sea temperature of 27°C (80.6°F).

What is the month with the shortest days in Toyama?

December has the shortest days of the year in Toyama, with an average of 9h and 42min of daylight.

Is there Daylight Saving Time (DST) in Toyama?

Toyama, Japan, does not observe Daylight Saving Time (DST). JST timezone is used over the entire year.

Average sea temperature
Toyama, Japan

Average sea temperature - Toyama, Japan

The best month for swimming (with the highest average sea temperature) is August (27°C).
The coldest month (with the lowest average sea temperature) is March (10.8°C).

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Average daylight
Toyama, Japan

Average daylight - Toyama, Japan

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

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Toyama, Japan

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