Spring (March-May)
Temperatures start to increase in the later March, reaching around 15 degrees Celsius in April. Winter clothing such as coats are no longer necessary.
In May, temperatures hover around 18 degrees Celsius and plants start blooming as the air temperature increases.
Transplanting of rice seedlings, rice being the staple food in Japan, begins around May.
Summer (June-September)
A rainy front stays around Japan in June, increasing humidity and bringing considerable amounts rain, it is called "rainy season" and this weather continues approximately one and a half months.
Rainy season ends around the middle July, then full-fledged summer begins.
In August, there are often consistently hot days with temperatures climbing to over 35 degrees Celsius.
There is no rainy season in Hokkaido.
Autumn (End September-November)
Once entering in autumn, day length starts to shrink and the sun sets earlier.
As the summer heat wanes; this is a comfortable season to spend outdoors.
However, a lot of typhoons approach Japan until the beginning of October in this season and caution is required.
In November, the autumn leaves appear nationwide.
Exquisite colors can be observed across the country due to the climate shifting from summer to autumn.
Snow starts to fall in the mountainous areas.
Winter (End November-February)
The atmospheric pattern of the western high and eastern low, characteristic weather of this season, brings a strong stream of cold air flows from northwest.
Snow falls in Hokkaido, the Japan sea side, and regions located inland and in the mountains.
In places enduring heavy snowfall, sometimes depths of over four meter of snow are recorded.
On the Pacific Ocean side, there are many clear days, and the air becomes dry.
