Japan is a country that boasts of four seasons, and each season has something wonderful to offer. For those wondering when is cherry blossom season in Japan, here’s a brief overview of the climate, seasons, and weather in Japan. You'll also see some tips about where to go and what to do during each season.
www.jal.co.jp/au/en/guide-to-japan/plan-your-trip/tips/the-climate-seasons-and-weather-in-japan.html
Japan in April to May: Spring (temperature range: 2°-24°C) If you want to see the flowers in bloom, travel in the spring (April-May). On average, the temperature remains cool (21°C), and a light coat is enough in cities like Tokyo and Osaka. Up north in places like Sapporo, it can get as low as 2°-10°C.
The summer season starts with rain in June, while most of July and a little of August are characterized by hot and humid days. Most visitors visiting Japan around this time head to the beaches, lakes, and rivers.
Autumn in Japan is about crimson leaves and perfect weather. As summer transitions to autumn, Japan begins to cool down, offering temperate weather that's perfect for outdoor walks. From mid-November to early December, the trees turn vivid hues of red, orange, and yellow.
Generally, winter lasts from December to February. With the rainy season long over most of Japan is sunny and dry, but temperatures vary by region. In Tokyo, daily highs reach 12°C (54°F) in December but fall to 5° (41°) in the mornings and evenings.