Japan will experience widespread sunny skies from Kyushu to Hokkaido on Sunday, May 10, the Japan Meteorological Agency said [1].

This forecast is significant for millions of residents and travelers as the transition to warmer spring temperatures brings strong ultraviolet radiation and varying regional weather extremes.

A high-pressure system is dominating the country, leading to clear conditions across most prefectures [1]. However, the weather remains volatile in specific regions. Livedoor News said that parts of Hokkaido may experience localized heavy snow [2]. The publication said that heavy snow and blizzards could cause transportation disruptions in those areas [2].

Temperatures are expected to range from the low 20s to mid-20s degrees Celsius [1]. In the north, Sapporo is forecast to reach a high of 21 °C [1], while Kushiro will see 19 °C [1]. Aomori is expected to hit 22 °C [1], and Morioka 21 °C [1].

Central and southern regions will see slightly warmer conditions. Sendai is forecast to reach 25 °C [1], while Niigata will hit 21 °C [1]. Tokyo is expected to reach 24 °C [1], and Osaka 25 °C [1]. Multiple locations, including Nagoya and Fukuoka, are also expected to see temperatures of 25 °C or higher [1].

While most of the country enjoys the sun, northern Japan may experience breezy conditions [1]. In the far south, a frontal boundary is affecting the weather in Okinawa, where intermittent rain is expected [1]. Naha is forecast to have a high of 23 °C [1].

Authorities said citizens should take precautions against strong UV radiation during the sunny intervals [1].

“Japan will experience widespread sunny skies from Kyushu to Hokkaido on Sunday, May 10.”

The contrast between 25 °C highs in Osaka and potential heavy snow in Hokkaido illustrates the extreme climatic variance across the Japanese archipelago during May. While the dominating high-pressure system suggests a general trend toward summer, the localized snow warnings indicate that winter-like conditions persist in the north, requiring coordinated regional transport alerts.