Japan is expected to experience highly unstable weather patterns from April 22 through May 4, with atmospheric fronts and low-pressure systems triggering frequent changes in conditions across the country. This volatility comes at a critical time, coinciding with the lead-up to and the duration of the Golden Week holiday period.
Widespread Rain and Safety Warnings
Significant rainfall is anticipated on April 23, as a front settles near Honshu. This system is likely to bring rain to a broad area stretching from Okinawa and Kyushu through to Kanto and southern Tohoku.
Particular caution is advised for regions that recently experienced strong earthquake shaking, including Hachinohe and Iwate, where rain may increase the risk of landslides. Rain is expected to persist in southern Tohoku, Kanto, and Tokai through April 24.
Temporary Weekend Relief
Despite a generally rainy period between April 22 and April 28, a window of clear weather is expected over the weekend. On April 25, high pressure moving east from the Sea of Japan may bring sunshine to the Pacific side of eastern and western Japan.
The warming trend could extend to northern regions, with Sapporo potentially reaching 20°C by Sunday, April 26.
Golden Week Outlook: A Tale of Two Halves
The first half of the Golden Week period, from April 29 to May 4, is likely to be characterized by cloudy skies and rain. Widespread rain is expected from Kyushu to Kanto on April 30, with conditions potentially deteriorating in Hokkaido and Tohoku by May 1.
Conditions are expected to improve during the latter half of the holiday. Tokyo, Nagoya, and Osaka may experience “summer days” with maximum temperatures exceeding 25°C.
While this warmer weather may be favorable for outdoor leisure, the increased intensity of ultraviolet rays suggests that UV protection and heatstroke prevention measures will be necessary.
Frequently Asked Questions
What is the weather forecast for the start of Golden Week?
The first half of Golden Week is expected to be mostly cloudy or rainy. Specifically, widespread rain is forecast for the region from Kyushu to Kanto on April 30, and rain may move into Hokkaido and Tohoku on May 1.
Which areas are at risk for landslides?
Regions where earthquake shaking was strong, such as Hachinohe and Iwate, are advised to be cautious of landslides due to the expected rainfall.
What temperatures are expected for major cities late in the holiday?
Tokyo, Nagoya, and Osaka are expected to see temperatures rise to 25°C or higher, resulting in “summer days” and sweaty weather.
Will you be adjusting your holiday plans to account for the shift from rainy weather to summer heat?
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