Hokkaido residents should prepare for a significant shift in weather conditions this weekend, transitioning from unstable, showery conditions to a period of intense heat by early next week. While Saturday will bring localized instability, the following days are set to bring a rapid rise in temperatures that could challenge those not yet accustomed to summer-like conditions.
Saturday, May 30, is expected to be marked by atmospheric instability due to cold air moving in aloft. While there will be sunny intervals, residents should be prepared for sudden rain, particularly in the morning. Thunderstorms and localized heavy rainfall are possible, and those participating in outdoor events, such as school sports days, are advised to monitor the sky for signs of approaching cumulonimbus clouds and seek shelter in sturdy buildings if conditions deteriorate. Winds will also be relatively strong, posing a risk to hats, and umbrellas.
Improving Conditions and Rising Temperatures
The weather is expected to recover on Sunday, May 31, with widespread blue skies and lighter winds. This will likely provide a favorable environment for outdoor activities and leisure. However, as the week begins, the focus will shift to a notable spike in heat. On Monday, June 1, and Tuesday, June 2, temperatures are forecast to be approximately 7 degrees higher than the annual average for this time of year.
In cities such as Sapporo, Asahikawa, and Obihiro, temperatures could reach around 30 degrees Celsius. This level of heat, typical of mid-summer, arrives at a time when the human body has not yet fully acclimated to high temperatures, increasing the risk of heatstroke.
Preparing for the Heat
To manage the body’s response to the upcoming heat, experts emphasize the importance of “heat acclimatization.” This involves conditioning the body to release heat effectively. Simple habits, such as incorporating light exercise like walking, jogging, or cycling into daily routines, or taking warm baths, can help the body practice releasing heat through sweat. When temperatures are high, We see vital to prioritize frequent hydration and rest.

Frequently Asked Questions
What should I watch out for on Saturday, May 30?
Try to prepare for unstable weather with potential localized rain, particularly in the morning. There is a risk of thunderstorms and sudden heavy rain, and winds are expected to be strong.
How will the temperature change early next week?
Temperatures are expected to rise significantly on Monday, June 1, and Tuesday, June 2. In many areas, including Sapporo, Asahikawa, and Obihiro, temperatures will be about 7 degrees higher than the annual average, reaching around 30 degrees Celsius.
What is the recommended approach to preventing heatstroke right now?
It is important to focus on “heat acclimatization” by gradually getting the body used to the heat through light daily exercise or bathing. On hot days, ensure you stay hydrated, take frequent breaks, and wear appropriate clothing.
How are you adjusting your weekend plans to account for the forecasted weather shifts?
