You might spend a lot of your holiday inside, but if you're planning to venture beyond the casino, looking at local weather trends is a good idea. The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are January and February, with an average of 5°C. The rainiest months in Higashihiroshima are July, June, August and September, with each month seeing an average of 260 mm of rainfall.