Visiting local bars in Izu is more fun when you know what the weather holds. These rainfall averages and temperatures can help you choose the best time for bar-hopping. The hottest months are usually August and July, with an average temperature of 24°C, while the coldest months are January and February, with an average of 8°C. The rainiest months in Izu are July, September, June and October, with each month seeing an average of 361 mm of rainfall.