Visiting local bars in Karimun is more fun in good weather. These rainfall averages and temperatures can help you choose the best time for bar hopping. The hottest months are usually May and April with an average temp of 83°F, while the coldest months are January and February with an average of 81°F. The rainiest months in Karimun are November, December, May, and April, with each month seeing an average of 13 inches of rainfall.