I've been to Bali may times. Stayed in that area for 8 months the first time. No worries about the rain in January. It's lovely all year round, because its so close to the equator. It doesn't have monsoons like in Thailand and other parts of SE Asia. Here's what to exspect in January. Sunny and warm from 6am to around 12-1pm. Then rain from about 1 to 3pm, Sun comes out again and its warm until sunset. Its warm and lovely the whole time. Just duck into the nearest bar or restaurant have a cold drink, and the rains over before you know it