Mount Batur in Bali is basically has tropical weather as it only has sunny and raining seasons, the temperature on the summit is quite hot because it close to the center of the Vulcanic. Although the season is only consist of sunny and raining seasons, it doesn’t means that the mountain can be accessed at any time. You need to consider the season and the weather around the mountain, as climbing the mountain during wet season is quite challenging as the soil is slippery and the rocks are sharp.
Overall, there is no extreme weather changes in mount Batur. Although the weather is close to single number, it never reach 0’c or minus. There is no snow in mount Batur, as the temperature in the summit is warmer as the result of Vulcanic; beside that, the mountain is actually less than 2 hours walk which is considered shorter compare to any Vulcanic mountain in Indonesia.
Storm is rarely occur in mount Batur, as the mountain is far from the sea. In case you arrive in mount Batur during the worse season, you might need to stay in nearby homestays which are provided by local people which might be a best chance to mingle with them. Choosing the right season is the crucial thing in deciding the time of your hiking, especially if you are not familiar with the vicinity. However, the temperature on the surrounding of mount Batur is quite warm, less preparation is needed to take this trip. You only need to bring your jacket and raincoat on your back incase there is sudden shower during the trip.