The best time to climb Kilimanjaro is during the months of January, February, June, July, August, September, October and December. All of the above months tend to be the busiest times on Kilimanjaro. It is the high season for tourism.
Because Tanzania lies near the equator, the area does not have four seasons like most other countries. Instead there are two seasons – wet and dry. The temperature does vary but does not have the large swings that most people are accustomed to.
The only times that should be avoided are during Tanzania’s two rainy seasons. The long rainy season is from the end of March to the beginning of June and the short rainy season is from November to the beginning of December. Even during the “dry” seasons, climbers may still experience heavy rains. The mountain’s weather is unpredictable. Always be prepared for cold and rain.