Weather is probably a major factor when you plan your trip to Sironko, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March with an average temp of 72°F, while the coldest months are June and July with an average of 69°F. The rainiest months in Sironko are April, May, March, and November, with each month seeing an average of 14 inches of rainfall.