Weather is probably a major factor when you plan your trip to Jiri, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and April, with an average temperature of 19°C, while the coldest months are January and December, with an average of 10°C. The rainiest months in Jiri are July, August, June and September, with each month seeing an average of 779 mm of rainfall.