Although weather is just one factor, it can really affect your travel plans, especially if you are planning a longer stay in Gelephu. The hottest months are usually August and April, with an average temperature of 27°C, while the coldest months are January and December, with an average of 20°C. The rainiest months in Gelephu are June, July, August and May, with each month seeing an average of 771 mm of rainfall.