Weather is probably a major factor when you plan your trip to Gia Nghia, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 20°C, while the coldest months are January and February, with an average of 18°C. The rainiest months in Gia Nghia are May, September, October and July, with each month seeing an average of 442 mm of rainfall.