Weather is probably a major factor when you plan your trip to Lang Co, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 22°C. The rainiest months in Lang Co are November, October, September and December, with each month seeing an average of 475 mm of rainfall.