Weather will likely play an important role when you plan your trip to Campo Grande, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October, with an average temperature of 26°C, while the coldest months are June and July, with an average of 21°C. The rainiest months in Campo Grande are December, January, February and March, with each month seeing an average of 228 mm of rainfall.