Planning for the weather is a good way to make your trip to Arua relaxing and enjoyable, especially when you’re splurging. The hottest months are usually February and January with an average temp of 79°F, while the coldest months are August and July with an average of 72°F. The rainiest months in Arua are October, September, August, and July, with each month seeing an average of 9 inches of rainfall.