Planning for the weather is a good way to make your trip to Sobral relaxing and enjoyable, especially when you're splurging. The hottest months are usually October and September, with an average temperature of 29°C, while the coldest months are June and July, with an average of 26°C. The rainiest months in Sobral are March, April, February and January, with each month seeing an average of 209 mm of rainfall.