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 temp of 84°F, while the coldest months are June and July with an average of 79°F. The rainiest months in Sobral are March, April, February, and January, with each month seeing an average of 8 inches of rainfall.