Planning for the weather is a good way to make your trip to Jama relaxing and enjoyable, especially when you’re splurging. The hottest months are usually November and September with an average temp of 76°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Jama are March, February, January, and April, with each month seeing an average of 20 inches of rainfall.