If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Jamundi: The hottest months are usually August and July with an average temp of 70°F, while the coldest months are January and July with an average of 69°F. The rainiest months in Jamundi are November, April, December, and October, with each month seeing an average of 12 inches of rainfall.