If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Sarmi: The hottest months are usually October and May with an average temp of 81°F, while the coldest months are July and August with an average of 80°F. The rainiest months in Sarmi are July, April, December, and June, with each month seeing an average of 11 inches of rainfall.