24/7 Golf Talk & Play-by-Play. Matt AdamsMatt Adams is a New York Times and USA Today best-selling author, Golf Channel reporter, columnist and golf industry veteran. Matt started his career at ESPN, then moved on to the golf industry, where he worked in golf equipment manufacturing and continues to consult on golf course operations.
Days 0-3 Mount San Jacinto Peak Weather Summary: Mostly dry. Mild temperatures (max 5Â°C on Mon afternoon, min 3Â°C on Mon morning). Winds increasing (moderate winds from the WSW on Sun morning, gales from the W by Tue night). Days 3-6 Mount San Jacinto Peak Weather Summary: Mostly dry. Mild temperatures (max 8Â°C on Thu night, min 3Â°C on Wed morning). Winds decreasing (near gales from the W on Wed night, light winds from the N by Sat morning).
Although it is north of the equator, average temperatures are cooler in most of Costa Rica in the U.S. summer because of the increased cloud cover. The weather in Jaco is seldom windy.The dry season humidity in Jaco Costa Rica is similar to California, but humidity may average 90% for the two rainiest months of the wet season for Jaco weather, when monthly rainfalls may be has high as 8 inches in Jaco Costa Rica.hile 24 hour averages fall in a narrow range throughout the year, the high temperatures in the dry season are noticably higher, in the 90s instead of the 80s. Downtown is very hot from 10 or 11 until 4 or 5. It is up to 10 degrees cooler on the low slopes of the jungle covered mountains surrounding Jaco Costa Rica.