BOISE, Idaho – Gas prices in Boise have jumped up just over eight cents in the past week, making an average gallon of gas cost $3.65 per gallon on Monday, August 5. GasBuddy surveyed 216 gas stations in the Boise area, and found prices in Boise not only jumped eight cents this week, but prices are seven cents higher than a month ago. GasBuddy, however, also found that current prices are 32 cents lower than a year ago.