When you're planning your trip to Pampas Chico, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually August and July with an average temp of 50°F, while the coldest months are July and August with an average of 50°F. The rainiest months in Pampas Chico are March, February, January, and April, with each month seeing an average of 13 inches of rainfall.