Because of decreasing atmospheric pressure, the boiling point of water drops two degrees for every 1,000 feet of elevation gain. If you don’t have a thermometer on hand, you may roughly gauge the right water temperature for coffee brewing with the chart above. Recall that the right temperature range for brewing coffee is between 195° and 205° F. When brewing between 0′ and 3,500′ in elevation, bring the water to a boil; then turn off the heat and wait about a minute for the water to cool into the ideal brewing range. Between 3,500′ and 9,000′ in elevation, the boiling point will be within the ideal range, so bring the water to a boil and use immediately. Above 10,000′ water boils at 193° and will produce an under-extracted cup. Use a pressure cooker to enable a higher boil, or drink tea.