A wide variation between day and nighttime temperatures is also typical of mountain weather. Summer days in July and August often reach the 70's or 80's and drop into the 40's at night. All temperatures given are in Fahrenheit. Based on ten years of precipitation data, Estes Park receives approximately 13.10' of moisture every year. Grand Lake receives about 19.95' yearly. This precipitation comes in the form of rain or snowfall through the year.