Thirty-one years of hourly gridded (10 m) air temperature, relative humidity, dew point temperature, precipitation amount, and precipitation phase data are presented for the Reynolds Creek Experimental Watershed, Idaho, which is part of the Critical Zone Observatory network. The air temperature, relative humidity, and precipitation are distributed from weather station measurements. This dataset covers a wide range of weather extremes in the rain–snow transition zone from 1984 to 2014.