At 999 ft above sea level, 4 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.86 inHg and the temperature at 55.4 F.
On Oct 6 the noon sun stands 45 degrees above the horizon at 39.34 N, and the day is 11 h 25 min long. Level ground there takes 71 per cent of the noon sunlight a surface facing the sun would.