Temperature for September 1999
In September 1999 the average high temperature in Grand Island, NE was 77.5°F, and this was 3.2°F cooler than the average of 80.7°F. The hottest day in September 1999 was 1 September when the temperature reached 93.9°F. Overnight the average temperature in September is 51.5°F and in 1999 the average overnight temperature was 0.8°F cooler at 50.7°F.