Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1963. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 7.2 11.1 1.7 15.6 11.1 20.6 20.0 22.8 21.1 12.8 10.6 5.0 2 5.6 12.8 5.6 17.8 12.2 20.0 21.1 23.3 22.2 13.9 3.9 7.8 3 3.9 -3.3 12.8 18.9 17.8 20.0 20.0 23.3 23.9 14.4 10.6 -0.6 4 10.0 0.0 19.4 11.1 18.9 18.3 21.7 23.9 23.9 14.4 20.0 3.3 5 7.2 2.8 1.1 8.9 20.0 16.1 22.2 23.9 24.4 19.4 14.4 3.3 6 2.2 6.7 -1.1 10.0 17.2 17.8 22.8 23.3 23.9 18.9 11.1 7.8 7 2.2 7.2 4.4 8.9 16.1 21.7 22.8 25.0 25.6 19.4 12.2 7.8 8 3.3 3.3 6.1 12.8 14.4 17.8 22.8 25.6 22.8 18.9 16.1 2.2 9 6.1 6.1 7.2 16.7 21.1 22.2 23.9 22.8 22.2 15.6 13.3 0.6 10 8.3 11.7 6.7 18.9 20.0 22.2 23.9 24.4 23.3 16.7 12.2 10.0 11 -1.1 -3.9 13.3 20.0 19.4 21.7 23.3 23.9 23.3 14.4 12.8 0.6 12 -10.0 -7.8 8.9 13.3 19.4 23.9 23.9 23.9 22.8 17.8 12.2 -2.8 13 -8.9 -4.4 10.6 12.8 22.8 23.9 24.4 25.0 21.1 17.2 7.8 -0.6 14 -6.7 -1.1 5.6 13.3 18.3 22.8 23.9 23.3 21.1 17.8 4.4 -2.2 15 -5.6 0.0 11.1 14.4 19.4 23.3 23.9 22.8 21.1 16.7 12.8 -4.4 16 -2.2 0.6 14.4 18.9 20.0 23.3 23.9 21.7 21.1 17.2 18.9 0.0 17 6.1 5.0 15.6 18.3 20.0 20.0 22.8 21.7 21.1 15.6 19.4 3.3 18 7.2 5.0 18.3 20.6 19.4 21.1 23.3 21.1 21.7 16.7 11.7 0.0 19 -7.8 2.8 16.7 13.9 17.8 20.0 23.3 23.3 21.1 16.7 14.4 -2.2 20 -9.4 3.3 8.9 14.4 17.8 22.2 23.3 23.9 21.1 18.3 9.4 1.1 21 -5.0 1.7 8.9 18.9 17.2 21.1 23.9 21.1 19.4 16.7 16.1 -1.7 22 0.0 -3.3 7.8 21.1 16.1 22.8 23.3 21.7 20.0 15.6 12.8 -3.9 23 -8.9 2.8 6.1 17.8 11.1 23.3 23.3 22.2 20.0 20.0 3.3 -8.9 24 -12.2 1.7 16.1 14.4 18.3 21.1 23.9 23.3 18.3 17.2 1.7 -5.6 25 -7.8 9.4 18.3 18.3 20.6 20.6 22.8 22.2 17.8 16.7 4.4 1.7 26 -0.6 2.2 10.0 19.4 21.7 21.1 24.4 22.8 17.2 16.1 7.2 2.8 27 -8.3 6.1 8.9 20.6 23.3 21.7 24.4 24.4 17.2 15.0 7.2 2.8 28 -7.2 9.4 13.9 21.7 18.9 22.2 23.9 22.8 15.6 17.2 8.3 2.8 29 1.1 0.0 18.3 20.6 21.1 22.2 23.3 22.8 17.8 12.8 2.8 -1.7 30 5.6 0.0 19.4 14.4 22.2 23.3 23.3 23.9 11.1 11.1 2.8 2.2 31 3.3 0.0 16.1 0.0 18.9 0.0 23.9 21.7 0.0 16.7 0.0 -3.9 ----------------------------------------------------------------------------------------- Max 10.0 12.8 19.4 21.7 23.3 23.9 24.4 25.6 25.6 20.0 20.0 10.0 Min -12.2 -7.8 -1.1 8.9 11.1 16.1 20.0 21.1 11.1 11.1 1.7 -8.9 Mean -0.7 3.1 10.7 16.2 18.5 21.3 23.2 23.2 20.8 16.4 10.5 0.9 -----------------------------------------------------------------------------------------