Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1964. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 -2.2 2.8 10.6 14.4 17.8 12.2 20.6 22.2 22.8 15.6 15.6 -2.2 2 1.1 3.9 8.9 18.3 17.2 13.3 21.1 22.8 23.9 18.9 16.1 12.8 3 7.2 9.4 6.1 20.6 16.1 16.1 21.7 23.3 23.3 18.3 18.3 7.8 4 3.9 6.7 7.2 20.0 19.4 16.1 22.8 23.9 22.8 21.1 14.4 -0.6 5 1.1 1.7 1.7 12.8 20.6 16.1 22.8 25.0 22.8 11.1 13.3 -1.7 6 3.3 1.7 8.9 10.0 20.6 19.4 22.8 23.9 21.7 9.4 10.0 -2.8 7 0.0 1.7 16.1 14.4 21.1 21.1 22.2 23.9 21.7 8.9 10.0 0.0 8 8.9 -1.1 18.9 7.8 22.8 22.8 21.7 22.8 22.8 9.4 11.1 1.7 9 0.6 1.1 4.4 5.0 18.3 24.4 22.2 23.3 22.8 13.3 11.1 5.6 10 -3.9 3.3 -1.1 8.3 21.1 25.0 21.7 24.4 22.2 9.4 10.0 9.4 11 2.8 2.2 5.0 11.7 20.6 23.3 23.3 24.4 23.9 8.9 15.0 6.1 12 -3.9 7.8 5.0 20.0 17.2 23.3 25.0 23.9 20.6 11.7 16.1 3.9 13 -8.9 5.0 10.6 11.7 12.8 22.8 21.1 23.3 17.2 11.1 11.1 6.1 14 -8.3 -1.1 11.7 10.6 12.8 22.2 20.0 24.4 18.9 11.1 18.9 -1.7 15 -2.8 4.4 5.6 11.1 17.2 21.7 21.7 24.4 17.2 10.0 21.1 -1.7 16 -0.6 -1.1 5.0 14.4 13.9 21.1 23.3 21.1 22.2 11.7 19.4 5.0 17 -6.7 -0.6 8.9 16.1 16.7 22.2 21.7 23.9 18.9 13.9 20.0 -2.8 18 0.6 3.3 10.6 19.4 16.1 23.3 21.7 22.8 18.3 16.7 18.9 -5.6 19 12.2 1.7 8.3 19.4 17.2 22.8 21.1 23.3 22.2 12.2 6.1 -3.3 20 5.0 0.6 5.6 20.6 18.9 22.8 22.2 23.3 23.3 5.6 2.2 1.7 21 7.2 -2.2 0.6 20.6 20.0 23.9 21.1 25.0 23.3 7.2 1.1 5.6 22 15.0 -2.8 2.8 19.4 19.4 21.1 23.3 20.0 21.1 8.9 -1.1 4.4 23 11.7 -0.6 12.2 20.0 18.9 21.1 23.3 20.6 21.1 13.3 0.6 11.7 24 11.7 1.7 16.7 21.1 20.6 23.3 23.9 22.8 18.9 10.6 4.4 12.2 25 0.0 2.8 9.4 19.4 21.1 22.2 23.3 23.3 17.2 10.6 3.3 10.0 26 0.6 0.0 -0.6 17.2 20.6 21.1 22.8 22.2 19.4 16.7 8.3 5.6 27 6.1 0.6 3.3 14.4 20.0 21.1 23.9 23.3 15.0 15.6 12.2 -0.6 28 2.8 -1.1 18.9 14.4 21.7 22.8 24.4 25.0 13.9 13.9 6.1 12.2 29 8.9 1.7 7.2 13.3 18.3 22.8 23.3 23.9 15.0 15.0 6.7 17.8 30 7.2 0.0 8.3 12.2 19.4 21.7 23.9 24.4 17.8 15.0 0.0 17.8 31 7.2 0.0 8.3 0.0 16.1 0.0 22.8 23.3 0.0 14.4 0.0 16.7 ----------------------------------------------------------------------------------------- Max 15.0 9.4 18.9 21.1 22.8 25.0 25.0 25.0 23.9 21.1 21.1 17.8 Min -8.9 -2.8 -1.1 5.0 12.8 12.2 20.0 20.0 13.9 5.6 -1.1 -5.6 Mean 2.8 1.8 7.9 15.3 18.5 21.1 22.5 23.4 20.4 12.6 10.7 4.9 -----------------------------------------------------------------------------------------