Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1966. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 20.0 0.0 4.4 10.0 10.6 18.3 21.1 25.0 21.7 10.6 7.2 1.1 2 13.3 -5.6 10.0 8.3 11.1 16.7 20.6 25.6 22.2 10.0 -1.1 10.6 3 2.2 -3.9 13.3 18.3 16.1 16.1 22.2 21.7 22.8 16.1 -1.1 2.2 4 3.9 -3.3 5.6 11.7 15.6 18.9 21.7 22.8 22.8 21.7 7.8 2.8 5 4.4 3.9 0.0 4.4 16.7 22.2 22.2 22.8 23.9 15.0 10.0 14.4 6 3.3 16.7 -1.1 5.6 17.8 22.2 17.8 23.3 22.8 13.9 15.0 17.2 7 3.9 16.1 5.6 12.2 19.4 20.0 22.2 22.2 23.3 12.8 16.7 18.9 8 4.4 16.7 6.7 15.6 15.6 18.3 16.1 22.8 21.1 13.9 18.9 13.9 9 10.6 13.3 7.8 12.8 20.6 16.1 22.8 22.2 20.6 20.6 20.0 5.6 10 6.1 7.8 11.1 16.1 12.8 20.0 21.7 22.2 19.4 19.4 5.6 1.7 11 5.6 4.4 14.4 17.8 16.1 20.0 22.2 21.7 19.4 16.7 12.2 -5.0 12 10.6 6.7 13.3 19.4 18.9 20.6 22.8 20.6 17.8 20.0 8.3 -4.4 13 7.2 3.3 8.9 12.8 10.6 20.0 16.7 22.2 19.4 21.7 11.7 -3.3 14 0.6 1.7 8.3 12.2 13.9 22.2 23.3 22.2 21.7 22.2 9.4 -2.8 15 0.0 2.2 10.0 8.9 20.0 21.1 22.8 23.9 20.0 8.9 8.9 4.4 16 1.7 5.0 10.0 9.4 11.7 20.0 23.3 23.3 18.3 6.7 8.9 3.9 17 1.1 -1.7 12.8 12.8 18.3 22.2 23.9 22.8 18.3 12.8 9.4 3.3 18 1.7 1.1 14.4 13.9 15.0 20.6 25.0 21.7 18.9 11.1 12.8 2.8 19 2.8 3.9 11.7 17.8 17.8 18.9 22.8 23.9 17.8 6.7 13.3 2.8 20 0.6 5.6 15.0 15.0 19.4 20.6 23.3 22.8 16.7 3.9 10.6 3.3 21 -0.6 3.9 16.1 8.3 20.0 19.4 23.3 23.3 15.6 5.6 14.4 6.7 22 -4.4 -2.8 17.2 11.7 23.3 19.4 25.0 22.2 14.4 13.3 16.1 12.2 23 -8.3 -3.3 5.0 17.8 24.4 20.0 23.3 22.8 18.3 10.6 15.6 -2.2 24 0.0 -3.3 1.7 16.7 21.1 21.7 23.9 21.7 16.1 12.2 18.3 -7.8 25 1.7 -1.1 5.6 17.8 15.6 20.6 24.4 16.7 19.4 8.3 15.0 -1.7 26 -0.6 7.2 7.2 15.0 15.6 21.1 23.3 18.3 17.8 10.6 17.8 3.9 27 -3.3 6.7 14.4 17.2 17.8 20.6 23.3 19.4 18.9 10.0 10.0 8.3 28 2.8 6.1 10.6 20.0 16.1 21.1 22.8 20.0 16.7 8.3 2.8 -1.1 29 -9.4 0.0 8.3 16.7 18.3 20.6 23.9 24.4 17.2 13.3 2.2 -5.6 30 -10.6 0.0 6.1 20.6 17.8 22.8 24.4 21.7 16.7 11.7 5.6 0.0 31 -1.1 0.0 10.0 0.0 18.3 0.0 25.0 21.1 0.0 12.2 0.0 1.7 ----------------------------------------------------------------------------------------- Max 20.0 16.7 17.2 20.6 24.4 22.8 25.0 25.6 23.9 22.2 20.0 18.9 Min -10.6 -5.6 -1.1 4.4 10.6 16.1 16.1 16.7 14.4 3.9 -1.1 -7.8 Mean 2.3 3.8 9.2 13.9 17.0 20.1 22.5 22.2 19.3 12.9 10.7 3.5 -----------------------------------------------------------------------------------------