Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1959. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 -5.6 2.2 3.9 12.8 18.3 22.2 22.8 24.4 23.9 20.6 11.7 8.3 2 -0.6 0.0 8.9 7.8 18.9 17.8 23.3 24.4 25.0 23.3 16.7 4.4 3 -5.0 -0.6 18.3 12.8 21.1 21.1 22.2 24.4 24.4 23.3 19.4 3.3 4 -12.2 -1.1 6.7 10.0 21.7 19.4 22.2 24.4 23.3 19.4 13.9 7.2 5 -8.3 3.3 4.4 15.6 17.8 18.9 22.2 23.3 23.3 16.7 8.9 5.6 6 2.2 -1.7 1.7 17.2 16.7 17.2 23.9 24.4 23.3 18.3 0.0 -1.7 7 3.3 5.6 3.3 18.9 18.9 17.8 22.2 25.6 22.2 17.2 -0.6 5.6 8 1.7 13.9 9.4 11.1 17.8 20.0 22.8 23.3 21.1 19.4 2.8 2.2 9 -2.8 13.9 8.3 8.3 19.4 20.0 23.3 21.1 21.7 15.0 4.4 11.1 10 -4.4 11.7 11.1 7.8 16.7 23.3 23.3 21.7 21.7 19.4 6.1 13.9 11 0.6 3.9 11.1 8.9 15.6 24.4 24.4 21.1 21.1 18.3 8.9 13.3 12 11.1 5.6 3.3 5.6 15.6 18.3 22.2 23.3 15.0 20.0 8.9 5.6 13 13.9 12.2 5.0 1.7 17.8 21.7 23.9 22.2 18.9 17.8 5.6 5.0 14 13.9 4.4 3.9 6.7 18.3 21.1 21.7 22.2 19.4 12.2 -2.2 9.4 15 6.1 5.0 5.6 8.9 14.4 20.0 22.8 22.2 18.3 11.1 -1.1 8.9 16 -3.3 4.4 6.7 12.2 15.6 21.1 23.3 21.7 18.9 11.7 2.2 8.9 17 -4.4 14.4 3.3 16.1 20.0 22.2 23.3 23.9 19.4 12.2 -2.2 5.6 18 0.6 7.2 7.8 16.7 20.6 22.2 23.3 23.9 18.9 8.3 -2.8 6.1 19 12.2 0.0 5.6 18.3 21.1 22.2 23.9 23.9 21.1 10.6 0.6 1.7 20 15.6 -1.1 11.7 16.7 21.7 24.4 21.1 23.3 20.6 11.1 5.6 0.6 21 -4.4 2.8 6.7 8.3 20.6 23.3 21.1 21.7 22.8 13.3 8.9 4.4 22 -7.8 4.4 3.3 5.0 20.6 22.8 22.2 21.7 23.9 14.4 7.8 5.0 23 -3.3 6.1 7.2 8.9 16.7 23.3 23.9 23.3 21.1 13.3 10.0 10.0 24 8.9 10.0 10.0 11.1 17.8 25.6 22.8 22.2 22.8 13.3 6.1 7.2 25 10.0 6.1 17.2 16.7 18.9 21.1 22.2 20.6 22.8 10.0 6.1 7.8 26 10.0 9.4 11.1 18.9 21.7 21.1 21.1 22.8 23.3 17.2 10.0 12.2 27 2.2 5.6 7.2 16.7 21.7 22.8 22.8 22.8 25.6 10.6 3.3 8.9 28 2.2 7.2 8.3 16.7 20.6 22.8 22.2 23.9 26.1 7.8 -0.6 2.2 29 9.4 0.0 6.7 14.4 19.4 23.3 22.8 22.8 18.9 11.1 -2.2 2.8 30 4.4 0.0 8.3 17.2 21.1 23.3 22.2 23.3 22.2 16.1 2.2 3.3 31 2.8 0.0 14.4 0.0 21.1 0.0 23.3 18.9 0.0 17.2 0.0 4.4 ----------------------------------------------------------------------------------------- Max 15.6 14.4 18.3 18.9 21.7 25.6 24.4 25.6 26.1 23.3 19.4 13.9 Min -12.2 -1.7 1.7 1.7 14.4 17.2 21.1 18.9 15.0 7.8 -2.8 -1.7 Mean 2.2 5.5 7.8 12.3 19.0 21.5 22.7 22.9 21.7 15.2 5.3 6.2 -----------------------------------------------------------------------------------------