Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1955. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 4.4 13.3 12.2 7.8 20.0 18.3 22.2 23.9 20.0 21.1 20.0 0.6 2 8.9 5.0 13.3 9.4 17.2 17.8 22.2 23.9 18.3 20.6 20.0 3.9 3 17.2 10.6 16.7 10.6 17.2 17.8 22.2 23.9 16.7 20.0 2.2 13.3 4 16.7 9.4 17.2 18.9 17.8 18.9 21.7 22.2 17.2 20.6 1.7 5.6 5 16.1 5.0 14.4 19.4 17.8 16.7 21.7 21.1 19.4 21.7 11.7 5.0 6 1.7 5.0 6.7 12.8 16.7 17.2 22.2 22.8 21.1 22.8 13.9 0.0 7 3.9 1.7 2.2 9.4 16.7 22.2 22.2 22.8 18.9 11.1 2.8 5.0 8 7.2 1.1 1.7 9.4 18.3 22.2 22.2 23.3 19.4 10.6 0.0 6.7 9 9.4 4.4 8.3 12.2 20.0 17.8 22.2 23.9 21.1 8.9 4.4 -2.2 10 2.8 2.2 15.6 13.9 21.1 12.2 21.7 22.8 21.7 13.3 1.7 0.6 11 1.1 -6.1 16.1 15.0 18.3 13.9 22.8 22.2 19.4 20.6 7.8 1.1 12 6.7 -3.9 16.1 17.8 15.0 15.0 23.3 22.8 20.6 21.1 14.4 -2.8 13 2.8 2.8 15.0 10.0 20.0 18.3 23.3 21.7 18.3 13.9 16.1 -1.7 14 7.2 7.8 16.7 11.1 21.1 19.4 22.2 19.4 20.0 11.1 18.9 5.6 15 8.3 9.4 17.8 11.7 21.1 18.3 21.1 19.4 20.6 11.1 22.8 0.0 16 7.8 12.8 12.8 12.8 21.1 23.9 22.8 20.0 20.6 12.2 3.9 -5.0 17 6.1 6.1 11.1 18.9 17.2 22.8 21.1 21.7 19.4 9.4 -1.1 0.0 18 7.2 15.0 12.8 12.8 18.3 17.8 22.2 17.2 21.1 7.2 7.8 2.8 19 -1.1 1.1 10.0 18.3 16.7 19.4 21.7 20.0 20.0 9.4 5.6 3.9 20 0.0 -1.1 14.4 19.4 15.6 21.1 20.0 20.6 20.6 10.0 4.4 7.2 21 2.8 0.6 5.0 17.8 17.8 18.9 21.7 22.2 21.7 10.6 8.3 3.9 22 1.7 -1.7 -2.2 20.0 17.2 19.4 22.2 21.7 22.2 11.7 17.8 5.6 23 -0.6 -0.6 1.7 18.9 18.3 20.6 22.2 21.7 22.8 12.2 11.1 9.4 24 -1.7 4.4 9.4 18.9 21.1 19.4 21.1 21.7 21.7 7.2 5.0 6.7 25 -0.6 6.7 5.6 17.8 21.1 22.2 22.2 22.2 21.7 3.3 4.4 15.0 26 4.4 14.4 -3.9 16.1 22.2 22.8 21.7 22.2 20.6 5.6 4.4 5.6 27 3.9 17.2 -2.2 17.8 20.0 22.8 22.8 21.7 20.0 10.6 7.2 5.6 28 0.6 17.2 -2.2 19.4 23.9 21.1 23.3 19.4 21.1 15.0 -3.9 8.3 29 -4.4 0.0 2.8 18.9 16.7 21.7 22.2 22.8 21.1 4.4 -3.3 15.0 30 2.8 0.0 4.4 14.4 16.7 23.3 22.2 22.8 22.8 5.6 1.1 3.3 31 7.2 0.0 13.3 0.0 18.3 0.0 23.3 21.7 0.0 6.7 0.0 -1.7 ----------------------------------------------------------------------------------------- Max 17.2 17.2 17.8 20.0 23.9 23.9 23.3 23.9 22.8 22.8 22.8 15.0 Min -4.4 -6.1 -3.9 7.8 15.0 12.2 20.0 17.2 16.7 3.3 -3.9 -5.0 Mean 4.9 5.7 9.1 15.1 18.7 19.4 22.1 21.8 20.3 12.6 7.7 4.1 -----------------------------------------------------------------------------------------