Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1928. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 -11.7 3.9 3.3 6.7 16.7 19.4 20.6 21.7 22.8 16.1 13.3 4.4 2 -12.8 7.2 6.7 15.6 17.8 18.9 20.0 22.8 21.7 18.3 2.2 5.0 3 -7.8 9.4 10.0 17.2 16.1 17.8 21.1 23.9 19.4 18.9 0.0 4.4 4 -9.4 12.8 13.9 17.2 12.8 15.0 20.0 24.4 17.8 22.8 0.6 10.0 5 -6.1 13.3 6.1 10.0 7.2 11.1 21.1 22.8 16.1 23.3 9.4 0.6 6 5.6 11.7 11.1 5.6 11.1 12.8 21.7 22.2 16.1 21.1 11.1 3.9 7 10.6 6.1 11.1 6.1 8.9 18.3 20.6 22.8 15.0 18.9 8.9 2.8 8 4.4 3.9 15.0 1.1 12.8 21.1 21.7 22.2 21.1 18.9 11.1 -3.3 9 -1.7 3.9 11.7 -1.1 12.2 22.8 20.6 23.3 21.1 18.9 10.0 -1.7 10 -0.6 2.8 6.7 3.3 11.7 18.9 20.0 24.4 21.7 16.1 12.2 4.4 11 1.7 1.1 7.2 1.7 12.8 19.4 20.6 23.9 21.7 21.1 6.7 5.0 12 4.4 6.1 14.4 6.1 13.9 22.8 20.6 22.8 21.7 22.2 7.8 7.2 13 10.6 3.9 11.1 15.0 15.6 15.6 22.2 22.2 20.6 20.6 7.8 3.3 14 6.1 0.6 11.1 0.6 11.7 20.0 22.2 22.8 21.7 17.2 17.2 1.7 15 15.0 3.9 13.3 -1.7 17.2 16.1 22.8 22.8 21.7 21.1 20.0 9.4 16 17.2 1.7 0.0 2.2 18.3 21.1 21.7 22.2 20.0 16.7 15.6 15.6 17 18.3 -1.1 -1.7 8.3 16.7 21.7 21.1 22.2 20.0 9.4 7.8 5.0 18 12.8 -3.9 0.6 13.9 17.8 22.2 21.7 23.3 19.4 9.4 4.4 0.6 19 7.8 -2.2 0.6 17.8 18.9 23.3 22.2 21.7 13.9 10.6 1.1 -0.6 20 1.7 8.3 0.0 19.4 18.3 22.8 23.3 23.3 15.0 13.3 -0.6 -4.4 21 -0.6 7.2 6.1 18.9 15.6 22.2 23.9 23.3 18.9 12.8 0.6 -2.8 22 0.0 1.7 7.8 10.6 8.9 21.7 23.3 23.3 15.6 8.9 1.7 -2.2 23 3.9 1.1 12.8 7.2 11.7 21.1 23.9 23.3 15.0 2.2 5.6 -2.2 24 6.7 -3.9 12.8 7.8 13.9 21.1 23.9 25.6 12.2 8.9 7.2 0.0 25 2.2 -3.9 12.2 10.0 15.6 18.3 22.8 18.9 15.6 9.4 6.7 2.2 26 3.3 -2.8 14.4 15.6 16.1 18.3 20.6 21.1 16.1 11.1 3.3 1.7 27 -0.6 -1.7 7.8 8.3 15.6 18.3 20.6 21.7 15.6 13.3 3.3 1.1 28 -2.2 2.8 12.2 6.1 19.4 22.2 21.7 23.9 18.3 16.1 5.6 3.9 29 1.7 3.9 12.8 11.1 18.3 22.2 22.2 22.8 17.2 13.3 13.9 8.3 30 4.4 0.0 0.0 15.0 19.4 21.7 21.7 19.4 13.3 6.1 6.7 0.0 31 5.0 0.0 3.3 0.0 20.0 0.0 21.7 21.1 0.0 8.9 0.0 7.2 ----------------------------------------------------------------------------------------- Max 18.3 13.3 15.0 19.4 20.0 23.3 23.9 25.6 22.8 23.3 20.0 15.6 Min -12.8 -3.9 -1.7 -1.7 7.2 11.1 20.0 18.9 12.2 2.2 -0.6 -4.4 Mean 2.9 3.4 8.2 9.2 14.9 19.6 21.7 22.7 18.2 15.0 7.4 2.9 -----------------------------------------------------------------------------------------