Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1921. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 7.2 0.0 11.1 1.7 17.2 20.0 22.2 20.0 22.8 13.9 4.4 11.1 2 -3.9 0.6 12.2 5.6 13.9 22.2 22.2 22.2 23.3 17.2 3.3 5.6 3 -5.6 -2.2 11.1 11.7 8.9 17.2 23.9 23.3 22.2 17.2 5.6 5.6 4 3.3 8.3 12.8 12.8 13.3 18.3 23.9 22.2 22.2 19.4 3.3 1.7 5 2.2 2.8 14.4 17.8 12.2 19.4 21.1 22.8 22.2 15.6 5.6 -1.7 6 11.7 12.8 18.3 10.6 15.0 19.4 20.0 22.8 22.2 13.9 10.0 7.2 7 12.2 3.9 17.2 8.9 15.6 20.6 21.1 22.8 22.2 11.7 4.4 7.2 8 6.7 1.1 12.8 5.6 19.4 19.4 21.7 21.7 22.2 3.3 4.4 3.3 9 1.1 4.4 7.8 10.0 15.0 18.3 20.0 22.2 21.1 4.4 4.4 1.1 10 -0.6 -1.1 2.2 10.0 8.9 18.9 21.1 21.1 19.4 15.6 0.6 -2.8 11 5.6 -3.9 14.4 0.0 15.6 21.1 20.6 22.8 22.8 17.8 6.7 -1.7 12 1.7 1.7 6.7 8.9 13.3 20.6 22.8 22.8 19.4 9.4 4.4 -0.6 13 0.6 1.7 16.7 12.2 14.4 21.1 22.2 22.8 22.2 8.9 16.7 0.6 14 -0.6 8.3 14.4 12.2 19.4 22.8 21.1 22.8 22.2 4.4 8.9 3.3 15 -2.8 5.6 12.2 18.3 14.4 21.7 24.4 23.3 20.0 8.9 11.7 13.3 16 2.8 16.7 19.4 11.1 14.4 21.1 22.8 22.8 20.6 16.7 20.6 16.1 17 7.2 8.9 17.2 2.2 15.0 22.2 22.8 23.9 22.2 12.8 21.7 1.1 18 5.6 4.4 17.8 -0.6 17.2 24.4 21.1 22.2 22.2 10.0 8.3 -7.2 19 8.9 0.6 18.3 10.0 16.7 20.6 20.6 22.2 20.6 16.1 -1.1 12.2 20 16.7 -1.1 18.9 14.4 17.2 21.1 22.2 21.1 21.1 13.3 -5.6 14.4 21 15.6 -3.9 17.8 10.6 16.1 20.6 22.2 16.7 22.8 5.0 0.0 4.4 22 15.0 7.8 6.1 10.6 16.7 18.3 19.4 20.0 22.8 7.2 18.3 6.1 23 15.6 2.2 8.3 10.6 18.3 17.8 22.8 21.7 20.0 10.6 18.9 18.9 24 12.8 8.9 13.9 10.6 18.9 19.4 22.8 20.0 21.1 6.7 16.1 -0.6 25 4.4 5.6 12.2 22.2 20.0 19.4 22.2 21.1 21.1 18.3 10.6 -5.6 26 0.6 17.2 18.3 11.7 22.8 19.4 21.1 21.1 20.6 4.4 12.2 -2.8 27 -3.9 17.2 8.9 10.6 20.6 22.8 21.1 20.0 21.1 3.3 10.0 1.7 28 4.4 11.7 5.6 13.9 20.0 22.2 21.1 19.4 18.9 11.1 -3.3 17.2 29 13.3 0.0 0.0 13.3 21.1 21.1 20.6 20.0 18.3 2.8 1.7 10.0 30 4.4 0.0 6.1 15.6 18.3 22.2 20.0 18.3 18.3 13.9 10.0 14.4 31 1.7 0.0 6.7 0.0 20.0 0.0 21.7 21.1 0.0 4.4 0.0 10.6 ----------------------------------------------------------------------------------------- Max 16.7 17.2 19.4 22.2 22.8 24.4 24.4 23.9 23.3 19.4 21.7 18.9 Min -5.6 -3.9 0.0 -0.6 8.9 17.2 19.4 16.7 18.3 2.8 -5.6 -7.2 Mean 5.3 5.0 12.3 10.4 16.5 20.5 21.7 21.5 21.3 10.9 7.8 5.3 -----------------------------------------------------------------------------------------