Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1931. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 0.6 11.1 6.1 2.8 15.0 12.8 21.7 20.6 23.9 15.0 6.1 3.9 2 1.7 10.0 0.6 12.8 13.9 15.6 22.8 21.7 23.9 17.2 10.0 2.8 3 1.7 8.9 0.0 15.6 14.4 16.7 23.3 22.8 25.0 18.3 11.7 2.8 4 8.3 7.2 0.6 5.0 15.0 18.9 21.7 21.1 22.8 18.9 12.8 0.6 5 2.8 6.7 6.7 2.8 17.8 18.3 22.2 22.8 21.7 18.9 11.1 3.3 6 0.0 10.6 3.3 3.3 10.0 20.6 23.9 21.7 21.7 19.4 14.4 3.9 7 6.1 14.4 -0.6 6.7 5.6 21.7 23.3 23.3 20.6 21.7 10.6 5.6 8 1.1 14.4 -2.8 12.2 13.9 20.0 24.4 23.9 20.6 19.4 12.2 5.0 9 5.6 4.4 -2.8 15.6 11.1 21.7 20.6 23.9 21.7 20.6 13.9 2.8 10 5.6 0.6 1.1 5.0 10.0 18.9 21.7 22.8 21.1 21.1 15.0 10.0 11 5.6 4.4 3.3 6.7 12.2 19.4 21.7 19.4 19.4 23.3 17.8 16.7 12 3.3 9.4 5.0 7.8 8.3 19.4 23.3 16.1 20.6 22.2 17.8 12.2 13 -0.6 10.0 12.8 11.1 8.3 23.9 22.8 18.3 19.4 22.8 18.3 7.2 14 -4.4 1.1 11.1 12.8 12.2 21.1 21.7 20.6 21.7 18.3 17.8 2.2 15 -3.3 3.9 7.8 10.6 13.3 20.6 20.0 18.9 21.1 20.6 18.3 0.6 16 3.3 5.6 4.4 12.2 16.1 22.2 20.6 17.8 22.2 15.0 19.4 5.6 17 8.3 7.2 4.4 13.3 14.4 18.3 20.6 17.8 21.7 10.6 13.9 2.8 18 5.0 4.4 6.1 12.8 18.3 20.6 22.2 19.4 21.7 10.6 6.1 -0.6 19 -1.1 3.9 11.7 15.6 16.7 21.7 22.8 22.2 20.6 10.6 8.3 0.6 20 -0.6 5.6 8.9 15.0 13.9 20.6 22.2 19.4 20.6 12.8 6.1 1.7 21 0.0 5.0 5.6 7.2 12.2 21.1 22.2 18.9 19.4 13.3 5.6 5.0 22 1.1 11.1 6.1 1.1 13.3 21.1 22.8 20.6 22.2 19.4 20.0 7.2 23 5.0 8.3 11.7 7.8 13.3 20.6 23.3 20.0 22.8 15.6 20.6 15.0 24 5.6 6.1 7.8 11.1 16.1 21.1 23.3 18.3 20.0 20.6 7.8 7.8 25 8.3 3.9 5.0 14.4 18.3 21.1 22.8 18.9 20.0 20.6 5.6 3.9 26 11.7 2.8 9.4 10.0 18.3 22.8 21.1 21.1 22.2 20.6 6.1 4.4 27 10.6 8.3 2.2 10.6 18.3 21.7 21.1 22.8 15.6 19.4 7.2 10.6 28 11.1 7.8 -2.2 13.9 19.4 21.1 21.7 23.3 15.6 15.0 5.6 5.6 29 11.7 0.0 0.0 14.4 18.9 23.3 21.7 22.2 14.4 8.3 9.4 12.2 30 7.2 0.0 9.4 15.6 18.3 22.2 23.3 19.4 12.8 7.2 4.4 11.1 31 9.4 -17.8 3.3 0.0 16.1 0.0 21.7 20.6 0.0 5.0 0.0 0.0 ----------------------------------------------------------------------------------------- Max 11.7 14.4 12.8 15.6 19.4 23.9 24.4 23.9 25.0 23.3 20.6 16.7 Min -4.4 0.6 -2.8 1.1 5.6 12.8 20.0 16.1 12.8 5.0 4.4 -0.6 Mean 4.2 7.0 4.7 10.2 14.3 20.3 22.2 20.7 20.6 16.8 11.8 5.6 -----------------------------------------------------------------------------------------