Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1923. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 0.6 16.7 1.1 6.1 19.4 22.2 17.8 22.2 22.8 16.7 5.0 1.7 2 6.7 10.6 6.7 12.8 13.3 18.9 20.0 21.7 23.9 17.8 5.6 10.6 3 -5.6 -2.2 16.7 17.8 11.7 20.0 18.9 21.7 20.6 15.6 5.6 7.8 4 -2.8 -6.1 7.8 17.2 15.6 21.7 19.4 22.8 20.6 16.7 7.8 8.9 5 5.0 -6.1 7.8 5.6 11.1 21.7 20.6 22.2 20.0 16.1 2.8 0.0 6 0.0 -14.4 9.4 10.0 12.2 22.2 21.1 23.9 21.1 13.3 0.0 -0.6 7 3.9 -8.3 -1.1 16.7 16.7 21.1 21.1 22.8 20.6 15.6 -0.6 5.0 8 -1.1 -2.2 3.9 13.3 12.8 21.7 19.4 23.3 17.8 15.6 3.3 16.1 9 3.3 7.8 10.6 8.3 10.0 20.6 21.1 22.8 16.7 18.3 2.8 17.2 10 -3.9 6.1 16.7 15.6 11.7 20.6 22.2 21.7 16.1 19.4 3.9 7.2 11 8.3 5.6 15.6 15.6 20.0 23.3 22.2 22.2 18.3 12.8 10.6 6.1 12 1.7 8.3 7.8 13.9 21.1 19.4 22.8 21.7 19.4 14.4 13.9 5.0 13 10.0 6.7 0.0 11.7 15.6 20.0 22.2 22.8 18.3 17.2 12.2 5.0 14 17.8 4.4 6.1 11.1 18.9 22.2 22.2 23.3 17.2 12.8 13.3 -2.8 15 1.7 1.7 9.4 10.0 15.6 22.2 22.8 23.3 20.0 11.1 13.9 -3.3 16 -5.6 2.8 -1.7 6.7 11.1 22.8 23.9 22.2 18.3 13.9 7.8 -1.1 17 -1.7 1.7 -3.3 8.9 14.4 23.3 23.3 23.9 21.7 15.0 5.0 5.0 18 12.8 -1.1 -1.1 8.9 19.4 23.3 22.2 22.8 21.1 13.3 0.0 5.6 19 12.8 -2.2 -6.1 11.1 20.0 21.1 24.4 23.3 23.3 4.4 3.3 7.2 20 14.4 1.7 -3.9 12.8 16.7 21.1 21.7 21.1 23.3 3.3 4.4 6.1 21 13.3 12.2 8.3 6.7 20.0 22.8 21.1 22.2 12.2 3.9 5.0 11.7 22 3.9 10.0 10.6 12.2 21.1 22.8 18.3 23.9 11.7 1.1 11.7 7.8 23 1.1 7.8 4.4 21.1 21.1 21.7 20.6 21.1 12.2 2.8 11.1 5.6 24 0.6 6.7 -0.6 19.4 18.9 22.2 21.1 18.3 17.8 4.4 6.1 0.6 25 6.1 6.7 7.8 16.7 16.7 22.2 21.7 15.0 21.7 10.6 13.3 2.2 26 15.6 9.4 17.8 18.3 13.3 23.3 22.8 17.2 22.2 12.2 13.3 8.9 27 16.1 8.9 7.2 19.4 17.2 22.8 24.4 21.7 22.8 11.1 8.3 16.1 28 11.1 4.4 6.7 21.1 20.0 23.9 23.3 21.1 20.6 10.0 3.9 11.1 29 11.1 0.0 7.2 11.7 23.3 16.7 22.8 20.0 18.9 15.6 2.2 13.9 30 16.1 0.0 6.7 16.1 17.2 18.9 23.9 21.1 15.6 13.3 0.0 17.8 31 17.2 0.0 5.0 0.0 23.3 0.0 23.3 22.8 0.0 6.1 0.0 -3.9 ----------------------------------------------------------------------------------------- Max 17.8 16.7 17.8 21.1 23.3 23.9 24.4 23.9 23.9 19.4 13.9 17.8 Min -5.6 -14.4 -6.1 5.6 10.0 16.7 17.8 15.0 11.7 1.1 -0.6 -3.9 Mean 6.1 3.5 5.9 13.2 16.8 21.6 21.7 21.8 19.2 12.1 6.5 6.4 -----------------------------------------------------------------------------------------