Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1987. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 3.3 11.1 5.0 6.1 18.3 17.2 22.8 22.2 20.0 12.8 15.0 7.2 2 1.1 7.2 2.8 3.3 20.6 18.9 23.3 22.8 18.3 13.3 15.0 10.0 3 3.3 7.8 6.7 0.6 17.8 18.9 22.8 23.3 19.4 12.2 13.3 12.8 4 -0.6 8.3 6.7 2.8 17.8 20.0 24.4 22.2 20.0 10.0 15.6 13.9 5 -1.7 8.3 6.1 6.7 18.3 17.8 24.4 23.9 20.6 9.4 15.0 15.0 6 6.1 5.0 10.0 5.0 16.7 17.8 22.8 23.3 21.1 15.6 10.0 14.4 7 10.0 3.9 7.8 6.1 15.0 20.0 21.7 23.3 21.7 12.2 8.9 9.4 8 7.2 4.4 8.3 6.7 15.6 20.6 22.2 23.3 20.6 12.2 13.3 6.1 9 5.6 3.3 8.9 10.0 14.4 21.1 22.2 23.9 20.6 17.2 6.7 7.2 10 1.1 3.3 6.1 11.7 15.6 21.7 22.8 23.3 21.1 15.0 3.9 5.6 11 -2.8 12.2 3.3 12.8 16.7 22.2 23.3 24.4 20.0 11.1 0.6 8.9 12 -0.6 11.1 2.8 17.8 17.2 22.2 22.8 23.9 18.3 8.9 2.8 8.9 13 6.1 11.1 4.4 11.7 16.1 21.7 22.2 24.4 21.1 8.3 5.0 5.6 14 8.9 11.7 6.1 11.1 19.4 21.7 21.7 23.9 23.9 9.4 8.9 0.6 15 4.4 7.2 15.0 7.8 18.9 23.3 20.0 24.4 22.2 13.3 11.1 -2.2 16 1.7 4.4 13.9 12.8 17.8 21.7 21.7 25.6 21.7 16.7 7.2 -1.7 17 -0.6 1.7 11.1 15.0 16.1 20.6 21.1 25.0 21.1 16.7 3.3 0.0 18 -1.7 -1.1 6.1 13.9 20.0 20.6 23.3 22.8 20.6 17.2 6.1 4.4 19 -2.8 2.8 7.8 13.3 18.3 23.3 22.8 21.7 18.9 14.4 4.4 10.0 20 0.0 2.8 10.6 15.0 17.2 24.4 22.2 22.2 17.8 12.8 2.8 5.0 21 1.1 4.4 13.3 13.3 22.2 22.8 21.1 22.2 18.9 9.4 3.9 5.6 22 0.6 6.1 13.9 13.3 20.0 22.8 21.7 23.3 18.3 8.9 10.6 4.4 23 -3.3 3.3 9.4 13.9 21.7 22.2 22.2 23.9 13.3 16.1 16.7 7.2 24 2.2 5.6 5.6 16.1 20.0 23.3 22.8 23.3 13.3 17.8 19.4 7.8 25 -0.6 5.0 6.7 13.9 19.4 23.9 21.1 23.3 15.6 17.8 6.1 3.3 26 2.2 5.6 7.8 15.0 21.7 21.7 21.1 24.4 16.1 18.3 5.6 0.6 27 3.3 6.7 3.3 15.0 22.2 20.0 22.2 23.3 18.9 13.3 3.9 0.6 28 6.7 6.1 7.2 16.7 18.3 21.7 21.7 21.7 21.7 10.6 1.7 -0.6 29 12.2 0.0 -1.1 18.9 16.7 20.6 23.3 21.7 19.4 11.7 5.6 -1.7 30 6.1 0.0 0.0 15.0 16.7 20.6 23.3 21.7 15.0 17.8 4.4 -2.8 31 6.7 0.0 -1.7 0.0 18.9 0.0 23.3 20.6 0.0 15.6 0.0 1.7 ----------------------------------------------------------------------------------------- Max 12.2 12.2 15.0 18.9 22.2 24.4 24.4 25.6 23.9 18.3 19.4 15.0 Min -3.3 -1.1 -1.7 0.6 14.4 17.2 20.0 20.6 13.3 8.3 0.6 -2.8 Mean 2.8 6.1 6.9 11.4 18.2 21.2 22.4 23.2 19.3 13.4 8.2 5.4 -----------------------------------------------------------------------------------------