Daily minimum temperature (degrees Celsius) recorded at Grassland Soil and Water Research Center for calendar year 1981. ----------------------------------------------------------------------------------------- Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ----------------------------------------------------------------------------------------- 1 6.1 0.0 9.4 11.1 20.0 20.0 22.8 23.3 20.6 20.6 8.3 4.4 2 2.8 -3.3 9.4 12.8 17.2 18.3 23.3 22.2 20.6 19.4 7.2 1.1 3 2.8 -3.3 10.6 18.3 17.8 18.9 21.7 22.2 22.8 21.7 9.4 5.0 4 -1.1 3.3 12.8 14.4 19.4 20.0 23.9 22.2 24.4 22.2 10.0 5.0 5 1.1 3.9 5.0 8.9 18.9 21.7 21.1 22.2 21.7 21.7 12.8 2.2 6 5.6 3.9 3.9 8.3 15.6 21.1 26.1 22.8 23.3 22.2 12.8 10.6 7 1.1 6.1 7.2 12.2 14.4 22.8 21.7 22.8 22.2 13.3 9.4 14.4 8 2.2 3.3 7.2 17.2 18.3 23.9 23.9 22.8 23.3 12.8 11.7 13.9 9 6.1 1.1 5.0 18.9 14.4 25.0 23.3 21.1 17.2 14.4 6.1 11.7 10 7.8 -7.8 5.0 19.4 11.7 23.3 23.3 21.1 17.8 19.4 3.9 8.9 11 3.3 -11.1 8.9 18.3 8.3 19.4 22.8 22.2 19.4 20.6 5.6 11.1 12 -2.8 -6.1 8.3 17.2 11.1 21.1 21.7 22.2 20.6 22.2 8.9 6.1 13 -1.7 1.7 7.2 16.7 19.4 21.1 22.2 22.8 22.8 21.7 8.9 5.6 14 2.2 4.4 7.2 15.6 12.2 23.9 22.8 22.8 20.0 21.1 10.6 3.3 15 0.6 1.7 11.1 15.0 13.9 24.4 22.8 23.3 19.4 22.8 13.9 0.6 16 1.1 5.6 9.4 15.6 12.8 17.2 21.7 23.3 18.3 21.1 11.1 2.8 17 -2.8 5.6 6.1 17.8 22.2 21.7 22.8 22.2 12.8 22.2 8.9 -2.2 18 2.2 12.2 3.9 18.3 21.7 20.6 22.8 22.8 10.0 13.3 14.4 -6.1 19 0.6 10.0 -0.6 19.4 13.9 21.7 22.8 22.2 10.6 10.0 7.2 -4.4 20 2.2 10.0 5.6 20.0 10.6 22.2 23.3 21.1 11.7 10.0 3.3 3.3 21 0.6 13.9 12.8 17.2 13.3 22.8 22.8 18.9 14.4 15.6 1.7 3.9 22 0.0 7.2 9.4 18.9 18.9 22.8 23.3 20.6 17.2 10.6 6.1 11.7 23 0.6 5.6 8.3 15.0 16.7 22.2 23.3 20.0 21.1 8.3 13.3 1.1 24 3.9 6.7 5.6 12.2 16.7 22.2 22.2 22.2 18.3 6.1 10.0 3.3 25 5.6 11.7 6.7 12.8 16.7 21.7 23.9 21.7 17.2 10.6 16.7 -3.3 26 9.4 14.4 10.6 14.4 18.9 22.2 23.3 21.7 20.6 5.6 9.4 1.7 27 6.1 16.1 15.0 19.4 19.4 21.1 23.9 22.2 20.6 7.8 6.7 2.8 28 3.9 12.2 14.4 19.4 22.2 21.7 23.3 22.8 20.0 7.8 18.3 4.4 29 12.2 0.0 10.6 18.9 20.6 22.8 22.8 21.1 20.0 10.0 12.8 0.0 30 0.6 0.0 9.4 18.9 18.9 21.7 22.8 22.2 17.8 15.0 10.0 3.9 31 3.3 0.0 9.4 0.0 18.3 0.0 22.8 22.8 0.0 11.7 0.0 5.6 ----------------------------------------------------------------------------------------- Max 12.2 16.1 15.0 20.0 22.2 25.0 26.1 23.3 24.4 22.8 18.3 14.4 Min -2.8 -11.1 -0.6 8.3 8.3 17.2 21.1 18.9 10.0 5.6 1.7 -6.1 Mean 2.8 4.6 8.2 16.1 16.6 21.6 22.9 22.1 18.9 15.5 9.6 4.3 -----------------------------------------------------------------------------------------