Length of 'Freeze Free' Season Probabilities


YELLOWSTONE PK MAMMOTH, (489905)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 13 19 33 44 48 51 58 64 69 81 98
32.5 27 51 62 73 79 90 95 103 108 115 134
28.5 27 87 95 103 110 117 121 129 138 145 168
24.5 62 120 127 135 143 145 150 162 171 176 187
20.5 129 139 151 159 161 167 175 180 183 195 208
Graphic Output
 Shortest - Least number of consecutive days recorded with minimum temperature 
            above threshold.
            *** means minimum temperature below threshold has not occurred.

xx% - Percent probability that a consecutive number of days will occur with the minimum temperature not below the threshold. *** means non-occurrence of the threshold
Longest - Greatest number of consecutive days recorded with minimum temperature above threshold. *** means that at least one year occurred when minimum temperature below threshold was not recorded. Note: All periods include August 1.

Western Regional Climate Center, wrcc@dri.edu