Length of 'Freeze Free' Season Probabilities


DETROIT st, (352277)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 26 39 47 64 74 91 105 110 119 138 145
32.5 86 101 121 128 135 140 145 152 160 176 178
28.5 138 153 176 191 201 206 210 215 227 239 254
24.5 199 208 232 243 250 261 268 274 278 *** ***
20.5 231 238 266 291 310 328 *** *** *** *** ***
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