Length of 'Freeze Free' Season Probabilities


DRAIN stat, (352406)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 34 94 114 121 128 137 147 154 161 174 202
32.5 108 142 158 172 177 186 196 201 212 236 279
28.5 150 204 221 235 250 266 272 292 335 *** ***
24.5 239 269 289 312 351 *** *** *** *** *** ***
20.5 239 318 *** *** *** *** *** *** *** *** ***
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