Length of 'Freeze Free' Season Probabilities


I-L RCH st, (263940)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 126 144 999 151 154 156 159 162 167 173 191
32.5 141 152 999 167 171 182 196 200 202 204 210
28.5 173 173 999 199 207 216 220 232 236 246 254
24.5 174 203 999 223 232 240 250 254 262 277 284
20.5 239 253 999 272 275 282 287 292 306 317 318
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