Length of 'Freeze Free' Season Probabilities


date! , (a vali)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 167 173 178 181 189 191 194 197 204 211 228
32.5 193 205 209 215 216 220 222 229 230 245 248
28.5 211 218 232 233 242 248 249 251 252 257 266
24.5 234 243 252 260 264 268 274 279 285 294 309
20.5 250 263 275 279 282 291 302 308 *** *** ***
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