Length of 'Freeze Free' Season Probabilities


WALLA WALLA WSO, ta (458931)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 134 161 171 178 181 185 188 192 198 206 222
32.5 182 200 203 210 214 224 229 233 237 246 267
28.5 206 230 236 244 252 259 263 273 279 297 315
24.5 241 248 266 273 285 296 300 309 315 *** ***
20.5 251 276 298 308 310 317 330 *** *** *** ***
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