Length of 'Freeze Free' Season Probabilities


TROUTDALE, OREGON (358634)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 123 141 149 156 164 170 175 190 197 204 234
32.5 159 167 197 203 207 221 230 245 251 271 294
28.5 206 247 249 256 271 278 289 297 340 *** ***
24.5 248 286 305 *** *** *** *** *** *** *** ***
20.5 291 *** *** *** *** *** *** *** *** *** ***
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