Length of 'Freeze Free' Season Probabilities


N WILLAMETTE EXP STN, (356151)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 81 119 139 144 151 153 158 160 169 183 194
32.5 150 170 174 180 189 197 204 210 223 236 246
28.5 205 211 221 241 245 251 268 277 283 294 ***
24.5 263 284 307 320 340 *** *** *** *** *** ***
20.5 291 317 *** *** *** *** *** *** *** *** ***
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