Length of 'Freeze Free' Season Probabilities


PENDLETON E OR RGNL AP, (356546)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 106 122 134 141 147 151 156 165 174 183 227
32.5 124 155 165 176 181 188 193 199 206 216 258
28.5 171 189 202 208 221 233 238 247 256 264 299
24.5 206 226 240 245 252 266 272 286 297 309 ***
20.5 210 251 268 280 294 305 316 322 *** *** ***
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