Length of 'Freeze Free' Season Probabilities


SILVERTON 4 SE, at (357827)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 137 151 165 173 181 185 189 190 192 198 202
32.5 176 181 188 195 205 211 220 228 236 243 243
28.5 237 242 250 253 261 276 295 308 313 *** ***
24.5 251 261 274 294 318 333 *** *** *** *** ***
20.5 251 272 311 *** *** *** *** *** *** *** ***
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