Length of 'Freeze Free' Season Probabilities
PORTLAND INTL AP, st (356751)
| Temp F |
Shortest |
90% |
80% |
70% |
60% |
50% |
40% |
30% |
20% |
10% |
Longest |
| 36.5
| 132
| 153
| 166
| 177
| 183
| 188
| 194
| 201
| 206
| 217
| 241
|
| 32.5
| 174
| 197
| 205
| 213
| 223
| 227
| 236
| 243
| 248
| 259
| 297
|
| 28.5
| 225
| 245
| 249
| 261
| 267
| 277
| 284
| 296
| 314
| ***
| ***
|
| 24.5
| 240
| 286
| 302
| 314
| 336
| ***
| ***
| ***
| ***
| ***
| ***
|
| 20.5
| 253
| 331
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
| ***
|
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