Length of 'Freeze Free' Season Probabilities


SAINT HELENA, CALIFORNIA (047643)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 109 152 167 176 180 186 195 201 217 226 265
32.5 151 184 201 210 222 230 237 243 259 315 ***
28.5 221 250 266 281 303 311 334 *** *** *** ***
24.5 267 331 *** *** *** *** *** *** *** *** ***
20.5 *** *** *** *** *** *** *** *** *** *** ***
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