Length of 'Freeze Free' Season Probabilities


COLVILLE AIRPORT, WASHINGTON (451650)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 55 69 74 82 92 102 109 112 118 128 146
32.5 86 109 115 117 120 133 134 139 142 148 159
28.5 121 133 138 148 151 154 159 165 168 173 193
24.5 153 166 179 185 195 200 202 206 210 218 260
20.5 153 207 211 225 229 237 242 246 256 279 297
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