Length of 'Freeze Free' Season Probabilities


BOISE WSFO AIRPORT, IDAHO (101022)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 73 104 111 118 123 127 130 133 139 156 182
32.5 111 122 138 142 148 154 158 165 171 182 193
28.5 134 146 156 172 177 182 189 195 200 212 241
24.5 146 187 198 208 209 220 223 237 245 253 274
20.5 172 232 239 249 256 263 273 281 292 313 ***
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