Length of 'Freeze Free' Season Probabilities


CAIRO 3 N, ILLINOIS (111166)
Temp F Shortest 90% 80% 70% 60% 50% 40% 30% 20% 10% Longest
36.5 173 190 195 199 202 206 211 215 219 230 248
32.5 182 205 212 218 225 228 231 234 243 254 270
28.5 211 225 228 235 243 251 257 259 270 277 292
24.5 236 246 258 265 270 273 281 288 290 301 312
20.5 237 267 279 284 290 297 302 306 317 *** ***
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