county: MARION | location: HANNIBAL WTR WKS | lat: 39.723 | long: -91.372 | elev: 712 ft.
Temp Probability of observing a temperature as cold, or colder, later in the spring or earlier in the fall than the indicated date.
10% 30% 50% 70% 90%
(°F) spring fall season
length*
spring fall season
length*
spring fall season
length*
spring fall season
length*
spring fall season
length*
36 5/6 9/28 194 4/29 10/7 181 4/23 10/13 172 4/16 10/20 164 4/7 10/27 151
32 4/27 10/9 216 4/18 10/19 204 4/11 10/25 195 4/6 10/31 186 3/29 11/8 173
28 4/18 10/20 238 4/8 10/30 225 4/3 11/4 216 3/27 11/11 207 3/16 11/20 193
24 4/9 10/30 259 3/31 11/7 245 3/23 11/14 236 3/16 11/22 226 3/6 12/1 212

*Season length: number of days between last spring and first fall temperature thresholds, i.e. 36, 32, 28 and 24°F.