Soil Survey of McHenry County, Illinois Part I - Soil Data Mart

McHenry County, Illinois—Part I 157
Table 2.--Freeze Dates in Spring and Fall
(Recorded in the period 1961-90 at Marengo, Illinois)
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|
| Temperature
|__________________________________________
Probability | | |
| 24 o F | 28 o F | 32 o F
| or lower | or lower | or lower
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| | |
Last freezing | | |
temperature | | |
in spring: | | |
| | |
1 year in 10 | | |
later than-- | Apr. 24 | May 12 | May 23
| | |
2 years in 10 | | |
later than-- | Apr. 20 | May 7 | May 18
| | |
5 years in 10 | | |
later than-- | Apr. 14 | Apr. 27 | May 8
| | |
First freezing | | |
temperature | | |
in fall: | | |
| | |
1 year in 10 | | |
earlier than-- | Oct. 11 | Sept. 27 | Sept. 24
| | |
2 years in 10 | | |
earlier than-- | Oct. 16 | Oct. 3 | Sept. 27
| | |
5 years in 10 | | |
earlier than-- | Oct. 26 | Oct. 14 | Oct. 3
| | |
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Table 3.--Growing Season
(Recorded in the period 1961-90 at Marengo,
Illinois)
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|
| Daily minimum temperature
| during growing season
|___________________________________
Probability | | |
| Higher | Higher | Higher
| than | than | than
| 24 o F | 28 o F | 32 o F
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| Days | Days | Days
| | |
9 years in 10 | 176 | 144 | 132
| | |
8 years in 10 | 183 | 153 | 137
| | |
5 years in 10 | 194 | 170 | 148
| | |
2 years in 10 | 206 | 188 | 159
| | |
1 year in 10 | 213 | 197 | 165
| | |
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