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  • Michigan State University Extension
  • Michigan State University Ag Bio Research
  • Project GREEEN

Stephenson Historical Degree Day Summary (Numerical Integration method) from 3/1 to 4/25 (Report issued 4/25/2024 12:34)

Year Degree Days Base 42°F Degree Days Base 45°F Degree Days Base 50°F Dates evaluated
2024 163 113 59 Current data from 3/1 through 4/25/2024 Noon.
2023 160 130 92 Data from 3/1 through 4/25/2023.
2022 69 46 22 Data from 3/1 through 4/25/2022.
2021 184 123 57 Data from 3/1 through 4/25/2021.
2020 61 37 14 Data from 3/1 through 4/25/2020.
2019 92 61 27 Data from 3/1 through 4/25/2019.
Average of 5 years, not including current year 112.8 79.3 42.4 5 years with > 90% of data.
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