COLLEGE OF FOOD, AGRICULTURAL,
AND ENVIRONMENTAL SCIENCES

The Ohio State Phenology Calendar

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Wooster on 6/17/2026 1:05:16 AM is 1,057 GDD

The GDD on 6/17 in previous years:


  • 2025: 829
  • 2024: 1,026
  • 2023: 768
  • 2022: 1,005
  • 2021: 951
  • 2020: 833
  • 2019: 841
  • 2018: 985
  • 2017: 1,009
  • 2016: 906
  • 2015: 939
  • 2014: 837
  • 2013: 895
  • 2012: 1,121
  • 2011: 890
  • 2010: 1,027
  • 2009: 841
  • 2008: 842
  • 2007: 985
  • 2006: 834
  • 20 Year GDD Average for Wooster on 6/17 - 918
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Denise Ellsworth
1680 Madison Ave. | Wooster, OH 44691
Phone: 330-263-3723 | ellsworth.2@osu.edu


Ashley Kulhanek
4046 Medina Road | Medina, OH 44256
Phone: 330-661-6404 | kulhanek.5@osu.edu


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