COLLEGE OF FOOD, AGRICULTURAL,
AND ENVIRONMENTAL SCIENCES

The Ohio State Phenology Calendar

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Wooster on 9/18/2025 4:36:15 PM is 2,609 GDD

The GDD on 9/18 in previous years:


  • 2024: 2,954
  • 2023: 2,386
  • 2022: 2,986
  • 2021: 3,016
  • 2020: 2,877
  • 2019: 2,845
  • 2018: 3,056
  • 2017: 2,744
  • 2016: 3,079
  • 2015: 2,777
  • 2014: 2,636
  • 2013: 2,746
  • 2012: 3,189
  • 2011: 2,907
  • 2010: 3,051
  • 2009: 2,531
  • 2008: 2,594
  • 2007: 2,840
  • 2006: 2,761
  • 2005: 2,954
  • 20 Year GDD Average for Wooster on 9/18 - 2,846
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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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