With the period between the last spring and first fall freeze (frost free days) complete this year, it is a good time to look at the trend of this metric for Ames since 1893. The featured chart displays the yearly totals and a simple linear trend is fitted to the data. For the various climate change metrics for Iowa, this is one of the strongest signals going. This year is shown slightly above trend line and inline with the past 20 years or so of longer than average number of frost free days.

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Tags:   growingseason