Aaron Hanson Thesis Book.pdf - NDSU - North Dakota State ...

climate data for st. cloud, mnGrowing Degree DaysFigure 52. St. Cloud, MN.The growth rate of many biological organisms is primarily controlled by temperatures (Gibson, 2003).Growing degree days (GDD) are used to predict vegetation development rates, which can determine whena plant may bloom or reach maturity. It is defined by a base temperature, which in this case is 50F, andtemperatures above that number increase the growth rate. For St. Cloud, the months from June to Augustcan expect to have the most growth in vegetation.HumidityFigure 53. St. Cloud, MN.The percentage of humidity can be related to the human comfort level ofpeople. This can be used to approximate when more people may be outside,and when there is a higher level of humidity, more people may want to beby the river to cool down. There is a higher humidity in the mornings in St.Cloud than in the evenings.60