Table 1. Mean monthly temperatures and day lengths for the duration of the common garden experiment
Month Mean observed temperature, °C Day length, h
October 12.3 10.9
November 8.6 9.7
December 4.1 9.1
January 1.8 9.5
February 2 10.5
March 4.6 11.9
  • Temperature data was gathered from the National Climatic Data Center (National Oceanic and Atmospheric Adminitration) for T. F. Green Airport in Providence.