FROST Station : DURHAM, NC2515 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 28 Spring: Years of missing data 24 deg = 8, 28 deg = 8, 32 deg = 8 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 22, 28 deg = 22, 32 deg = 22 Fall: Years of missing data 24 deg = 4, 28 deg = 4, 32 deg = 4 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 26, 28 deg = 26, 32 deg = 26 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 2 | April 12 | April 29 | | | 2 year in 10 later than-- | March 27 | April 7 | April 24 | | | 5 year in 10 later than-- | March 15 | March 28 | April 13 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 26 | October 14 | October 7 | | | 2 yr in 10 earlier than-- | November 2 | October 20 | October 12 | | | 5 yr in 10 earlier than-- | November 15 | October 29 | October 20 | | | ------------------------------------------------------------------------