FROST Station : GRIGGSVILLE, IL3717 Start yr. - 1971 End yr. - 1989 Requested years of data: 19 Available years of data: 19 Spring: Years of missing data 24 deg = 1, 28 deg = 1, 32 deg = 1 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 18, 28 deg = 18, 32 deg = 18 Fall: Years of missing data 24 deg = 1, 28 deg = 1, 32 deg = 0 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 18, 28 deg = 18, 32 deg = 19 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 12 | April 16 | April 27 | | | 2 year in 10 later than-- | April 7 | April 12 | April 22 | | | 5 year in 10 later than-- | March 27 | April 4 | April 13 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 25 | October 11 |September 28 | | | 2 yr in 10 earlier than-- | October 30 | October 17 | October 4 | | | 5 yr in 10 earlier than-- | November 7 | October 28 | October 15 | | | ------------------------------------------------------------------------