Months in 2018 ranked for highest average monthly temperature in 127 years (since 1892):
Jan: 54th
Feb: 21st
Mar: 56th
Apr: 123rd (4th lowest average temperature on record for April)
May: 4th highest average temperature on record for May
Jun: 29th
Jul: 21st
Aug: 11th
Average for 2018 to date: about 40th (mean is about 64th; six years numbered 62-67 populate the mean annual average temperature record of 48.2).
So overall to date conditions have been about 38% warmer than the mean in Grand Rapids (2400/64), which is the same result obtained from analysis of the Cooling Degree Day data.
