Dec 2019 Climate Update for Grand Rapids, Michigan
Max Temp 61, Mean Max 53
Min Temp 7, Mean Min 4
Av Temp 33.2, Mean Av 28.4
Precip 4.04, Mean 2.44
Snow 14.3, Mean 16
Heating Degree Days 978, Mean 1129
HDD Season to date 2400, Mean 2486
Annual 2019 Climate Update for Grand Rapids, Michigan
Max Temp 92, Mean 94
Min Temp -10, Mean -7
Av Temp 48.5, Mean 48.2
Precip 51.37, Mean 34.75 (wettest year on record since 1892)
Cooling Degree Days 742, Mean 693
2019 was 0.6% warmer overall, as indicated by mean average temperature. The short summer air conditioning season was 7.1% warmer, as indicated by mean cooling degree days. Despite this mean maximum temperature was never reached.
The 2019-2020 heating season has been variable to date, but through Dec 2019 is deviating from mean heating degree days by less than 4% to the mild side. The previous heating season was utterly normal.
