Degree Days.net
An excellent source of free, global heating and cooling degree day data.
U.S. Weather Data:
Historical Heating & Cooling Degree Day Data
From the NOAA
Weekly Degree Day Assessment
From the Climate Prediction Center
Weekly Heating Degree Day Forecast
From the Climate Prediction Center
Weekly Cooling Degree Day Forecast
From the Climate Prediction Center
Degree Day Map – most recent week
From the Climate Prediction Center
Degree Days Totals & Deviations from Normal
From the Climate Prediction Center
New York State Heating Degree Day Data
From the NYS Energy Research and Development Authority
Heating Degree-Days by Month, 1949-2006
From the U.S. Energy Information Administration
Cooling Degree-Days by Month, 1949-2006
From the U.S. Energy Information Administration
Heating Degree-Days by Census Division, 1949-2006
From the U.S. Energy Information Administration
Cooling Degree-Days by Census Division, 1949-2006
From the U.S. Energy Information Administration
Monthly Heating Degree Day Records 1949-present
From Meteorology Services
Monthly Cooling Degree Day Records 1949-present
From Meteorology Services
UK Data:
Monthly UK Degree Day Data
From Vesma.com – The Energy Management Register
Standard heating and cooling degree days for the UK
From Vesma.com – The Energy Management Register
20-year average heating degree days for the UK
From Vesma.com – The Energy Management Register
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