Historical Weather

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Historical Weekly Natural Gas-Weighted Degree Days (GWDDs)

GWDDs are a proprietary calculation that takes into account temperature in the form of total degree days (absolute difference of mean daily temperature from 65), population, and regional patterns of natural gas consumption versus other fuels. Simply, a higher number of GWDDs correlates with higher natural gas demand.




Historical Population-Weighted Mean Nationwide Temperatures

Historical Weather Data

Historical temperature data for the past 3 months to 1 year is collected on this page. 1-year plots of gas-weighted degree days and mean population-weighted temperatures are shown to the left, along with more detailed statistics for the past three months. This data updates once a week on Friday evening or Saturday morning. The maps below are generated by NOAA and reflect monthly departures from average mean temperatures and state-by-state monthly ranking versus historical averages. Plots for each of the last six months are provided with new data being added during the first week of each month.


Monthly Departure From Average Mean Nationwide Temperatures

Source: National Oceanic & Atmospheric Administration



Monthly Mean Temperature Historical Ranking By State

Source: National Oceanic & Atmospheric Administration



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