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.

Observed GWDDs in the charts and tables below cover the current natural gas demand season, the 2023-24 Withdrawal Season which runs from November 1, 2023 to March 31, 2024.




5-Year Historical Comparison


Historical Weather Data

Historical temperature data for the past 3 months to 1 year is collected on this page. 3-month daily plots of gas-weighted degree days (GWDDs) are shown to the left. This data updates daily at around Midnight EDT. 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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