Projecting Coldest U.S. Gas Population Weight HDD for January This Century

Fig. 1: The Climate Impact Company U.S. gas population weight HDD forecast for each month of the 2024-25 cold season.

Discussion: The waves of cold air into the U.S. during January 2025 has caused the projected U.S. population weight HDD to 1060 (Fig. 1) for the mid-winter month which eclipses the previous high of 1045 in 2014 (Table 1). The cold spikes are vividly indicated in important energy sectors such as PJM-East, PJM-West, and ERCOT (Fig. 2-4). The February 2025 forecast is cautiously back toward normal.

Table 1: The Climate Impact Company projected U.S. gas population weight HDD for January 2025 is 1060 which is the coldest of this century.

Fig. 2: The Climate Impact Company PJM-East selected cities consensus HDD forecast for each month of the 2024-25 cold season.

Fig. 3: The Climate Impact Company PJM-West selected cities consensus HDD forecast for each month of the 2024-25 cold season.

Fig. 4: The Climate Impact Company ERCOT selected cities consensus HDD forecast for each month of the 2024-25 cold season.