Dallas-Fort Worth runs hot and long: blistering summers, mild winters, with occasional sharp winter cold snaps that the 2021 storm made famous. Below: live conditions, the 7-day outlook, and what it means for electricity demand on the ERCOT grid.
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High and low temperatures, with the implied heating and cooling demand below.
Texas demand is overwhelmingly a cooling story. When temperatures push past 100 degrees Fahrenheit, air conditioning across the ERCOT footprint can drive record peaks, and prices can spike from single digits to the cap within hours. Rare winter freezes are the other risk: they raise heating load while threatening gas supply and generation, the dynamic behind Winter Storm Uri.
ERCOT peaks in summer, typically late afternoon in July and August. Watch both the daytime cooling peak and, in winter, the morning heating spike during a hard freeze.
See live ERCOT grid data →They measure how far the day's average temperature sits from a comfortable 65°F. Cooling degree days (CDD) count degrees above 65 and track air-conditioning demand; heating degree days (HDD) count degrees below 65 and track heating demand. More degree days means more energy used to keep buildings comfortable, and a higher grid load.
Temperature is the single biggest short-term driver of electricity demand. Hot afternoons and cold mornings push load toward the grid's limits, which is when prices rise and reliability is tested. Watching the forecast is watching the grid's next few days.
Live weather and the 7-day forecast come from Open-Meteo. Degree days are computed from the forecast highs and lows against a 65°F base. Live grid data is on the ERCOT region page.