An arc of tropical moisture extending across Mexico from the western Gulf of Mexico and northeastward to the Midwest U.S. is (clearly) evident in the 5-day rainfall forecast equally combining GFS and ECM. Outflow boundaries from the Midwest rains trigger thunderstorms across the Southeast U.S. In the 6-10-day period, the Mexico/Southwest U.S. Wet Monsoon intensifies.

The CFS V2 month ahead forecast for the U.S. valid July 2025 indicates widespread above normal temperature from the southern Great Plains and Texas to the Northeast U.S. The southern Great Plains and Texas are where the hottest daytime temperature anomalies occur due to the combination of heat and drier than normal mid-summer climate.

The Climate Impact Company U.S. selected cities CDD forecast for 2025 is updated. The summertime (JUN/JUL/AUG) CDD outlook adjusts hotter. The national average edges upward to 113.9% of the 30-year normal as the JJA-25 forecast edges close to 2022 and 2024 summertime observations which were 3rd and 4th hottest (respectively) on record.

The hottest day in the 7-day NOAA/NWS excessive heat forecast is next Tuesday when the Ohio Valley, including the Chicago area, eastward through the Mid-Atlantic encounters widespread dangerously hot conditions.