Temperatures hit the 80s around Baltimore for a fourth consecutive day Thursday, and with summerlike humidity, it felt like the lower 90s.
And more unseasonably warm weather is forecast for next week.
Temperatures reached 88 degrees by 2 p.m. at Baltimore-Washington International Thurgood Marshall Airport, with a heat index of 93 degrees.
High pressure to the south of the region is bringing the warm, moist air. Dew points are expected to reach the lower 70s, a level relatively common this summer but more rare in the fall.
Normal high temperatures in early October are in the lower 70s, sliding into the upper 60s.
But every day in October has reached the 80s so far in the young month. And after a cold front moves through overnight, bringing a cooler spell for Friday and Saturday, that trend is forecast to continue into next week.
Highs are forecast in the lower 80s, with more uncomfortable humidity, into at least the middle of next week.
Climate forecasts suggest a virtual certainty of warmer-than-normal temperatures across the eastern United States into the middle of the month.