• DC: Summer Heat to Hold Beyond Labor Day

    September 1, 2014; 4:25 AM ET

    Labor Day weekend traditionally marks the unofficial end to summer, but the weather has another idea in mind around Washington, D.C., with a prolonged stretch of summer heat underway.

  • Boston: Warmth to Hold Beyond Labor Day

    September 1, 2014; 4:18 AM ET

    Labor Day weekend traditionally marks the unofficial end to summer, but the weather has another idea in mind with summer warmth surging in around Boston.

  • Pittsburgh to Stay Humid Beyond Labor Day

    September 1, 2014; 4:16 AM ET

    Labor Day weekend traditionally marks the unofficial end to summer, but the weather has another idea in mind around Pittsburgh with a prolonged stretch of steamy air underway.

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WeatherWhys®

This Day In Weather History

Yuma, AZ (1950)
123 degrees - hottest temperature ever in Yuma. Yuma is the hottest city in the U.S.

Los Angeles, CA (1955)
110 degrees, hottest day ever in September. This mark was tied September 4, 1988.

Milwaukee, WI (1988)
Hottest summer on record. Six days of 100 degrees or greater and 36 days of 90 or above. Average temperature of 73.8 beat the old record of 72.8 set in 1921 and 1955. The normal average tempera- ture for a summer in Milwaukee is 68.3 degrees.