D.C.-area forecast: The last weekend of summer will feel the part.
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Forecast in detail
Our average high is about 80 degrees and falling half a degree a day. Keep that in mind as we spend the days to come in temperatures consistently, and, at times, considerably above normal. The good news is that it might be the last blast of true summertime heat. In another few weeks, getting temperatures to rise so high becomes increasingly difficult. Of course, with heat these days, you dont want to give it a reason to do weird stuff.
Tomorrow (Sunday): High pressure begins to flex, so clouds are again hard to find. Were getting deeper into this summerlike air mass. High temperatures end up in the mid- and upper 80s. Winds are from the south and southwest. Confidence: Medium-High
Tomorrow night: Mainly clear skies persist. Its another nice evening to be out and about! Low temperatures range across the 60s. Light south winds pump dew points deeper into the 60s, so humidity is becoming increasingly noticeable. Confidence: Medium-High
https://www.washingtonpost.com/weather/2022/09/17/dc-area-forecast-last-weekend-summer-will-feel-part/?