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Washington dc weather in late september
Get the monthly weather forecast for Washington, DC, including daily high/low, historical averages, to help you plan ahead. Understand direct current and its applications. . In Washington, D.C. during September average daily high temperatures decrease from 83°F to 74°F and it is overcast or mostly cloudy about 36% of the time. Get the monthly weather forecast for Washington, DC, including daily high/low, historical averages, to help you plan ahead. Get the monthly weather forecast for Washington, DC, including daily high/low, historical averages, to help you plan ahead. Get the monthly weather forecast for Washington DC, DC, including daily high/low, historical averages, to help you plan ahead. Learn about DC-DC converter types and their uses.