when is washington, dc's highest average temperature
Washington DC: Annual Weather Averages. July is the hottest month in Washington DC with an average temperature of 27Â°C (80Â°F) and the coldest is January at 4Â°C (38Â°F) with the most daily sunshine hours at 9 in July. The wettest month is May with an average of 100mm of rain. Loading weather data. Please waitâ¦. Loading weather data.