Washington D.C. is set to experience a calm evening with partly cloudy skies, according to the Capital Weather Gang. Temperatures tonight will range from the 30s to near 40°F (1-4°C), dropping overnight into the 20s to near 30°F (-6 to -1°C). Residents can expect a thickening of clouds on Sunday, leading to a predominantly overcast day with a slight chance of light, brief afternoon showers. High temperatures are predicted to be within a few degrees of 45°F (7°C).