Evening 70s dip down to the mid-60s downtown by just before dawn, with mid-50s possible in the coolest suburbs. Low temperatures before dawn could drop to the mid-50s outside of the Beltway, low 60s probable downtown. Confidence: MediumTuesday could prove a bit muggier, helping create that summery feeling with high temperatures near 90 to low 90s. Tomorrow (Saturday): Looking good with sunshine, upper 70s to low 80s, and comfortable humidity levels (dew points around 50! Low temperatures probably don’t get as cool, bottoming out near 60, to mid-60s downtown.

Source: Washington Post June 17, 2016 09:04 UTC