The National Weather Service has issued a flood watch for the Baltimore-Washington, D.C. area until 2 p.m. on Monday.
At 4:40 a.m., NWS said periods of moderate to heavy rain will fall across an area extending from Orange County, Va. (about 85 miles southwest of Washington) to Harford County.
Rainfall will taper off from west to east during the afternoon, and the area should expect up to two inches of rain, with higher amounts possible, NWS said.
The rainfall could cause streams and creeks to overflow and cause minor flooding in urban and poor-drainage areas, NWS said.
Despite the heavy rain, temperatures are expected to climb to a high of 61 degrees by 10 a.m. before tapering off to 55 degrees by the start of rush hour. Expect temperatures to fall to a low of 37 degrees Monday night.