Warm start, cold finish
You'll not find better weather anywhere than these next two days in Baltimore. In my book, April is the best month of the year in Maryland. The place is awash in blossoms. They're calling for blue skies and highs today and Tuesday in the mid-70s. Perfect. But it won't last. Sorry.
At midweek we'll get a cold front through the region. Late Tuesday and Wednesday there's a chance of showers or thunderstorms, with cold air pouring in to the region from northwest Canada. There's even mention of snow showers in the higher elevations. Don't put out any tender plants just yet. The forecast lows for the Baltimore region slip down into the upper 20s starting Thursday night. AccuWeather says Easter here could be colder than last Christmas.