Baltimore, Annapolis, Frederick and the Entire Maryland Metro Face One Last Cool Night With Temperatures Dropping to the Low 40s Before a Heat Surge Takes Over Next Week
BALTIMORE, MD — Crack the windows open tonight, Maryland — because this comfortable chill may be the last one you feel for a while. A refreshingly cool night is settling across the Baltimore Metro, Washington D.C. corridor, and the broader Maryland region, with overnight lows dropping into the low to mid 40s from Frederick west to Elkton east, and forecasters are already warning that the mild air does not last. By next week, the heat moves in and the windows stay shut.
For tonight, though, the weather is about as pleasant as spring gets in the mid-Atlantic.
One Last Comfortable Night Before the Heat Arrives
Overnight low temperatures across the Baltimore Metro and surrounding Maryland communities are forecast to settle into a narrow and comfortable band, ranging from the upper 30s at the coolest inland and elevated locations to the upper 40s along the more sheltered urban and bay-side communities. Cloud cover will be partial across the region, with clearer skies developing toward the eastern shore overnight.
The coolest readings tonight will be across the northern and western fringe of the region, where rural terrain and lower humidity allow temperatures to drop most efficiently after sunset. Parkton in northern Baltimore County is forecast to be among the coldest communities in the metro tonight, dropping to 40 degrees — the only location in the current forecast map dipping to that threshold. Frederick, Maryland, situated further inland and at slightly higher elevation, is expected to bottom out at 42 degrees tonight, making it the coolest of the major metro communities west of Baltimore.
The city of Baltimore itself is forecast to hold at 47 degrees overnight, with the urban heat island effect keeping city temperatures a few degrees warmer than surrounding suburban and rural areas. Communities along the Chesapeake Bay corridor benefit from the moderating influence of bay water temperatures and tend to run warmer than inland points — Annapolis leads the entire region tonight with a forecasted low of 49 degrees, the warmest overnight reading in the current metro outlook.
Tonight’s Low Temperature Breakdown Across Maryland
Working across the full forecast map from west to east, tonight’s low temperatures tell a consistent story of a cool, settled, and genuinely comfortable spring night:
Frederick drops to 42 degrees, sitting as the coolest major community on the western edge of the metro. Moving into the northern Baltimore County corridor, Westminster is forecast at 44 degrees and Parkton dips to 40 degrees, the regional cool spot for the night. Cockeysville holds at 43 degrees with Glenelg also at 44 degrees as the inner suburban ring settles into the mid 40s range.
In the core Baltimore Metro, the city posts a 47-degree low with Beltsville at 44 degrees and Gaithersburg also holding at 44 degrees across the Montgomery County corridor extending toward Washington D.C., which is forecast at 47 degrees tonight — matching the city of Baltimore almost exactly.
Moving southeast toward the Bay, Severn comes in at 45 degrees and Annapolis at the warmest 49 degrees of the region. On the Eastern Shore, Edgewood posts 46 degrees, Aberdeen at 45 degrees, Chestertown at 44 degrees, Centreville at 44 degrees, Easton at 44 degrees, Greensboro at 43 degrees, and Elkton in the northeastern corner of the state at 43 degrees.
Tonight’s Complete Low Temperature Summary
| Community | Tonight’s Low | County/Region |
|---|---|---|
| Parkton | 40°F | Northern Baltimore County |
| Frederick | 42°F | Frederick County |
| Greensboro | 43°F | Caroline County |
| Cockeysville | 43°F | Baltimore County |
| Elkton | 43°F | Cecil County |
| Westminster | 44°F | Carroll County |
| Glenelg | 44°F | Howard County |
| Gaithersburg | 44°F | Montgomery County |
| Beltsville | 44°F | Prince George’s County |
| Chestertown | 44°F | Kent County |
| Centreville | 44°F | Queen Anne’s County |
| Easton | 44°F | Talbot County |
| Aberdeen | 45°F | Harford County |
| Severn | 45°F | Anne Arundel County |
| Baltimore | 47°F | Baltimore City |
| Washington D.C. | 47°F | D.C. Metro |
| Edgewood | 46°F | Harford County |
| Annapolis | 49°F | Anne Arundel County |
What Changes Next Week
Tonight’s comfortable conditions represent the tail end of a mild, stable spring pattern across Maryland and the D.C. Metro corridor. Current analysis indicates temperatures are expected to climb significantly heading into next week, with the region shifting into a notably warmer air mass that will push daytime highs and overnight lows well above what residents are experiencing tonight.
The practical reality for most households across Baltimore, Frederick, Annapolis and the surrounding communities is straightforward: tonight is a rare gift in the middle of a warming spring season. The kind of night where sleeping with the windows open is not just possible but genuinely comfortable — cool enough to need a light blanket, calm enough to hear the neighborhood settle in for the evening, and pleasant enough that most people who step outside after dark will notice it immediately.
That window — in every sense of the word — closes soon.
Once the warmer pattern establishes itself next week across Maryland, overnight lows will climb back into ranges that make open-window sleeping uncomfortable, and the regional focus will shift from enjoying the cool air to managing the heat. Residents with outdoor plans, yard work, or activities that benefit from mild temperatures are well-advised to take advantage of the next 24 hours before the pattern changes.
Forecast Confidence
Forecast Confidence: High. Tonight’s overnight low temperatures across the Baltimore Metro and Maryland are well-established and consistent across all available model guidance. The cool, settled conditions are not in question. The transition to warmer temperatures next week is equally well-supported in the current outlook, with multiple data runs in agreement that the mild spring pattern gives way to a warmer regime beginning early next week across Maryland, Washington D.C., and the broader mid-Atlantic region.
More Maryland and mid-Atlantic weather coverage is always on the horizon. Stay informed at ChicagoMusicGuide.com — your source for temperature and seasonal weather tracking across Baltimore, the Chesapeake Bay region, and the entire United States.