Tonight is a rerun of last night’s greatest hit: high pressure sitting overhead, clear skies, and light southeast breezes doing their best radiational-cooling routine. NWS Baltimore/Washington (2:16 PM update) and NWS Wakefield (2:19 PM) both keep it simple — dry and quiet, with a slightly milder floor than last night’s chill. NWS Mount Holly’s 4:26 PM update confirms the same theme up in the Cecil County corner. No watches, warnings, or advisories anywhere in Maryland tonight. Enjoy it — Wednesday starts the warm-up, and by Thursday the humidity and storm chances come roaring back.
Tonight’s Timeline
- Evening (6–9 PM): Clear skies statewide, light winds, comfortable temps in the 60s to near 70 lingering from the afternoon.
- Late evening into midnight: Temperatures drop steadily under clear skies; best radiational cooling in the valleys west of the Blue Ridge and across the Piedmont.
- Midnight–3 AM: Coldest window for most spots away from the water; a marginal uptick in southeast gusts possible over the upper Chesapeake Bay (more on that below).
- Pre-dawn Wednesday: Lows bottom out, mild breeze returns from the south as high pressure slides offshore, setting up tomorrow’s warm-up.
Region by Region
Western Maryland
Garrett County (Deep Creek/Oakland): Clear and calm, low near 57°, light south winds around 3 mph. Grab a jacket for the evening dock sit — mountain air still has some bite left in it.
Allegany County (Cumberland): Mostly clear, low around 56°, near-calm winds out of the southeast. Textbook radiational cooling in the valley tonight.
Northern & Central Maryland
Washington County (Hagerstown): Mostly clear, low near 57°, southeast winds around 6 mph.
Frederick County: Mostly clear, low near 58°, light south winds around 3 mph.
Carroll County: Same story — clear skies, upper 50s low, calm winds. Good night for stargazing before the humidity creeps back in.
Baltimore Metro
Baltimore City & County: Clear skies, low around 62° — the urban core and I-95 corridor stay mildest tonight.
Harford County: Clear, low in the low-to-mid 60s, light south winds.
Howard County: Clear, low near 62°, calm.
Anne Arundel County: Clear, low near 62°, with the Bay shoreline holding a touch milder overnight.
DC Suburbs
Montgomery County: Mostly clear, low near 59°, light south winds 2–6 mph.
Prince George’s County: Mostly clear, low in the upper 50s to near 60°, similarly light winds.
Southern Maryland
Charles County: Mostly clear, low near 61°, south winds around 5 mph.
Calvert County: Mostly clear, low near 61°, Bay-moderated air keeping things mild along the shoreline.
St. Mary’s County: Mostly clear, low near 61°, light south breeze off the Potomac and Bay.
Upper Eastern Shore
Cecil County: Mostly clear, low near 58°, southeast winds around 5 mph.
Kent County: Similar — clear and calm, low near 58°.
Queen Anne’s County: Mostly clear, low near 58°, light southeast flow off the Bay.
Talbot County: Mostly clear, low near 58°, mild near the water.
Caroline County: Clear inland, low near 58°, a touch cooler away from tidal influence.
Lower Eastern Shore
Dorchester County: Mostly clear, low near 57°, light east winds.
Wicomico County: Mostly clear, low near 57°, calm to light easterly breeze.
Somerset County: Mostly clear, low in the upper 50s, quiet conditions.
Ocean City & the Coast
Worcester County / Ocean City: Mostly clear, low near 63° — mildest spot on the map tonight thanks to the ocean influence. East winds 2–8 mph. Surf: tonight’s surf holds at today’s 3 to 4 feet, then eases back to 2 to 3 feet Wednesday. Rip current risk: today’s Moderate risk was in effect from 8 AM through this evening and has ended for the night — swimmers should note the risk returns Wednesday, also rated Moderate. Tides at the Ocean City Fishing Pier: next high around 11:46 AM Wednesday. Water temps holding in the mid 70s — still very swimmable, just mind the currents once the beach reopens for the day.
Active Hazards
None. No watches, warnings, or advisories are in effect anywhere in Maryland tonight. NWS Baltimore/Washington’s Hazardous Weather Outlook explicitly notes no hazardous weather expected through tonight.
Severe & Flooding
None expected tonight or Wednesday. Confidence is high — this is about as tranquil as Maryland weather gets, with high pressure firmly in charge. The next chance for any thunderstorm activity doesn’t arrive until Wednesday night into Thursday, and even then, severe potential looks low.
Winds & Chesapeake Bay/Marine
Winds statewide are light tonight, generally under 10 mph out of the south to southeast. The one item worth flagging: as high pressure drifts offshore, a brief and marginal period of southeast gusts near Small Craft Advisory levels could develop over the upper Chesapeake Bay roughly from mid-evening through 2–3 AM. NWS Baltimore/Washington notes confidence is currently too low to issue an actual advisory, but Bay boaters on the upper Chesapeake should keep an eye on conditions overnight. Southerly channeling effects may prompt Small Craft Advisories Wednesday afternoon/evening and especially Thursday afternoon/evening as the pattern warms.
Overnight Lows by Zone
| Zone | Low |
| Western Mountains (Garrett/Allegany) | 56–57° |
| Cumberland/Hagerstown | 56–57° |
| Frederick/Carroll | 58° |
| Baltimore/DC Corridor | 59–62° |
| Southern Maryland | 61° |
| Eastern Shore (Upper & Lower) | 57–58° |
| Ocean City | 63° |
Looking Ahead
Wednesday: Sunny and noticeably warmer as high pressure slides toward the coast. Highs push into the mid-to-upper 80s across central and southern Maryland (Baltimore/DC area around 85–86°, Hagerstown near 87°, Cumberland near 89°), with the Western Mountains staying cooler in the low 80s and Ocean City holding in the mid 70s under an onshore flow. Essentially dry, though a stray late-day shower can’t be ruled out right at the Appalachian crest.
Thursday: Warmer and more humid, with highs near 88–89° in the Baltimore/DC corridor and Hagerstown/Frederick area, and shower/thunderstorm chances increasing — likely west of I-95, with better coverage over the mountains (60-70% in Garrett/Allegany) and lower but growing chances (25-45%) spreading toward central Maryland by Thursday evening. Gusty storms can’t be ruled out given the heat, though widespread severe weather isn’t expected.
Data: NWS Baltimore/Washington, Mount Holly & Wakefield.
MD Weather Alerts — your director’s-cut forecast, every county, every night. Sleep well, Maryland; the humidity’s coming for you Thursday.