Maryland Weather Forecast for Monday, July 20, 2026
Maryland is waking up to a noticeably quieter and more comfortable weather pattern this Monday. After the recent stretch of heat, humidity, haze and thunderstorms, most of the state can expect a dry day with abundant sunshine, manageable humidity and temperatures running slightly below normal for the middle of July.
Conditions will begin changing tonight, however, as moisture returns ahead of a potentially significant round of strong to severe thunderstorms Tuesday.
Monday Morning
Most Marylanders will experience a dry and pleasant start to the workweek. Temperatures early this morning are generally in the 60s, with some lower 70s closer to the Chesapeake Bay and immediate coast.
Patchy fog may briefly reduce visibility in portions of Western Maryland, especially within sheltered mountain and river valleys. Drivers around Garrett, Allegany and western Washington counties should use additional caution through the early morning.
Elsewhere, the morning commute should remain dry with mostly sunny skies. Some thin, high-altitude wildfire smoke may give the sky a slightly hazy appearance, particularly across northern and eastern portions of Maryland, but widespread surface-level smoke impacts are not currently expected.
Monday Afternoon
High pressure will remain in control through the afternoon, providing Maryland with one of the more comfortable days we have experienced recently.
Skies will range from mostly sunny to partly cloudy. Humidity will remain relatively low, and no widespread afternoon thunderstorms are expected.
Expected High Temperatures
- Western Maryland mountains: 79–82°
- Cumberland and western valleys: 83–85°
- Frederick and north-central Maryland: 83–86°
- Baltimore metropolitan area: 83–86°
- Washington suburbs: 85–88°
- Southern Maryland: 85–88°
- Upper and central Eastern Shore: 83–86°
- Lower Eastern Shore: 83–86°
- Ocean City and the beaches: Around 80°
Light northeast winds this morning will gradually turn toward the southeast during the afternoon. Overall, outdoor conditions should be favorable across the state, although normal summertime precautions—including hydration and sunscreen—are still recommended.
Monday Evening and Overnight
The evening will begin quietly with partly cloudy skies and temperatures falling through the 70s.
Changes will become more noticeable overnight as a warm front begins moving northward. Clouds will increase, humidity will rise and scattered showers or thunderstorms may begin developing from south to north, particularly during the second half of the night.
Most evening outdoor plans should remain dry, but anyone staying out late should monitor radar as rain chances gradually increase.
Winds will also strengthen over portions of the Chesapeake Bay. A Small Craft Advisory is scheduled for parts of the Bay from 8 p.m. Monday through 5 a.m. Tuesday. Boaters should be prepared for increasing southeast winds and rougher conditions.
Significant Storm Threat Tuesday
Tuesday is expected to bring a much more active and potentially hazardous weather pattern to Maryland.
A warm and increasingly humid air mass will spread across the state as a strong upper-level disturbance and cold front approach from the west. Multiple rounds of showers and thunderstorms may develop, beginning with scattered activity during the morning before the strongest storms become more likely during the afternoon and evening.
The Storm Prediction Center has placed portions of Maryland within an Enhanced Risk—Level 3 of 5—for severe thunderstorms, with a severe-weather threat extending across the state.
The primary hazards Tuesday include:
- Widespread or locally significant damaging wind gusts
- Torrential rainfall and flash flooding
- Frequent lightning
- Large hail
- The possibility of a few tornadoes
Storms may arrive in multiple rounds, meaning one location could experience heavy rain more than once. Rainfall rates may become intense, especially where storms repeatedly move across the same communities.
Tuesday’s exact timing and highest-risk locations will become clearer as the event approaches. Marylanders should make sure weather alerts are enabled, secure loose outdoor objects and review where they would shelter if a warning is issued.
Looking Ahead
Additional showers and thunderstorms may continue into Wednesday, especially east of the Blue Ridge and across the Eastern Shore. The severe-weather threat should gradually decrease as the cold front moves through.
Much cooler and less humid air is expected to arrive behind the front. Thursday and Friday currently look mainly dry and pleasant, with afternoon temperatures generally in the upper 70s and lower 80s across much of Maryland.
Enjoy Monday’s comfortable weather, but use the quiet conditions to prepare for Tuesday’s potentially significant storms.
Stay with MD Weather Alerts for statewide forecasts, updates and urgent weather information throughout the day.