How humid does it get during the summer months?
Question & Answer about Maryland
Updated June 11, 2026
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Maryland State Facts
State Flag
Maryland
Capital
Annapolis
State Bird
Baltimore Oriole
Statehood
April 28, 1788
State Flower
Black-eyed Susan
Population
6.2 million (2020)
Answer
Maryland experiences quite high humidity during the summer months, often making the heat feel more intense. Average relative humidity levels typically range from 60% to 80%, with mornings and evenings generally more humid than midday.
The state's location along the Mid-Atlantic coast, proximity to the Chesapeake Bay, and Atlantic Ocean contribute to this moisture in the air. Cities like Baltimore and Annapolis often see muggy conditions, especially from June through August. Humidity combined with summer temperatures frequently in the 80s to low 90s Fahrenheit (27–35°C) can lead to a high heat index, increasing discomfort. Occasional thunderstorms and rain showers also add to the overall moisture during this period.
Key Points:
- Summer humidity usually between 60% and 80%
- Coastal and bay proximity increases moisture
- Heat index often feels hotter due to humidity
- Common muggy mornings and evenings
The state's location along the Mid-Atlantic coast, proximity to the Chesapeake Bay, and Atlantic Ocean contribute to this moisture in the air. Cities like Baltimore and Annapolis often see muggy conditions, especially from June through August. Humidity combined with summer temperatures frequently in the 80s to low 90s Fahrenheit (27–35°C) can lead to a high heat index, increasing discomfort. Occasional thunderstorms and rain showers also add to the overall moisture during this period.
Key Points:
- Summer humidity usually between 60% and 80%
- Coastal and bay proximity increases moisture
- Heat index often feels hotter due to humidity
- Common muggy mornings and evenings
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