September weather forecast
Maryland, USA

September in Maryland marks the beginning of autumn and a notable transition from the hot, humid summer months. The oppressive heat starts to recede, and temperatures range between 65°F (18.3°C) and 80°F (26.7°C), though occasional warmer days are not uncommon.

The eastern regions near the ocean continue to experience some lingering humidity, while the western parts of the state welcome a more temperate and comfortable climate. The humid subtropical climate of the east gives way to milder oceanic and humid continental conditions in the west.

Rainfall becomes more evenly distributed, and the arrival of cold fronts may lead to sudden weather changes. The Allegheny Plateau, known for its heavier precipitation, continues to influence Maryland's overall climate.

September's weather encourages outdoor exploration and activities, with the cooler temperatures providing a comfortable environment for hiking, sightseeing, and enjoying the state's natural beauty. The changing leaves begin to add color to the landscape, especially in the forested mountains of western Maryland.

Compared to the peak heat of July and August, September's weather offers a pleasant contrast and introduces the refreshing characteristics of autumn. The transition from summer to fall is gradual, allowing residents and tourists to savor the warmth while enjoying the emerging coolness.

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• Baltimore - September »
  In Baltimore during September, the rain falls for 13.2 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Baltimore in September, it is raining for 13.2 days, with typically 2.24" (57mm) of accumulated precipitation.
• Frederick - September »
  In Frederick in September, during 13.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. September marks the beginning of the fall season in Frederick when the leaves start to change color and daylight begins to shorten.
• Rockville - September »
  With the onset of September, Rockville experiences a modest temperature adjustment, with the average high-temperature gently receding from 85.3°F (29.6°C) in August to a still moderately hot 77.9°F (25.5°C). On the first day of September in Rockville, sunrise is at 6:37 am and sunset at 7:39 pm.
• Gaithersburg - September »
  In Gaithersburg in September, during 12.9 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Gaithersburg's September weather represents the gateway to fall, with temperatures declining from the peak summer highs to a range from 59.9°F (15.5°C) to 77.7°F (25.4°C).
• Bowie - September »
  On the first day of September in Bowie, sunrise is at 6:35 am and sunset at 7:38 pm. In Bowie, in September, it is raining for 12.6 days, with typically 2.13" (54mm) of accumulated precipitation.
• Hagerstown - September »
  The commencement of September in Hagerstown includes a gentle temperature shift, with the average high-temperature dropping a bit from 82.2°F (27.9°C) in August to a still warm 75.6°F (24.2°C). In Hagerstown snow does not fall in May through September.
• Annapolis - September »
  As August shifts into September a minor alteration in temperatures is observed, with average highs reducing from a warm 83.3°F (28.5°C) to a still moderately hot 77°F (25°C). On the first day of September sunrise is at 6:34 am and sunset at 7:37 pm.
• College Park - September »
  The month with the least rainfall in College Park is September, when the rain falls for 11.9 days and typically collects 1.93" (49mm) of precipitation. In College Park, in September, it is raining for 11.9 days, with typically 1.93" (49mm) of accumulated precipitation.
• Salisbury - September »
  On the first day of September in Salisbury sunrise is at 6:31 am and sunset at 7:32 pm. In Salisbury in September, it is raining for 13.5 days, with typically 1.85" (47mm) of accumulated precipitation.
• Laurel - September »
  September ushers in the unfolding fall season in Laurel, Maryland with visible transformations throughout the city. In September, in Laurel the rain falls for 13.4 days.
• Greenbelt - September »
  In Greenbelt in September, during 12.3 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. As Greenbelt enters September, the average high-temperature subtly lowers from the a moderately hot 85.1°F (29.5°C) of August to a still warm 78.1°F (25.6°C).
• Cumberland - September »
  On the last day of September, in Cumberland, sunrise is at 7:10 am and sunset at 6:59 pm EDT. On the first day of September in Cumberland, sunrise is at 6:43 am and sunset at 7:46 pm.